{"id":"heat-exchanger-plate","version":"0.4.0","classification":{"uniformat":"D3040"},"names":["Plate heat exchanger"],"aliases":["HX","PHE","heat exchanger"],"service_life":{"median_years":35,"range_years":[35,35],"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."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Only one source so far: HUD planning lives for US multifamily housing. Canadian and observed sources are needed.","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/0.4.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Plate heat exchanger, v0.4.0. https://unfinished.one/c/heat-exchanger-plate/v/0.4.0"}