Uniformat D3040

Plate heat exchanger

Also called HX, PHE, heat exchanger

• Confidence C
• Version 0.3.0 (permanent link)
• Reviewed 2026-10-22

This is version 0.3.0. The latest is 0.4.0.

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

• 35 years · CNA e-Tool Estimated Useful Life Table, p11 · HUD CNA 3.4.2.1.12 “Heat Exchanger - Centralized” — U.S. Department of Housing and Urban Development (planning life)
  Same life for family and elderly properties. US multifamily housing. HUD's row is a central heat exchanger and does not name the type.
• 20 years · General depreciation rates (IR265), July 2021, p44 · BOIL “Heat exchangers (not stainless steel)” — Inland Revenue (Te Tari Taake), New Zealand (accounting life)
  Printed page 44. Heat exchangers of any type, not stainless steel. Boilers and heaters category. Printed DV 10%, SL 7%. Tax depreciation lives set by the Commissioner of Inland Revenue for New Zealand income tax, not engineering or asset-management lives; they are banded and often short (e.g. reticulation piping 25 years). The July 2021 edition was the newest PDF reachable; the online Depreciation Rate Finder may hold later determinations.
• 25 years · General depreciation rates (IR265), July 2021, p44 · BOIL “Heat exchangers (stainless steel)” — Inland Revenue (Te Tari Taake), New Zealand (accounting life)
  Printed page 44. Stainless steel heat exchangers of any type (plate heat exchangers are usually stainless). Boilers and heaters category. Printed DV 8%, SL 6%. Tax depreciation lives set by the Commissioner of Inland Revenue for New Zealand income tax, not engineering or asset-management lives; they are banded and often short (e.g. reticulation piping 25 years). The July 2021 edition was the newest PDF reachable; the online Depreciation Rate Finder may hold later determinations.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

4 tasks in 1 work order.

1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
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.
• 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.

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

Cite this

Citation

unfinished.one (2026). Plate heat exchanger, v0.3.0. https://unfinished.one/c/heat-exchanger-plate/v/0.3.0

BibTeX

@misc{unfinished_heat_exchanger_plate_0_3_0,
  title = {Plate heat exchanger},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.3.0},
  url = {https://unfinished.one/c/heat-exchanger-plate/v/0.3.0},
  note = {CC BY 4.0}
}

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