In the simplest terms, HVAC units are really big air conditioners, not dissimilar to the air conditioning unit in your car, apartment, or house.
The efficiency of a precision air conditioning system is based on two things:
The degree of temperature control
The ability of the system to get the conditioned air to the units of hardware that need cooling
The following figure shows an HVAC unit and controls.
The basic premise of a chilled liquid system is that air goes into the unit through its intake (at the top of most HVAC units) and is passed through a set of filters, some of which ...