Using a "watts Up" meter on a 13,500 BTU coleman rootop heat pump, I found my unit uses 1400 watts on high, and 1550 on low. I found it odd that it uses more electricity on low, but an AC tech told me that it's because the compressor is under more load on low, since less refrigerant is condensed, and internal pressures get higher. On heat, with 40 degree outside temps, it uses 1370 on high, and 1600 or so on low. When the heat strips kick in, it goes up to 1800 watts, but when that happens, I gurn it off and run the propane furnace.
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