Building Materials & Life Expectancy
Heat-Recovery Ventilator: 20: Hot-Water and Steam-Radiant Boiler: 40: Humidifier: 12: Induction and Fan-Coil Units: 10 to 15: Chimney Cap (concrete) 100+ Chimney Cap (metal) 10 to 20: Chimney Cap (mortar) 15: Chimney Flue Tile: 40 to 120: Thermostats: 35: Ventilator: 7
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