Broad temperature variations between rooms and between stories in homes are a common concern regarding heating and cooling systems. Balancing the device is a concept used by heating and air conditioning (HVAC) contractors to describe the process of correcting temperature variations between locations. To achieve a fair temperature balance, an HVAC system that is properly sized and installed should only require slight adjustments. In practise, sizing and installation errors in HVAC systems are common, making balancing difficult.Do you want to learn more? Visit http://www.greenrealestatelaw.com/2011/06/geothermal-problems-could-shut-down-cooling-system-at-mission-critical-green-building
HVAC systems must follow a range of heating and cooling performance requirements. The heating efficiency standard of the International Residential Code (IRC) specifies that the device maintain a temperature in the home of at least 68 degrees Fahrenheit. The IRC does not have a cooling output level. The heating performance standard set by the National Association of Home Builders (NAHB) is 70 degrees Fahrenheit, and the cooling performance standard is 78 degrees Fahrenheit, or 15 degrees Fahrenheit below an outside air temperature of 95 degrees Fahrenheit. The temperature of the performance level is usually taken near the centre of the building, about five feet above the surface.
Different performance criteria can exist in different states or cities. The cooling efficiency minimum in Arizona is 78 degrees Fahrenheit, or 30 degrees below the outside air temperature. Every space in the house is normally subject to these national and local requirements. If the thermostat temperature is 78 degrees Fahrenheit in cooling mode, the temperature in any room regulated by that thermostat should be at least 78 degrees Fahrenheit. Typically, a one- or two-degree difference from the thermostat temperature is permitted.
Numerous factors influence juggling, which can vary depending on the time of day and the season of the year. Room position (south and west facing rooms can be more difficult to cool), window size, efficiency, and location, room size and ceiling height, size and location of supply and return registers, thermostat location, and location of the air handler relative to the room are all factors that affect balancing (the air handler must push air further through ducts in unconditioned space).