Our HVAC Load Calculator is the best starting point for any new installation project. By entering simple details about your room size and insulation, it provides a tailored recommendation for the BTU Capacity you need. This prevents the common mistake of buying a unit that is either underpowered or wastefully large. Once you have your calculation, you can easily Sort by BTU on our site to find the perfect match. It is a much more accurate method than simply guessing based on square footage alone. Getting your sizing right is the first step toward qualifying for Energy Star efficiency and tax credits. For more complex houses, you can also Request a Quote for a manual load calculation from our team. It’s a free tool designed to give you confidence in your Heat Pump System purchase.