Air Handler Closet Retrofit Description Guide describing repair and reconfiguration of air handler closet and platform when replacing air handler.
Compact Air Distribution Description Guide describing design and installation of compact duct systems for central heating and cooling systems.
Transfer Grilles Description Guide describing how to install transfer grilles in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.