{"id":"rtu-gas-electric","version":"0.1.0","classification":{"uniformat":"D3050","omniclass":"23-33 25 00"},"names":["Rooftop unit, gas heat / DX cooling"],"aliases":["RTU","packaged rooftop unit"],"service_life":{"median_years":15,"range_years":[12,20],"modifiers":[{"factor":"coastal salt exposure","effect_years":-3},{"factor":"PM completion above 90%","effect_years":2}]},"pm_tasks":[{"task":"Replace filters","frequency":"P3M","trade":"HVAC tech","labour_h":0.5,"criticality":"high"},{"task":"Inspect heat exchanger, test combustion","frequency":"P1Y","trade":"Gas fitter","labour_h":1.5,"criticality":"high"},{"task":"Verify economizer operation","frequency":"P6M","trade":"Controls tech","labour_h":0.5,"criticality":"medium"}],"basis":[{"type":"expert_estimate","by":"unfinished.one editors"}],"confidence":{"grade":"D","sample_size":null},"open_questions":["PLACEHOLDER ENTRY: values are illustrative and not yet sourced.","Does life differ for units under 10 tons vs over 25 tons?"],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-20","canonical_url":"https://unfinished.one/c/rtu-gas-electric","versioned_url":"https://unfinished.one/c/rtu-gas-electric/v/0.1.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Rooftop unit, gas heat / DX cooling, v0.1.0. https://unfinished.one/c/rtu-gas-electric/v/0.1.0"}