Uniformat D5090

Natural gas generator

A natural gas generator lasts about 22 years, the median of 2 published sources, which state 19–25 years.

Also listed as Generator, natural gas standby, gas generator

• Confidence C
• Version 0.6.0 (permanent link)
• Reviewed 2026-10-23

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.

Work out when yours is due for replacement

Basis

• 25 years · CNA e-Tool Estimated Useful Life Table, p15 · HUD CNA 3.6.2.4 “Emergency/auxiliary generator” — U.S. Department of Housing and Urban Development (planning life)
  Same life for family and elderly properties. US multifamily housing. HUD's row does not name the fuel.
• 19 years · Circular No. A-76 Revised Supplemental Handbook: Performance of Commercial Activities, Appendix 3 Useful Life and Disposal Value (March 1996), p53 · FSC 6115 “Generators and Generator Sets, Electrical, Expected Useful Life 19 (years)” — Executive Office of the President, Office of Management and Budget (values estimated by the Defense Logistics Agency) (accounting life)
  Printed page 49. All electrical generator sets, any fuel and duty (not specific to standby service).

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

16 tasks in 3 work orders. Intervals that fall due together are one visit: the annual visit also covers the monthly and semi-annual tasks.

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

Months from the schedule start. 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

• Every source here is a published planning, design or accounting life. None is observed replacement data.

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

Cite this

Citation

unfinished.one (2026). Generator, natural gas standby, v0.6.0. https://unfinished.one/c/generator-natural-gas/v/0.6.0

BibTeX

@misc{unfinished_generator_natural_gas_0_6_0,
  title = {Generator, natural gas standby},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.6.0},
  url = {https://unfinished.one/c/generator-natural-gas/v/0.6.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.6.0, 0.4.0, 0.3.0, 0.2.0, 0.1.0