Part # 014719
for the 125 or 150 btu what size propane tank should I use
Hi Ken. A 125 or 150 heater requires 1-1/4 to 1-1/2 gallons of propane per hour to operate the unit. The bigger the tank the less you will have to refill it. I would recommend that you check with your local county code enforcement to find out what size tank they will allow you to have.