{"id":"AIBD-0732","title":"Evaluators for Energy Trust of Oregon confirm that Nest Seasonal Savings saved about 18 therms per enrolled thermostat in winter 2016-17","summary":"In a randomized pilot, Nest Seasonal Savings cut heating runtime by 4.75%, about 18 therms per opted-in thermostat over winter 2016-17. Summer cooling savings were 4 kWh.","date_observed":"2017-01-01","date_basis":"event","date_precision":"year","benefit_status":"reported","source_collection":null,"source_entry":null,"account":"Nest Seasonal Savings is a service for existing Nest thermostats that makes small changes to setpoints and schedules over three weeks. Energy Trust of Oregon offered it with CLEAResult and Nest in summer 2016 and winter 2016-17. Energy Trust paid Nest for each customer who opted in. Thermostats were randomly assigned to an offer group or a control group, and 6,716 thermostats opted in for winter. Apex Analytics and Demand Side Analytics checked Nest's savings analysis and ran their own billing analysis. They reported on 22 November 2017 that heating runtime fell by 4.75%, about 18 therms per opted-in thermostat. Summer cooling savings were only 4 kWh per thermostat. Over half of the surveyed participants noticed the temperature changes, and a third of those believed that the changes made their homes less comfortable. The evaluators recommended that Energy Trust consider offering the service in winter only. The report does not say whether the optimizations learn from data.","category":"aggregate result","unexpected":false,"purpose":"Nest Labs built Nest Seasonal Savings to make small setpoint and schedule changes on Nest thermostats that save energy without occupants noticing.","system":"Nest Seasonal Savings (setpoint and schedule optimization service for Nest thermostats)","model_version":null,"developer":"Nest Labs","deployer":"Energy Trust of Oregon with CLEAResult and Nest, offered to existing Nest owners","location":"Oregon, United States","domain":"Energy (residential efficiency)","segment":null,"benefit_type":"Reduced Carbon Emissions","work_activities":["4.A.3.a.3"],"taxonomy_note":null,"registry_ids":{},"ratings":[{"group":"personal","depth":1,"reason":"Each opted-in thermostat saved about 18 therms of gas heating over the winter."},{"group":"societal","depth":1,"reason":"Opted-in homes with gas furnaces together saved 110,404 therms over the winter."}],"ai_role":{"status":"assessed","statement":"Thermostats were randomly assigned to be offered the service or to a control group, so the savings estimate isolates the service. The report describes setpoint and schedule changes made by an algorithm and does not say that it learns from data."},"evidence":[{"kind":"evaluation report","citation":"Apex Analytics LLC and Demand Side Analytics. Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation. 22 November 2017.","title":"Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation","url":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","date":"2017-11-22","written_by":"evaluator","quote":"The Nest Seasonal Savings program showed minor summer season cooling savings of only 4 kWh per opt‐in thermostat, while winter heating seasonal savings were significant – approximately 18 therms per opt‐in thermostat over the course of the 2016/2017 winter season."}],"replication":{"produced_by":["Nest applied a series of small setpoint and schedule changes over three weeks.","Customers could override any change or opt out at any time."],"must_hold":["The heating system runs on a schedule set on the thermostat.","Occupants accept small temperature changes without overriding them."],"echoes":[]},"paired_incident":null,"headline":"*Nest Seasonal Savings* trims winter heating in Oregon homes","metric":"about 18 therms per opted-in thermostat","comparator":{"against":"A control group of Nest thermostats from the same population","before":"Baseline heating runtime of 596 hours","after":"28.3 hours less, a 4.75% reduction","basis":"measured","quote":"Nest quantifies electric and natural gas savings based on the reduction in heating or cooling runtime of the HVAC systems compared with the average runtime of the control group of Nest devices selected from the same population.","url":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/"},"later":null,"value":null,"developer_country":"United States","deployer_country":"United States","unrated_because":null,"brief_notes":null,"brief":null,"revisions":[{"date":"2026-10-31","change":"Added the record from the report of Apex Analytics and Demand Side Analytics.","source":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","editor":"AIBD"}],"confidence":"claimed","shade":"low","claim_status":"The evaluator's account","claim_basis":"Sources: the evaluators' evaluation report. The cited evidence includes no independent source and no finding by an external body.","case_jurisdictions":["United States"],"profile":{"case_id":"AIBD-0732","catalog_version":"1.0.0","source_fingerprint":"21dce5867abdf0a3b70f85c34ddb6a6f5521726b4ca0b12334ae3a92ab63430c","collection_refs":[{"collection_id":"aibd","version":"2026-10-31"},{"collection_id":"querist","version":"2026-10-25"}],"source_ids":["AIBD-0732-source-0001"],"families":{"strategic assessments":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"Editorial assignment.","review_state":"not_assessed","coverage":"partial","record_ids":[]},"evaluations":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"Editorial