Design Condition

Air conditioning equipment is designed to operate at its rated capacity and efficiency at one set of design conditions. This design condition is generally considered to be at an outside temperature of 95 degrees Fahrenheit, and at an inside temperature of 80 degrees Fahrenheit, with a relative humidity of 50%.

When a piece of equipment is rated at 3 tons, it will perform at a 3- ton capacity or 36,000 Btu/hr under the stated conditions.

When these conditions change, so does the unit capacity, (net refrigerating effect).

1 ton of refrigeration = 12,000 Btu / Hr. 288,000 Btu / 24 Hr.
1 horsepower = 746 watts
3.413 Btu = 1 watt
1000 watts = 3,413 Btu

HVAC2000 Copyright © 1999/2000/2001/2002/2003/2004/2005/2006/2007/2008/2009/2010
All rights reserved / HVAC2000 went Online May 1999
E-Mail HVAC2000