We are finally getting around to getting our H150 gas heater hooked up this for this season. We ended up with 1 2x20 solar heating panel. My question is for anyone using a 150,000 BTU heater for a 24 foot round. How is the actual cost of running the heater? I mean does this bill go up 100 dollars a month? 50 dollars? We are just not sure of what to expect with this. I am not sure if we want to setup something hat will be a money pit so to say.