Meanings of commonly used HVAC equipment symbols

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 Symbol

fcu

Fan Coil Unit is a device that heats or cools a space using a coil and a fan.

AHU symbol

ahu

Air Handling Unit (AHU) is a device used to circulate air in an hvac system.

chiller symbol

chiller

Chiller is a device that removes heat from a liquid by making use of the VCR cycle.

pump symbol

pump

In hvac systems pumps are used to pressurize and movie liquid along hydronic lines.

compressor symbol

compressor

In hvac systems, the compressor compresses the refrigerant.

fan symbol

fan

Different types of fans are used in hvac systems. Each performs a different function.

cooling coil symbol

cooling coil

Cooling coils remove heat from the air.

silencer symbol

silencer

Silencers reduce airborne noise.

muffler symbol

muffler

Mufflers in hvac systems reduce noise by dampening gas pulsations in compressor suction and discharge lines.

air filter symbol

air filter

Air filter collects dust and debris while letting air pass through.

DX unit symbol

dx unit

A direct expansion air conditioning unit(DX unit), cools air using a refrigerant liquid.

dryer symbol

dryer

The dryer in hvac systems absorb extra moisture.

condenser symbol

condenser

The condenser is the component of the hvac system that removes heat from the refrigerant.

temperature sensor symbol

temperature sensor

cooling tower symbol

cooling tower

Cooling towers in hvac systems remove heat from water that is pumped to it from the condenser.

solenoid valve symbol

solenoid valve

Solenoid valve is an electromechanical valve that can be used to turn refrigerant flow on and off.

gate valve symbol

gate valve

Gate valves are used to fully open or close flow.

globe valve symbol

globe valve

Globe valves can be used to regulate flow.

butterfly valve symbol

butterfly valve

Butterfly valves are used to regulate flow.

check valve symbol

Check valve

Check valves ensure that flow occurs only in one direction.