Tim told me this boiler would pay for itself in one year! IT DID! I am heating an 8000 SQ FT. building for less than 50.00 a month I buy slab wood I fill it twice a day. You can stop by Gib’s Super City 6088 6 Mile Evart Mich 49631 and see it run. Tim is a great guy to do business with I had never installed a boiler before, he helped me with great advice and answered all my questions. I researched a lot of brands and I am so glad I found EZ Boiler Brand It a great product and i saved a ton of money!