Air Handler Closet Retrofit Description Guide describing repair and reconfiguration of air handler closet and platform when replacing air handler.
Common Exhaust Duct Not Shared by Fans in Separate Dwellings Description Guide describing correct ducting for exhaust fans.
Compact Air Distribution Description Guide describing design and installation of compact duct systems for central heating and cooling systems.
Existing HVAC System Upgrade or Expansion Description Guide describing how to upgrade or expand an existing HVAC system.