Covering Your Outdoor Heating/Cooling Unit
Should I cover my outdoor unit in the fall and winter?
Covering the outdoor unit is not necessary and not recommended, especially if you have a heat pump that runs all year long. In fact, covering an entire unit may actually trap moisture and cause problems. If you're concerned about leaves and debris getting inside the housing, a short cover (leaving the sides of the unit exposed to avoid moisture build-up inside) may be used, or maybe simply just use a piece of plywood covering the top.
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