Adding electric heat to coleman Mach3+

The circulation of air from the roof top ducted units over comes any convection currents from warm air rising. The largest issue is they produce only 5118 btu's. Folks expect miracles from less heat that of a small burner on a propane stove.

I have my furnace on a different thermostat, so I can use all my various heating systems together giving me access to 23,000 btu's from electric and a further 25,000 from the furnace.