My 15 RLQ Fujitsu ductless heat pump,seer of 21 and EER 14.5 operates as low as 5 degrees F(-20 C). However it does go thru the defrost cycle of around 5 min. when it is very damp outside . Any suggestions on how one could speed up the process?Could one use something like electric pipe wrap or some cable . My neighbour has a built in crankcase heater in his UTL outdoor unit and I never see any ice or condensation under the unit. his SEER is 15 and EER is 12. My unit always has ice build up on the ground under the unit. A quick blast of warm air would melt the frost a lot faster.I only run my XXV pellet stove on rare occasions. I have replaced over $1200 of pellets with about $300 of electricity. Wayne in NS.