SKD
4-Way Square Diffuser
DAG
Double-Deflection Air Grille
SLD
Linear slot diffuser
STD
AHRI 1350 certified AHU
HEX
AHU Heat Exchanger
EHT
AHU Electric Heater
S-VAV-S.../RS...
VAV BOX AHRI 880
DRC
AHU Run Around Coil
WHC
AHU Water heating Coil
DHU
AHU Desiccant Wheel
DDHU
DRY ROOM AHU – Desiccant Wheel
Fire fighting valves and accessories
Fire fighting valves and accessories (UL/FM)