Evaporative cooling works well on dry, hot days but is useless on humid days. Because of evaporative cooling, heating your home can cost significantly in the colder months. Efficiency Matrix tested air tightness with and without evaporative cooling on a 15-year-old home in Melbourne, Australia.

The difference in air leakage in a home with evap cooling can be as high as 10ACH@50Pa, and in this video, we demonstrate how evaporative cooling can negatively affect a home's heating performance.

Having an evaporative cooling outlet in each room of a house is like having a chimney open in each room.

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