It's essentially a 1500w ceramic heater. The models I've seen installed at units warmed quite nicely (of course this was at a RV show, no real-world experience).
The outside ent. system on my unit is a CD/AM/FM unit with a power port and TV hookup and 2 marine speakers.
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Mike
2013 Jayco Eagle 334RBTS
Crossroads Forum Lurker