3 Types of Cooling and Heating Loads to Know About

You would be surprised at the importance of properly sizing a new residential HVAC system. If the cooling or heating system is undersized or oversized, it will waste energy and underperform. A basic element of HVAC sizing is calculating cooling and heating loads, or the needs and requirements of your home. There are three main types of loads.

Design Load

This cooling or heating load is connected to designated design conditions in your home. For example, pre-determined summer and winter temperatures considered usual for the sort of load your HVAC system will have to deal with during cold or hot weather. For certain areas and climates, the design temperature might be 84 degrees in the summer and 18 in the winter. Various factors, such as your home’s size, layout and energy efficiency, should be considered in determining how much heating or cooling will be needed to bring your home to a set comfortable temperature during outside design conditions.

Extreme Load

Extreme loads occur during the hottest or coldest days of the year. A skilled HVAC installation technician would not recommend a heating or cooling system based on an extreme load. This would render the system oversized for all its duties, resulting in the many negative consequences of an oversized HVAC system.

Partial Load

In all homes, the partial load is the most common requirement for your cooling or heating system. Even during a hot or cold day, most of the time the temperature is either building up to a peak, or settling back from that highest or lowest temperature. Similarly, during milder weather, or in the spring or fall, design temperatures will rarely be reached. This means that a standard HVAC system will have too much capacity during much of a day or a year. In recent years, fortunately, HVAC technology has had advancements in variable-speed and multi-level functioning, meaning systems can adapt their running level to current conditions.


For more information on how cooling and heating loads affect performance and energy efficiency in your Dallas area home, contact us at Airtron Heating & Air Conditioning.

Call Now Button