assignment.","review_state":"not_assessed","coverage":"partial","record_ids":[]},"monetary observations":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"Editorial assignment.","review_state":"not_assessed","coverage":"partial","record_ids":[]},"institutional decisions":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"Editorial assignment.","review_state":"not_assessed","coverage":"partial","record_ids":[]}},"fields":{"actors[]":{"state":"value_present","value":{"kind":"record_fields","fields":{"developer":"Nest Labs","deployer":"Energy Trust of Oregon with CLEAResult and Nest, offered to existing Nest owners"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["developer","deployer"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"actors[].ownership_control":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"ai_contribution":{"state":"value_present","value":{"kind":"record_fields","fields":{"ai_role":{"status":"assessed","statement":"Thermostats were randomly assigned to be offered the service or to a control group, so the savings estimate isolates the service. The report describes setpoint and schedule changes made by an algorithm and does not say that it learns from data."}}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ai_role"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"ai_relationship":{"state":"value_present","value":{"kind":"record_fields","fields":{"category":"aggregate result","ai_role":{"status":"assessed","statement":"Thermostats were randomly assigned to be offered the service or to a control group, so the savings estimate isolates the service. The report describes setpoint and schedule changes made by an algorithm and does not say that it learns from data."}}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ai_role","category"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"assessments[].alternatives":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"assessments[].assessor_date":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"assessments[].depth":{"state":"value_present","value":{"kind":"record_fields","fields":{"ratings":[{"group":"personal","depth":1,"reason":"Each opted-in thermostat saved about 18 therms of gas heating over the winter."},{"group":"societal","depth":1,"reason":"Opted-in homes with gas furnaces together saved 110,404 therms over the winter."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ratings"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"assessments[].display_confidence":{"state":"value_present","value":{"kind":"structured","data":{"confidence":"low","evidence_word":"claimed","claim_status":"The evaluator's account","basis":"Sources: the evaluators' evaluation report. The cited evidence includes no independent source and no finding by an external body.","interpretation":"Existing display rule preserved; the richer outcome-specific confidence question still needs review."}},"provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"assessments[].rationale":{"state":"value_present","value":{"kind":"record_fields","fields":{"ratings":[{"group":"personal","depth":1,"reason":"Each opted-in thermostat saved about 18 therms of gas heating over the winter."},{"group":"societal","depth":1,"reason":"Opted-in homes with gas furnaces together saved 110,404 therms over the winter."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ratings"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"assessments[].rubric_version":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"assessments[].status_basis":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"assessments[].target":{"state":"value_present","value":{"kind":"record_fields","fields":{"ratings":[{"group":"personal","depth":1,"reason":"Each opted-in thermostat saved about 18 therms of gas heating over the winter."},{"group":"societal","depth":1,"reason":"Opted-in homes with gas furnaces together saved 110,404 therms over the winter."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ratings"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"availability":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"brief":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"case_kind":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"case_links[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"claims[].evidence_links":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"claims[].evidence_strength":{"state":"value_present","value":{"kind":"structured","data":{"answer":"The evaluator's account. Sources: the evaluators' evaluation report. The cited evidence includes no independent source and no finding by an external body.","evidence_word":"claimed","claim_status":"The evaluator's account"}},"provenance":{"kind":"source_review","basis":"Editorial assignment.","record_fields":["evidence"],"source_refs":["AIBD-0732-source-0001"],"reviewed_on":"2026-10-29"},"review_state":"reviewed","coverage":"complete","display":{"answer":"The evaluator's account. Sources: the evaluators' evaluation report. The cited evidence includes no independent source and no finding by an external body.","inferred":false}},"claims[].missingness":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"claims[].proposition":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"cross_border_flows[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"decisions[].action_outcome":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"institutional decisions"},"decisions[].grounds":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"institutional decisions"},"decisions[].institution_task":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"institutional decisions"},"decisions[].success_criterion":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"institutional decisions"},"deployment_stage":{"state":"value_present","value":{"kind":"structured","data":{"classification":"pilot","answer":"The system was used in a pilot. Energy Trust offered the service to existing Nest owners in a randomized pilot in summer 2016 and winter 2016-17.","scope":"The period and activity described in the case."