Compact Air Distribution Description Guide describing design and installation of compact duct systems for central heating and cooling systems.
ECM Air Handler Fans Description Guide describing the use of electronically commutated motors (ECMs) in HVAC central air handler fans to reduce power consumption compared to a single-stage fan motor.
Ground-Source Heat Pumps Description Guide describing ground-source (geothermal) heat pumps including an overview of technology and guidance on compliance and installation.