5.3 : Heating, Cooling, and Ventilation Equipment




5.3.9 Major Commercial HVAC Equipment Lifetimes and Ages
Median
Equipment Type Lifetime
Air Conditioners
Through-the-Wall 15
Water-CooledPackage 24 (1)
Roof-Top 15
Chillers
Reciprocating 20
Centrifugal 25 (1)
Absorption 23
Heat Pumps
Air-to-Air 15
Water-to-Air 24 (1)
Furnaces (gas or oil) 18
Boilers (gas or oil)
Hot-Water 24 - 35
Steam 25 - 30
Unit Heaters
Gas-Fired or Electric 13
Hot-Water or Steam 20
Cooling Towers (metal or wood)
Metal 22 (1)
Wood 20
Note(s): 1) Data from 2005. All other data is from 1978.









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Sources:

ASHRAE, 2007 ASHRAE Handbook: HVAC Applications, Table 4, p. 36.3 for median service lifetimes