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What is a heat load calculation?

Neighbors A/C & Heating helps you determine if your HVAC (heating, ventilation, air conditioning) is sized properly for your home. We are not the cheapest, but we are the best.

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Best air conditioning and air duct installation services in the League City area.


Heat loads are performed by using an industry standard manual J. The Manual J is a protocol created by HVAC engineers to help cooling and heating contractors select the proper home HVAC system size that a house needs for adequate cooling or heating.

Manual D duct design distributes the correct amount of heating and cooling to each room based on the Manual J load calculation results. Checking for the correct amount positive airflow for cfm's and the correct amount of negative airflow for return airflow for your homes existing HVAC tonnage.

Many aspects contribute to heating and cooling loads. Texas humidity levels affect your cooling comfort significantly. Your homes design, directional orientation, window size and directional orientation, inches of attic insulation and outdoor shade contribute to the homes ability to maintain your comfortable temperature in all seasons.

Our "heat load calculation expert" schedules a thorough walk through to perform your homes heat load test. Information is gathered based on thermal enclosures and internal features. Thermal enclosures consist of the homes directional orientation, windows, attic insulation, and external shading. Internal features consist of location of the ductwork, lights, electronics and the amount of people living in the home space.

The location of your existing duct systems affect your homes heat load. For instance, if ductwork is running through UN-insulated warm spaces will have different load requirements compared to ductwork passing through well insulated attics.


At Neighbors A/C & Heating, we know that air conditioning is a necessity in the summer months. Our team is dedicated to providing you with the best air conditioning and air duct installation services, so you can stay cool and comfortable all year round. We offer free ductwork evaluations with ductwork estimates, so you can get the most efficient cooling system for your home. We also provide maintenance and repair services, as well as energy-efficient upgrades. Get in touch today to learn more about our services and to schedule an appointment.


Neighbors A/C & Heating, your trusted and favorite neighbor!

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