Source: Jonathon Jachura / June 15, 2023
Even the most efficient air conditioners create some condensation. As your HVAC system pushes cool air through the ducts, they get cold.
The temperature in your attic or crawl space is usually much warmer than the ducts when the cold surface touches the warm air, duct condensation forms.
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The energy intensity for cooling commercial buildings in the United States depends on the climate the building is located in. Energy intensity in buildings is the energy consumed per square foot of floorspace. U.S. commercial buildings in hot or very hot climates, which are primarily in the southernmost parts of the country, were more than six times more energy-intensive for cooling (14.2 thousand British thermal units per square foot [MBtu/sf]) than buildings in cold or very cold climates (2.3 MBtu/sf).