Understanding Load Calculation for HVAC

February 15, 2013

When installing a new HVAC system in Longview, TX, a load calculation is used to determine the amount of energy required to maintain the specific environment at a steady, comfortable indoor temperature. An accurate load calculation, based on Manual J standards and done by a computer, offers you the assurance that your new HVAC system will be sized correctly. Properly sized HVAC equipment works better, lasts longer and needs fewer repairs. At JD’s A/C LLC, we follow industry-established best practices to calculate heating and cooling loads, ensuring that your new HVAC system delivers optimal comfort at the best price.

Load Calculation Factors

Each home or business has its own heating and cooling requirements. A structure’s “load” is based on the rate of heat transfer per hour — how much heat must be added or removed to maintain a comfortable indoor temperature. Calculating a structure’s heating or cooling load involves more than just measuring its square footage. Factors influence the heating or cooling load of your home or business include:
  • The seasonal climate of the Longview region
  • The number of windows in the structure and their orientation to the sun
  • The design and layout of the building’s interior
  • The building’s construction and level of insulation
  • The number of people who use the home or business
  • The number and size of rooms used regularly

Proper HVAC Systems Sizing

Precise calculations help ensure that your new HVAC system is neither too big nor too small. Proper sizing doesn’t just affect installation costs. An undersized or oversized system negatively impacts performance too. A too-big system will cycle on and off frequently, resulting in uncomfortable temperature fluctuations. Because oversized systems tend to cycle off before the air has had time to circulate fully, the air can feel stuffy or clammy as well. An undersized system needs to run longer to meet your heating or cooling demands, causing undue wear and tear that reduces the system’s service life.

Reducing Heating and Cooling Loads

Homes and businesses with low heating and cooling demands can be fitted with smaller sized HVAC systems, saving owners money without compromising comfort. A number of relatively inexpensive improvements can reduce your heating and cooling expenses. The best way to indentify cost-effective solutions is with a home energy audit. Using equipment like infrared cameras and thermographic scans, auditors can pinpoint areas of your home or business that are wasting energy.

Serving the Nacodoches community for over 30 years, the experts at JD’s A/C LLC take the time to perform a precise and accurate load calculation for every HVAC system installed. We know that our continued success depends upon providing long-term satisfaction to our valued customers in Longview TX. You can count on our skilled technicians to establish the correct size for your specific application, ensuring that your new HVAC system meets and exceeds your expectations for years to come.

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