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If you're looking for propane savings, you'll probably be very disappointed. A catalytic heater MUST have outside ventilation (open windows) in the living space to prevent health problems; and adds moisture to the unit, which can cause condensation problems.
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A very exaggerated statement. Yes, except when wintering in the south, there is more condensation, but never a real problem.
Open windows ?? In reality, these Cat heaters need very little ventilation. Both of mine have oxygen sensors on them, and even w/ everything completely closed, neither has ever shown any sign of lacking oxygen. Most times I barely crack a vent for needed ventilation, keeping in mind that all RVs are not air tight anyway.
Propane savings, you won't be disappointed one bit. For me, it was not the money near as much as the packing up,.... and finding it.
Seems strange, home heaters what.....96% efficient now ? RVs still at 65% ?