3 Types of Cooling and Heating Loads You Must Know About

You might be surprised at the importance of properly sizing a new residential HVAC system. If a cooling or heating system is over-sized or undersized, it is set to waste energy and under perform. A key component of HVAC sizing is calculating its cooling and heating loads, or the needs and requirements of a home. Here are the three main types of loads.

Design Load

The cooling or heating load is distinctly connected to pre-set design conditions in your home – or in other words, pre-determined summer and winter temperatures that are considered typical for the sort of load your HVAC system will have to contend with during cold or hot weather. For a certain area and climate, the temperature might be 84 degrees in the summer and 18 in the winter. Certain factors, including your home’s size, layout and energy efficiency, should be considered in determining how much cooling or heating will be needed to bring your home to a pre-set comfortable temperature during outside design conditions.

Extreme Load

Extreme loads will occur during the coldest or hottest days of the year. A knowledgeable HVAC installation technician will never recommend a heating or cooling system based on an extreme load. This would mean that the system would over-sized for all other times, resulting the many negative consequences of an over-sized HVAC system.

Partial Load

In each home, the partial load is the most common requirement for any cooling or heating system. Even during a cold or hot day, much of the time the temperature is either increasing to a peak, or digressing back from the highest or lowest temperature. Similarly, when it’s milder outside, or in the spring or fall, design temperatures will not often be reached. This means that a standard HVAC system will operate on too much capacity during the greater part of a day or a year. Fortunately, HVAC technology has seen advancements in recent years in variable-speed and multi-level functioning, meaning systems can now adapt their running level to current conditions.

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


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