{"id":"rtu-gas-electric","version":"0.2.0","classification":{"uniformat":"D3050"},"names":["Rooftop unit, gas heat / DX cooling"],"aliases":["RTU","packaged rooftop unit","gas electric RTU","rooftop unit"],"service_life":{"median_years":15,"range_years":[15,15],"range_basis":"source_spread"},"pm_tasks":[],"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":13,"code":"HUD CNA 3.4.3.1.11","label":"Package HVAC roof top","years":15,"note":"Same life for family and elderly properties. US multifamily housing. HUD's row covers packaged rooftop HVAC units without separating gas heat from heat pumps."}],"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.","No preventive maintenance tasks are sourced yet."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-21","canonical_url":"https://unfinished.one/c/rtu-gas-electric","versioned_url":"https://unfinished.one/c/rtu-gas-electric/v/0.2.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Rooftop unit, gas heat / DX cooling, v0.2.0. https://unfinished.one/c/rtu-gas-electric/v/0.2.0"}