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HVAC Needs: What Goes Into Your Load 

Many homeowners spend time online searching for the right HVAC system for their homes, but it takes a local HVAC pro to address the HVAC needs unique to your home and family. Doing research ahead of time helps you make a more educated decision. However, nothing can replace the insight and tools a professional offers, especially when it comes to sizing HVAC systems.

HVAC experts refer to the amount of conditioning your home needs as your heating and cooling load. They calculate it using a complicated set of factors that include its:

  • Cubic footage
  • Insulation levels
  • Exposure to sunlight
  • Number of windows, their efficiency and placement
  • Degree of air infiltration
  • Floorplan design
  • Preferred indoor temperatures
  • Number of heat-producing appliances indoors
  • Family size and ages

HVAC contractors use Manual J software to input these data. When completed, the results indicate the tons or Btus (British thermal units) of the equipment you need. An energy efficient home won’t require as much HVAC capacity as one without adequate insulation, single-pane windows, or lots of air leaks.

The Benefits of Load Calculations

Conducting the HVAC needs calculation does take time and it’s a fair amount of work. However, it does make a difference in your comfort, energy bills and the lifetime costs associated with your next HVAC system by:

  • Finding weaknesses in your home’s energy efficiency. Adding insulation and sealing air leaks could make a difference in your home’s conditioning load, saving money on its initial cost and long term energy bills.
  • Getting the best size for your home. A system that’s too small or large won’t run as efficiently. Oversizing the system lowers its efficiency, raises energy costs, leaves humidity behind when cooling, and shortens its lifetime. Undersizing it forces it to run too long at a time, and during weather extremes, you may not be comfortably warm or cool.

Before you move forward with a new HVAC system, have a licensed HVAC contractor help you assess your HVAC needs. To learn more, contact Beyer Boys, providing trusted HVAC services for San Antonio homeowners.

Our goal is to help educate our customers in the greater San Antonio, Texas area about energy and home comfort issues (specific to HVAC systems).

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