Michael Reid Posted February 6, 2004 Share Posted February 6, 2004 The current thing over here seems to be 'condensing boilers', which basically condense water vapour out of the flue gases, thus recovering latent heat. They cost a fortune however (about £1000). I have a new condensing furnace (a forced-air system, not a boiler), which is a sealed-combustion unit, with its own outside-air supply via a big PVC pipe that goes through a side wall. It's connected to a pre-existing whole-house humidifier. With this new system it's easier to keep the house at humidity levels that, for Colorado, are heroically high: the mid-30's. Since I'm in the energy analysis business I did a lot of homework before choosing this system. I estimated that the additional cost of the condensing furnace would pay back in 7 or 8 years, which made it a decent investment. (Your mileage may vary.) The sealed combustion and the variable speed fan provide additional advantages beyond energy savings, like the humidification benefit Rich described. Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.