WhisperKOOL Cooling Calculator
Tell us about your cellar's ceiling, floor and walls and we'll work out how much heat the space takes on, in BTU/h and watts. You then get a shortlist of WhisperKOOL systems for that load, grouped by installation type, with a link to each one in our store.
Estimated Cooling Load
The load figure assumes 85 °F (29 °C) air entering the condenser.
Enter the hottest conditions your cellar will realistically see, so the system is not undersized. Humidity and door traffic are not part of this math: if your climate is humid or the cellar door opens often, look at a system rated 500–1,000 BTU/h above the result.
How the sizing works
Every surface of a cellar lets some heat in. For the ceiling, floor, walls, doors and glass, the calculator takes the area, divides it by the insulation value and multiplies by the temperature gap between the outer side of that surface and your cellar, then applies the sizing factor WhisperKOOL uses. Picking a condition such as “Attic Space” only pre-fills a typical temperature, and you can overwrite it.
A WhisperKOOL model appears when its capacity fits the load plus the manufacturer's margin. The 50 % runtime list is for systems expected to cycle about half of the time; the 25 % runtime list is for bigger systems that cycle about a quarter of the time. Capacities are the calculator's values at an 85 °F condenser intake. Treat the result as a shortlist to discuss, not a finished specification.