{"id":"thermostat","version":"0.2.0","classification":{"uniformat":"D3060"},"names":["Thermostat"],"aliases":["stat","tstat","programmable thermostat"],"service_life":{"median_years":17.5,"range_years":[15,20],"range_basis":"source_spread"},"pm_tasks":[{"task":"Pneumatic: listen and feel for air leaks at tubing joints","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":127,"checklist":"CTRL-END-01-01Y End Devices (pneumatic)"},{"task":"Pneumatic: check set point against the sequence of operation","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":127,"checklist":"CTRL-END-01-01Y End Devices (pneumatic)"},{"task":"Pneumatic: check unit over its full range with a squeeze bulb and gauge","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":127,"checklist":"CTRL-END-01-01Y End Devices (pneumatic)"},{"task":"Pneumatic: replace air filters at sensors, controllers and thermostats","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":127,"checklist":"CTRL-END-01-01Y End Devices (pneumatic)"},{"task":"Electronic: check sensor is mounted securely and unobstructed","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":128,"checklist":"CTRL-END-01-01Y End Devices (electronic)"},{"task":"Electronic: check electrical connections","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":128,"checklist":"CTRL-END-01-01Y End Devices (electronic)"},{"task":"Electronic: check voltage or resistance against spec; calibrate or replace","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":128,"checklist":"CTRL-END-01-01Y End Devices (electronic)"},{"task":"Electronic: run device through its range; check equipment responds","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":128,"checklist":"CTRL-END-01-01Y End Devices (electronic)"},{"task":"Electronic: compare BAS reading with field observation","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":128,"checklist":"CTRL-END-01-01Y End Devices (electronic)"}],"basis":[{"type":"public_document","life_type":"planning","title":"CNA e-Tool Estimated Useful Life Table","by":"U.S. Department of Housing and Urban Development","url":"https://www.hud.gov/sites/documents/eul_for_cna_e_tool.pdf","page":13,"code":"HUD CNA 3.4.3.2.1","label":"Dwelling/common area thermostat","years":[15,20],"note":"Family properties 15 years, elderly 20. US multifamily housing."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Only one source so far: HUD planning lives for US multifamily housing. Canadian and observed sources are needed.","Written for GSA contracted O&M in US federal buildings; job plans are generic and defer to manufacturer instructions, and the fire extinguisher plans only point to NFPA 10."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/thermostat","versioned_url":"https://unfinished.one/c/thermostat/v/0.2.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Thermostat, v0.2.0. https://unfinished.one/c/thermostat/v/0.2.0"}