VENT FREE GAS LOG HEATER

Ddaddy said
It's actually the other way around. Natural Gas makes about 25% more water from combustion than Propane as a result of the chemistry of combustion.

Propane
100,000 BTUH = 0.98 Gallons of Water

Natural Gas
100,000 BTUH = 1.25 Gallons of Water

I'm aware "I used to do this." I was talking about the smell of propane "unvented". I guess I didn't state that very well. I just meant that ANY combustion burner makes a fair amount of humidity if unvented