Credits EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 To determine the service life of a piece of HVAC equipment. Resource type Technical Guides Link http://www.ashrae.org/publications/page/158
