Originally Posted by
GeezerSteve
How old is your furnace? RV furnace fans have become much more energy efficient. The furnace in our 2000 Hawk was an energy hog, required daily recharges on cold winter days. Based on frequency of need to recharge, the furnace fan in our 2014 Hawk sucks est. <1/3 the electricity. FTR, we prefer to sleep in winter sleeping bags and not run the furnace while we sleep. In the 2014 Hawk, running furnace 6-8 hours/day, we can get through 2-3 cold (say <15F avg, 5F low) cold winter days between charges (although I usually bump the batteries with our Honda eu1000i generator for an hour each day to prolong long-term battery life)