2,400+ Definitions
HVAC GLOSSARY
Every HVAC term, acronym, and industry phrase — defined in plain English.
Duct System Design
Duct System Design involves sizing and routing air distribution pathways…
Duct Tee
A duct tee is a T-shaped fitting used in HVAC…
Duct Transition
A duct transition is a fabricated fitting within an HVAC…
Duct Velocity
Duct velocity is the speed at which air moves through…
Ductless Installation
A ductless installation involves mounting an indoor wall unit connected…
Ductwork
Ductwork is the network of metal, fiberglass, or flexible conduit…
dV/dt Filter
An output filter added to a VFD to slow the…
DX Coil
A DX coil, or direct expansion coil, is a cooling…
Dynamic Braking Resistor
A power resistor connected across the DC bus of a…
Dynamic Glass
Dynamic glass is responsive glazing technology that automatically adjusts light…