gas heater for spa 300 btu vs. 400 btu
Just a quick question about upgrading to a 400 BTU Gas Heater vs. staying with the 250 or 300 BTU base models. Is it worth it time and efficiency wise to upgrade to the higher model. The cost differential isn't that much so that is not the worry for me. I'm more concerned with the gas usage - is 400 BTU model going to to make our gas bill significantly higher?
Thanks so much!