Uniformat D3020

Boiler, hot water, non-condensing

Also called atmospheric boiler, cast iron boiler, hot water boiler

• Confidence C
• Version 0.2.0 (permanent link)
• Reviewed 2026-10-21

Service life

Years in service. One stated life so far; the band will widen as sources are added.

Basis

• 25 years · CNA e-Tool Estimated Useful Life Table, p10 · HUD CNA 3.4.1.2.9 “Boilers, Gas Fired, Sectional” — U.S. Department of Housing and Urban Development (planning life)
  Same life for family and elderly properties. US multifamily housing. HUD does not separate condensing from non-condensing boilers; its gas-fired sectional and atmospheric rows describe non-condensing types. Its oil/gas/dual-fuel rows (30 years low MBH, 40 years high MBH) are not used because they do not say which kind.
• 25 years · CNA e-Tool Estimated Useful Life Table, p10 · HUD CNA 3.4.1.2.12 “Boilers, Gas Fired Atmospheric” — U.S. Department of Housing and Urban Development (planning life)
  Same life for family and elderly properties. US multifamily housing.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

35 tasks in 4 work orders. Intervals that fall due together are one visit: the annual visit also covers the monthly tasks.

1. 1Monthly
2. 2Monthly
3. 3Monthly
4. 4Monthly
5. 5Monthly
6. 6Monthly
7. 7Monthly
8. 8Monthly
9. 9Monthly
10. 10Monthly
11. 11Monthly
12. 12Annual

Months from the schedule start. Daily and weekly rounds run in between. Download the tasks as CSV for a CMMS, or ask the MCP tool get_pm_schedule for dated visits.

Frequencies are ISO 8601 durations in the data (P3M = every 3 months).

Open questions

• Only one source so far: HUD planning lives for US multifamily housing. Canadian and observed sources are needed.

Know the answer? Send it with a source to [email protected].

Cite this

Citation

unfinished.one (2026). Boiler, hot water, non-condensing, v0.2.0. https://unfinished.one/c/boiler-hw-noncondensing/v/0.2.0

BibTeX

@misc{unfinished_boiler_hw_noncondensing_0_2_0,
  title = {Boiler, hot water, non-condensing},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.2.0},
  url = {https://unfinished.one/c/boiler-hw-noncondensing/v/0.2.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.2.0, 0.1.0