}},"provenance":{"kind":"source_review","basis":"Editorial assignment.","record_fields":["account","evidence"],"source_refs":["AIBD-0732-source-0001"],"reviewed_on":"2026-10-29"},"review_state":"reviewed","coverage":"complete","display":{"answer":"The system was used in a pilot. Energy Trust offered the service to existing Nest owners in a randomized pilot in summer 2016 and winter 2016-17.","inferred":false}},"economics[].amount":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].costs[]":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].counterfactual":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].currency_price_basis":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].gross_net":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].measure_type":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].period_unit":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].realization":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].recipient_payer":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].return_payback":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"economics[].valuation_method":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"monetary observations"},"evaluations[].ai_uplift":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].comparator":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].design":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].effect":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].exposure":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].id":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].measurement_method":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].metric":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].reproduction_materials":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].setting_sample":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"evaluations[].uncertainty_limitations":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"evaluations"},"external_references[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"follow_up[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"human_oversight":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"id":{"state":"value_present","value":{"kind":"record_fields","fields":{"id":"AIBD-0732"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["id"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"infrastructure_dependencies[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].beneficiaries":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].beneficiary_count":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].benefit_type":{"state":"value_present","value":{"kind":"record_fields","fields":{"benefit_type":"Reduced Carbon Emissions"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["benefit_type"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"outcomes[].claim":{"state":"value_present","value":{"kind":"record_fields","fields":{"account":"Nest Seasonal Savings is a service for existing Nest thermostats that makes small changes to setpoints and schedules over three weeks. Energy Trust of Oregon offered it with CLEAResult and Nest in summer 2016 and winter 2016-17. Energy Trust paid Nest for each customer who opted in. Thermostats were randomly assigned to an offer group or a control group, and 6,716 thermostats opted in for winter. Apex Analytics and Demand Side Analytics checked Nest's savings analysis and ran their own billing analysis. They reported on 22 November 2017 that heating runtime fell by 4.75%, about 18 therms per opted-in thermostat. Summer cooling savings were only 4 kWh per thermostat. Over half of the surveyed participants noticed the temperature changes, and a third of those believed that the changes made their homes less comfortable. The evaluators recommended that Energy Trust consider offering the service in winter only. The report does not say whether the optimizations learn from data.","benefit_type":"Reduced Carbon Emissions"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["account","benefit_type"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"outcomes[].distribution":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].duration":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].id":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].stakeholder_group":{"state":"value_present","value":{"kind":"record_fields","fields":{"ratings":[{"group":"personal","depth":1,"reason":"Each opted-in thermostat saved about 18 therms of gas heating over the winter."},{"group":"societal","depth":1,"reason":"Opted-in homes with gas furnaces together saved 110,404 therms over the winter."