its the only thing thats going on in my house this winter, yes its a 2nd option heating system or to run along side a gas central heating system but we can make do without the gas, leave the living room door open and it heats upstairs to,not brilliant but just about ok, consumes around 3 good logs per 90 minutes, im going to let it tick over all day on smokless coal then load logs at night,,no question about it if you have a house with a fireplace then get your old fire out and open it up,have a smoke test done and your all set, ive just converted gravity fed hot water from it to the bathroom so in effect all showers are now free