heating, plumbing, ventilation line icons signs set. collection of heating, plumbing, ventilation, hvac, system

vector sign icon heating plumbing ventilation hvac system installation maintenance repair replacement energy efficiency sustainability insulation air flow duct filter thermostat boiler furnace radiator pump valve pipe faucet sink toilet shower bathtub drain septic sewage grease trap water quality pressure filtration purification dehumidification humidification conditioning fan exhaust hood range fire safety code compliance inspection certification warranty emergency