Small Tonnage Chiller (STC)

Small Tonnage Chillers (STCs) are one part of an overall heating, ventilation, and air conditioning (HVAC) system.

STCs produce chilled water (or glycol) by cooling the chilled water loop.

All STCs need a chilled water pump to move chilled water through their pipes. For some models, manufacturers offer a chilled water pump kit as part of the total package so that the customer need not buy
one separately.

STCs chill their water (or glycol) and reject the heat removed via one of two methods…

• Air cooled condensers
• Water cooled condensers

Although it will have a higher install cost, a chilled water system can often produce a healthier, more pleasant indoor environment than a packaged rooftop unit or DX split system because it offers…

• Better humidity control
• Better temperature control
• Better air quality
• Less ducted noise in the conditioned space