Outlined below are the most commonly used hvac equipment symbols and their meanings.
Click here to view easy-to-use compiled charts of these symbols.
fcu
Fan Coil Unit is a device that heats or cools a space using a coil and a fan.
ahu
Air Handling Unit (AHU) is a device used to circulate air in an hvac system.
chiller
Chiller is a device that removes heat from a liquid by making use of the VCR cycle.
pump
In hvac systems pumps are used to pressurize and movie liquid along hydronic lines.
compressor
In hvac systems, the compressor compresses the refrigerant.
fan
Different types of fans are used in hvac systems. Each performs a different function.
cooling coil
Cooling coils remove heat from the air.
silencer
Silencers reduce airborne noise.
muffler
Mufflers in hvac systems reduce noise by dampening gas pulsations in compressor suction and discharge lines.
air filter
Air filter collects dust and debris while letting air pass through.
dx unit
A direct expansion air conditioning unit(DX unit), cools air using a refrigerant liquid.
dryer
The dryer in hvac systems absorb extra moisture.
condenser
The condenser is the component of the hvac system that removes heat from the refrigerant.
temperature sensor
cooling tower
Cooling towers in hvac systems remove heat from water that is pumped to it from the condenser.
solenoid valve
Solenoid valve is an electromechanical valve that can be used to turn refrigerant flow on and off.
gate valve
Gate valves are used to fully open or close flow.
globe valve
Globe valves can be used to regulate flow.
butterfly valve
Butterfly valves are used to regulate flow.
Check valve
Check valves ensure that flow occurs only in one direction.