in regards to using my CPAP with any thing else that takes 12V......
now to figure out if THIS is true. So confusing sometimes. Not that the Webasto Duo Top Evo is a ducted furnace, but it does take 12V...
12 v. power usage: All ducted furnaces depend on a 12v. fan to circulate hot air. The fan in my first RV drew 7 amps from the battery. Another RVer with a bigger rig and a higher output furnace reports that his unit draws 11 amps. On a cold night when the fan may run for many hours, this load, combined with other typical 12 v. power uses, may completely discharge a typical battery in a single night, if the RV is not connected to shore power.
