We had two of these fires in our home, one in sitting room and a very high ourput one in open plan extension. We had both taken out before Christmas as our bills were ridiculous. Gas company said nobody is putting them in now, firstly because of cost (we can see a huge reduction in the cost of our gas bill) and secondly they give very little heat. We are back now with two open fires and i can tell you the difference in the heat output is extremely noticeable. We are getting a stove fitted in our sitting room this week for a solid fuel fire and in the extension we are going to have an open fire.