One of our three heat pumps went out last week. We had it replaced at about the same cost as our first house.
While the technician was installing the unit he began to carry on about how people think they are doing the right thing by planting greenery around their units and then mulching. The tech said that is the worst thing for an outside HVAC unit because the mulch and dirt particles clog up the coils and can ruin the condenser. He said the best covering around a unit is gravel.
Today I "mulched" our heat pumps with gravel.
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