Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

The Importance of Heat Load Calculation in HVAC Installation

22 May 2024 · 1 min

Watch on YouTube

0:40

Short YouTube excerpt (single speaker, HVAC technician) explaining that a heat load calculation is done on every installation to determine a house's heat loss or gain and thus properly size the HVAC unit. The speaker emphasizes that past equipment size (e.g., a 4-ton unit for 25 years) does not eliminate the need to recalculate because changes to the home (new windows, doors, added insulation, roof replacement) can alter heating/cooling needs.

Chapters

On every install, we do a heat load calculation, which is a load calculation on your house to make sure that it is the right size unit going into your house. Now, it doesn't matter if you had a 4 ton unit for 25 years in your house, because we still need to do one and because you probably replace the windows, the doors, add insulation, replace the roof, got more insulation, something has changed in that space. So we're just going to calculate again what is needed, how much heat loss or heat gain your house has that will allow us to properly size the unit.