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Old 10-23-2019, 10:53 PM   #21
Lepke's Avatar
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 1,667
If you don't want or need to leave the heaters on all the time, Thermocube turns on at 35F and off at 45. Rated for 15 amps, under $20 on eBay. Cubes come in other temp ranges, for turning on AC, etc. I use them to turn on my Detroit engine block heaters in cold weather. If I leave them on (1500 watts each) the engineroom is 70 in a few hours in zero weather. Having them on the Cubes keeps the engineroom about 40 and protects the generators and plumbing. Although since I live aboard, I've never measured below 34 in zero weather w/o heat in the engineroom.
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