{"id":"water-source-heat-pump","version":"0.1.0","classification":{"uniformat":"D3050"},"names":["Water-source heat pump"],"aliases":["WSHP","geothermal heat pump"],"service_life":{"median_years":19,"range_years":[19,19],"range_basis":"source_spread"},"pm_tasks":[],"basis":[{"type":"public_document","life_type":"planning","title":"Energy Conservation Program: Energy Conservation Standards for Water-Source Heat Pumps (request for information), 85 FR 27929, May 12, 2020","by":"U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy","url":"https://www.govinfo.gov/content/pkg/FR-2020-05-12/pdf/2020-09415.pdf","page":11,"code":"H","label":"equipment lifetime on a retirement function in the form of a Weibull probability distribution, with a mean of 19 years","years":19,"note":"Printed page 27939. Direct match: commercial water-source heat pumps (water-to-air, under 135,000 Btu/h). Value from the July 2015 final rule, restated in this RFI."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Every source here is a published planning, design or accounting life. None is observed replacement data.","No preventive maintenance tasks are sourced yet."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-21","canonical_url":"https://unfinished.one/c/water-source-heat-pump","versioned_url":"https://unfinished.one/c/water-source-heat-pump/v/0.1.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Water-source heat pump, v0.1.0. https://unfinished.one/c/water-source-heat-pump/v/0.1.0"}