Step 5 (Insulation Grade): Most homes in US built between 19 will have 4″ studs with R-13 wall insulation, and should have R-38 roof / attic insulation. In that case, your average Ceiling Height is 10 ft: high, and the highest point on the ceiling is 12 ft. However if you have high ceilings, or cathedral/vaulted ceilings, the VOLUME of your space will be higher.įor cathedral/vaulted ceilings, add the lowest wall height + peak height, and divide by 2, to get the average.
In most cases this value should be equal to 8 ft. Step 4 (Space Height): Select average Ceiling Height of your house. installing multiple single-zone Ductless heat-pump systems, in our Mini Split DIY installation guide. This value is most useful for figuring out which type of Ductless Mini-Split system to use.Īdditionally, we discuss the PROS & CONS of using a multi-zone vs. If you plan to use a Central AC + Warm Air Furnace (ducted) system, or a Boiler for heating, the number of zones is not very important in terms of estimating heat load. Step 3 (Rooms / Zones): Enter number of Rooms/Zones where you want a new Heating/Cooling system installed. This step is Critical for the accurate estimation of the annual heating/cooling load of your HVAC system! If you leave all settings as default, and only change the Region from 1 to 5 and back, you will see a huge change in Cooling/Heating BTU load. Step 2 (Area Size): Enter square footage for your house/building or a specific area, for which you are doing the calculations. If you live TX, select Region 5 (red), etc. For example, if you live in NYC or NJ, select Region 3 (yellow). Step 1 (Climate Region): Select your Climate Region, using the Region Map at the top on the calculator.
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