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["ratings"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"outcomes[].status":{"state":"value_present","value":{"kind":"record_fields","fields":{"benefit_status":"reported"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["benefit_status"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"outcomes[].tradeoffs":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"outcomes[].unexpected":{"state":"value_present","value":{"kind":"record_fields","fields":{"unexpected":false,"purpose":"Nest Labs built Nest Seasonal Savings to make small setpoint and schedule changes on Nest thermostats that save energy without occupants noticing."}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["unexpected","purpose"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"places[]":{"state":"value_present","value":{"kind":"record_fields","fields":{"location":"Oregon, United States","developer_country":"United States","deployer_country":"United States"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["location","developer_country","deployer_country"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"purpose":{"state":"value_present","value":{"kind":"record_fields","fields":{"purpose":"Nest Labs built Nest Seasonal Savings to make small setpoint and schedule changes on Nest thermostats that save energy without occupants noticing."}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["purpose"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"record_dates":{"state":"value_present","value":{"kind":"record_fields","fields":{"date_observed":"2017-01-01","date_basis":"event","date_precision":"year","revisions":[{"date":"2026-10-31","change":"Added the record from the report of Apex Analytics and Demand Side Analytics.","source":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","editor":"AIBD"}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["date_observed","date_basis","date_precision","revisions"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"replication.attempts[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"replication.conditions":{"state":"value_present","value":{"kind":"record_fields","fields":{"replication":{"produced_by":["Nest applied a series of small setpoint and schedule changes over three weeks.","Customers could override any change or opt out at any time."],"must_hold":["The heating system runs on a schedule set on the thermostat.","Occupants accept small temperature changes without overriding them."],"echoes":[]}}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["replication"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"revision_history[]":{"state":"value_present","value":{"kind":"record_fields","fields":{"revisions":[{"date":"2026-10-31","change":"Added the record from the report of Apex Analytics and Demand Side Analytics.","source":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","editor":"AIBD"}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["revisions"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"sector":{"state":"value_present","value":{"kind":"record_fields","fields":{"domain":"Energy (residential efficiency)"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["domain"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"sources[].access_version":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"sources[].citation_locator":{"state":"value_present","value":{"kind":"record_fields","fields":{"evidence":[{"kind":"evaluation report","citation":"Apex Analytics LLC and Demand Side Analytics. Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation. 22 November 2017.","title":"Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation","url":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","date":"2017-11-22","written_by":"evaluator","quote":"The Nest Seasonal Savings program showed minor summer season cooling savings of only 4 kWh per opt‐in thermostat, while winter heating seasonal savings were significant – approximately 18 therms per opt‐in thermostat over the course of the 2016/2017 winter season."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["evidence"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"sources[].id":{"state":"value_present","value":{"kind":"identifiers","identifiers":["AIBD-0732-source-0001"],"role":"Existing evidence items, in their original order"},"provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"review_state":"record_mapped","coverage":"complete"},"sources[].language":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"sources[].relationship":{"state":"value_present","value":{"kind":"record_fields","fields":{"evidence":[{"kind":"evaluation report","citation":"Apex Analytics LLC and Demand Side Analytics. Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation. 22 November 2017.","title":"Energy Trust of Oregon Nest Thermostat Seasonal Savings Pilot Evaluation","url":"https://www.energytrust.org/documents/nest-thermostat-seasonal-savings-pilot-evaluation/","date":"2017-11-22","written_by":"evaluator","quote":"The Nest Seasonal Savings program showed minor summer season cooling savings of only 4 kWh per opt‐in thermostat, while winter heating seasonal savings were significant – approximately 18 therms per opt‐in thermostat over the course of the 2016/2017 winter season."