Trane TRG-TRC014-EN Constant Volume-MultipleSpaces, What Is Variable Air Volume?, period one

period one

What Is Variable Air Volume?

notes

Constant Volume–Multiple Spaces

single thermostat	I’m
	fine.
It’s stuffy
in here!	I’m
I’m
	freezing!
hot!

Figure 6

However, because this type of system can respond to the demands of only one thermostat, it can serve only those building spaces with similar cooling requirements. If a building has many spaces with diverse cooling needs, each must be served by its own system.

Constant Volume–Multiple Spaces

80°F

[26.7°C]		65°F
		[18.3°C]
55°F	air mixing
[12.8°C]
55°F		65°F
[12.8°C]		[18.3°C]
	reheat coil	Figure 7

Other constant-volume system designs can serve the cooling requirements of more than one space with a central fan and cooling coil. However, to do so, the cool primary air must be either reheated or mixed with warm air to produce the supply temperatures needed to balance the various space cooling loads.

4 TRG-TRC014-EN