Originally Posted by Grumpy
You can buy a lot of propane for $800 plus install. Get a couple electric heaters, they work great and add the heat strip to your AC. Worked for us with 17 degree outside temps in DEN.
Looks like there are couple of differences:
*One the system is only $495 online.
*Heating you coach from the ceiling via a rooftop AC heater will not keep your under floor stuff from freezing.
*When heating from the roof your floors are always cold.
*You can NOT heat a 38 or 40 ft coach with multipal slides down to 17 degrees outdoors with a 1800 watt AC heater coil.
I have some sizing information right off of there web site.
When talking about heat output, remember that a gas furnace is only 60% efficient, 40% of the heat goes out the flue. But an Electric heater has no flue so it is 100% efficient. This means a 40,000 BTU an hour furnace has only 24,000 BTU an hour output.
Additionally, a gas furnace has a 60 second pre-purge cycle and a 90 second post-purge cycle. Which means that for every heating cycle, there is 2 1/2 minutes of run time with no flame (heat). After taking into consideration the 2 1/2 minutes of no fire each heat cycle, along with the efficiency issues your true output into the coach with a 40,000 BTU gas furnace, is about 18,000 BTU an hour when measured at the register. The 100% efficient CheapHeat™ DH50 has a true 17,500 BTU an hour output to the register (Add-On or Stand-A-Lone).
The best way to explain it is if you measure the temperature at the floor register the electric heat output is +/- 5 degrees of what a gas furnace puts out (depending on the length of the ducting).
The Stand-A-Lone system (CH50-SAL) provides the same amount of heat as the Add-on System:
• CH50-DH50: Comparable to 40,000 BTU Gas furnace (Requires 50 Amp Service)
• CH50-DH37: Comparable to 30,000 BTU Gas furnace (Requires 50 Amp Service)
• CH50-DH18: Comparable to 20,000 BTU Gas furnace (Requires 30 or 50 Amp Service)