Uniformat D3020
Furnace, gas-fired
Also called furnace, forced air furnace, gas furnace
Service life
Years in service. The band runs from the shortest to the longest life the sources state, so it shows how much they disagree, not how long 80% of units last. The line is the median of the stated lives.
Basis
- 20 years · CNA e-Tool Estimated Useful Life Table, p12 · HUD CNA 3.4.3.1.4 “Gas furnace/air handler” — U.S. Department of Housing and Urban Development (planning life)Same life for family and elderly properties. US multifamily housing. The municipal rows say furnace without naming the fuel.
- 15 years · The Blue Mountains: POL.COR.19.04 Tangible Capital Assets Policy, p11 · “Furnace” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
- 15 years · Grey Highlands: By-law No. 2026-052, Tangible Capital Asset Policy A09-F-03, p11 · “Furnace” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
- 15–25 years · Meaford: By-law 2020-83, Tangible Capital Asset Policy, Appendix A Estimated Useful Lives, p17 · “HVAC - Furnace” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
How sources are chosen and recorded: sourcing policy.
Municipal accounting lives for HVAC (D30)
26 municipal policies from Ontario set a life for HVAC as a whole, from 22 distinct tables: 10–50 years, median 20. These are amortization periods chosen for accounting, not measured lives, and they describe the system rather than this component.
Years. Each dot is one stated life and each bar a stated range; equal values stack. The dashed line is the median. Policies that copy the same table count once.
All 35 stated lives
| Municipality | As written | Years | Source |
|---|---|---|---|
| Trent Lakes | HVAC systems | 10 | p10 · 2009 |
| Grey Highlands | Furnace | 15 | p11 · 2026 |
| Kapuskasing | HVAC Systems | 15 | p14 · 2009 |
| Sarnia | HVAC | 15 | p1 |
| The Blue Mountains | Furnace | 15 | p11 · 2019 |
| Meaford | HVAC - Furnace | 15–25 | p17 · 2020 |
| Amherstburg | Mechanical/Electrical - HVA, Lighting, Security systems, Electrical Panel | 20 | p8 · 2026 |
| Amherstburg | Arena - Air Conditioner, Brine Chillers, Compressors, Dehumidifiers | 20 | p8 · 2026 |
| Chapple | Building Improvements - HVAC Systems | 20 | p1 |
| Greater Napanee | E20 Mechanical - Boilers, Fire Panel/Alarm, Unit Heaters, HVAC | 20 | p16 · 2012 |
| Grey Highlands | HVAC | 20 | p11 · 2026 |
| Kenora | Buildings - Mechanical System | 20 | p15 · 2026 |
| London | Building Components - Services (HVAC, lighting, communication, plumbing etc.) | 20 | p2 · 2023 |
| Meaford | HVAC - Air Distribution | 20 | p17 · 2020 |
| Prince Edward | Buildings - HVAC | 20 | p34 · 2022 |
| Rainy River | Building Improvements - HVAC Systems/Generator | 20 | p11 · 2010 |
| Severn | Building Components - Air Conditioner | 20 | p400 · 2019 |
| The Blue Mountains | Boiler | 20 | p11 · 2019 |
| Welland | HVAC/Electrical/Mechanical | 20 | p8 · 2021 |
| Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table | HVAC Systems | 20–25 | p5, p4, p6, p5 |
| Orillia | Facility - HVAC, Boiler | 20–25 | p19 |
| Amherstburg | Arena - Refrigeration Condenser, Scoreboard, Sound System | 25 | p8 · 2026 |
| Greater Madawaska, Quinte West · same table | HVAC | 25 | p17, p38 · 2025 |
| Greater Napanee | E25 Plant Mechanical & Electrical | 25 | p16 · 2012 |
| Grey Highlands | Boiler | 25 | p11 · 2026 |
| Kingston | Mechanical Equipment | 25 | p15 · 2016 |
| Kirkland Lake | Buildings and Improvements - Mechanical/Electrical | 25 | p10 · 2020 |
| Orillia | Arena - Condenser/refrigeration, compressor, HVAC, heating units | 25 | p19 |
| Severn | Building Components - Furnace/Heating System | 25 | p400 · 2019 |
| Severn | Building Components - Condenser | 25 | p400 · 2019 |
| The Blue Mountains | HVAC System | 25 | p11 · 2019 |
| Greater Napanee | E30 Chillers, Rink Piping, Fuel Storage Tanks | 30 | p16 · 2012 |
| Simcoe | Mechanical | 30 | p19 · 2025 |
| Brockton | Mechanical/Electrical (Heating/Cooling System, Refridgerating System) | 40 | p2 · 2009 |
| Meaford | HVAC - System | 50 | p17 · 2020 |
Each row was matched to its page automatically: the label and the number appear in the text of the cited page. An editor has not yet compared every row with the table, so follow the page link before relying on one. About the policies · All approved rows as JSON
Preventive maintenance
No maintenance tasks are sourced for this component yet.
Open questions
- HUD gives planning lives for US multifamily housing; the municipal rows are Ontario accounting lives. Neither is observed replacement data.
- No preventive maintenance tasks are sourced yet.
Know the answer? Send it with a source to [email protected].
Cite this
Citation
unfinished.one (2026). Furnace, gas-fired, v0.1.0. https://unfinished.one/c/furnace-gas/v/0.1.0BibTeX
@misc{unfinished_furnace_gas_0_1_0,
title = {Furnace, gas-fired},
author = {{unfinished.one}},
year = {2026},
version = {0.1.0},
url = {https://unfinished.one/c/furnace-gas/v/0.1.0},
note = {CC BY 4.0}
}Licence CC BY 4.0 · How to cite · JSON · Versions: 0.1.0