{"id":"heat-exchanger-plate","version":"0.3.0","classification":{"uniformat":"D3040"},"names":["Plate heat exchanger"],"aliases":["HX","PHE","heat exchanger"],"service_life":{"median_years":25,"range_years":[20,35],"range_basis":"source_spread"},"pm_tasks":[{"task":"Clean and grease exposed bolt threads, guide bars and rollers","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":469,"checklist":"HVAC-HXR-01-01Y Plate and Frame Heat Exchanger"},{"task":"Check pressure and temperature gauges","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":470,"checklist":"HVAC-HXR-01-01Y Plate and Frame Heat Exchanger"},{"task":"Back flush and clean in place","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":470,"checklist":"HVAC-HXR-01-01Y Plate and Frame Heat Exchanger"},{"task":"Check unit for leaks","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":470,"checklist":"HVAC-HXR-01-01Y Plate and Frame Heat Exchanger"}],"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":11,"code":"HUD CNA 3.4.2.1.12","label":"Heat Exchanger - Centralized","years":35,"note":"Same life for family and elderly properties. US multifamily housing. HUD's row is a central heat exchanger and does not name the type."},{"type":"public_document","life_type":"accounting","title":"General depreciation rates (IR265), July 2021","by":"Inland Revenue (Te Tari Taake), New Zealand","url":"https://www.ird.govt.nz/-/media/project/ir/home/documents/forms-and-guides/ir200---ir299/ir265/ir265-2021.pdf","page":44,"code":"BOIL","label":"Heat exchangers (not stainless steel)","years":20,"note":"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."},{"type":"public_document","life_type":"accounting","title":"General depreciation rates (IR265), July 2021","by":"Inland Revenue (Te Tari Taake), New Zealand","url":"https://www.ird.govt.nz/-/media/project/ir/home/documents/forms-and-guides/ir200---ir299/ir265/ir265-2021.pdf","page":44,"code":"BOIL","label":"Heat exchangers (stainless steel)","years":25,"note":"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."}],"confidence":{"grade":"C","sample_size":null},"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."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/heat-exchanger-plate","versioned_url":"https://unfinished.one/c/heat-exchanger-plate/v/0.3.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Plate heat exchanger, v0.3.0. https://unfinished.one/c/heat-exchanger-plate/v/0.3.0"}