}]}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["evidence"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"sources[].upstream_sources":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"strategic_assessments[]":{"state":"unresolved","review_state":"not_assessed","coverage":"partial","family":"strategic assessments"},"summary":{"state":"value_present","value":{"kind":"record_fields","fields":{"summary":"In a randomized pilot, Nest Seasonal Savings cut heating runtime by 4.75%, about 18 therms per opted-in thermostat over winter 2016-17. Summer cooling savings were 4 kWh.","account":"Nest Seasonal Savings is a service for existing Nest thermostats that makes small changes to setpoints and schedules over three weeks. Energy Trust of Oregon offered it with CLEAResult and Nest in summer 2016 and winter 2016-17. Energy Trust paid Nest for each customer who opted in. Thermostats were randomly assigned to an offer group or a control group, and 6,716 thermostats opted in for winter. Apex Analytics and Demand Side Analytics checked Nest's savings analysis and ran their own billing analysis. They reported on 22 November 2017 that heating runtime fell by 4.75%, about 18 therms per opted-in thermostat. Summer cooling savings were only 4 kWh per thermostat. Over half of the surveyed participants noticed the temperature changes, and a third of those believed that the changes made their homes less comfortable. The evaluators recommended that Energy Trust consider offering the service in winter only. The report does not say whether the optimizations learn from data."}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["summary","account"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"systems[].autonomy_permissions":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].component_role":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].deployment_configuration":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].inputs_outputs":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].model_name":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].model_version":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"systems[].product_name":{"state":"value_present","value":{"kind":"record_fields","fields":{"system":"Nest Seasonal Savings (setpoint and schedule optimization service for Nest thermostats)"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["system"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"systems[].provider":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"taxonomy_crosswalks[]":{"state":"unresolved","provenance":{"kind":"curatorial","basis":"Editorial assignment.","record_fields":[],"source_refs":[]},"reason":"This is an explicit unresolved assignment: the sources on record do not settle this question.","review_state":"not_assessed","coverage":"partial"},"title":{"state":"value_present","value":{"kind":"record_fields","fields":{"title":"Evaluators for Energy Trust of Oregon confirm that Nest Seasonal Savings saved about 18 therms per enrolled thermostat in winter 2016-17","headline":"*Nest Seasonal Savings* trims winter heating in Oregon homes"}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["title","headline"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"},"version":{"state":"value_present","value":{"kind":"identifiers","identifiers":["874e30c7369c3e783042c742f50e23ecc8d0ad9be448789a666327e056146058"],"role":"SHA-256 of the complete public record and its assessments"},"provenance":{"kind":"curatorial","basis":"SHA-256 of the public record, its assessments, and its displayed answers and notes, excluding its own identifier and the derived coverage summary.","record_fields":[],"source_refs":[]},"review_state":"record_mapped","coverage":"complete"},"workflow":{"state":"value_present","value":{"kind":"record_fields","fields":{"account":"Nest Seasonal Savings is a service for existing Nest thermostats that makes small changes to setpoints and schedules over three weeks. Energy Trust of Oregon offered it with CLEAResult and Nest in summer 2016 and winter 2016-17. Energy Trust paid Nest for each customer who opted in. Thermostats were randomly assigned to an offer group or a control group, and 6,716 thermostats opted in for winter. Apex Analytics and Demand Side Analytics checked Nest's savings analysis and ran their own billing analysis. They reported on 22 November 2017 that heating runtime fell by 4.75%, about 18 therms per opted-in thermostat. Summer cooling savings were only 4 kWh per thermostat. Over half of the surveyed participants noticed the temperature changes, and a third of those believed that the changes made their homes less comfortable. The evaluators recommended that Energy Trust consider offering the service in winter only. The report does not say whether the optimizations learn from data.","replication":{"produced_by":["Nest applied a series of small setpoint and schedule changes over three weeks.","Customers could override any change or opt out at any time."],"must_hold":["The heating system runs on a schedule set on the thermostat.","Occupants accept small temperature changes without overriding them."],"echoes":[]}}},"provenance":{"kind":"legacy_record","basis":"Editorial assignment.","record_fields":["account","replication"],"source_refs":[]},"review_state":"record_mapped","coverage":"partial"}},"summary":{"total":91,"addressed":91,"known":29,"reviewed":2,"reviewed_complete":2,"reviewed_partial":0,"record_mapped":27,"review_not_assessed":62,"not_assessed":0,"complete":false,"by_state":{"value_present":29,"not_reported":0,"unresolved":62,"not_assessed":0,"not_applicable":0,"withheld":0,"source_unavailable":0}}},"presentation_version":"e49c2c3f64552b4d96cf0027742bfd53b053436542e043d676cbb038cb553687"}
