Matt Posted May 9, 2006 Share Posted May 9, 2006 Can anyone tell me how to work out how many kw,s I need to heat a room from a woodburner ? Link to comment Share on other sites More sharing options...
powerdesal Posted May 9, 2006 Share Posted May 9, 2006 How accurate do you want to be?The 'crude & dirty' way is, I believe, 5 cu m / kw but its morecost effective to do the maths and work out the heat transfer(leakeage) through the fabric of the walls + ceiling + floor. Thisinvolves knowing the 'U' value of each surface, the temperature youactually want to achieve, the assumed minimum outside (usually -1 degC), the area of each surface. Its not particularly difficult, just abit of research, measurement and number crunching.Its a bit late at night to go into more detail, plus typing andbacardi/coke dont really go together. Google search under CentralHeating Design will give you a feel for the type of calcs needed forany particular room.Regards Link to comment Share on other sites More sharing options...
Deimos Posted May 9, 2006 Share Posted May 9, 2006 I actually selected mine on the basis of “cosmetics” and the space it needed to “fill” (i.e. not look too small and not too large. It is actually significantly “over specd” for the room volume but I felt I could always turn the level down. In fact its ideal being too powerful (I don’t get too hot either). (The manufacturer specification for mine says up to a 300 cu m room and my room is less that half that size). Ian Link to comment Share on other sites More sharing options...
powerdesal Posted May 9, 2006 Share Posted May 9, 2006 Deimos,That must be one humongous woodburner, I thought I had a big room at5.25 x 5.3 x 2.3 m and thats about one fifth of your stove rating. Whatsize room have you??????????????????? Link to comment Share on other sites More sharing options...
Deimos Posted May 9, 2006 Share Posted May 9, 2006 My sitting room is close on 6m x 7m x 3mIan Link to comment Share on other sites More sharing options...
Tresco Posted May 9, 2006 Share Posted May 9, 2006 Matt, I love my poele, but I would rather have both it, and central heating.Is there a reason you can't have central heating?I wish I did. Big mistake. Link to comment Share on other sites More sharing options...
Gluestick Posted May 10, 2006 Share Posted May 10, 2006 Couldn't agree more, Tres!The lounge is 7.6M X 4.6M. At present, whilst we do have electric "Central Heating" as well as the wood burner, the electric heating is very poor and very expensive![:@]So, the next job this year, is oil-fired Chauffage Centrale.The poele is great for siting round and watching the flames with a glass of red stuff: but it does mean one end of the room becomes stiffling: and the other is still chilly.Also have a Deville diesel heater: messy and expensive. Can eat up to ten litres a day (ouch![:(]) in really cold weather. Central heating will be cheaper and much better at evenly distributing the heat all around the house (which is 27 M long).And then for the Greniere.............................. Link to comment Share on other sites More sharing options...
painterman Posted May 16, 2006 Share Posted May 16, 2006 We were looking into this a couple of months ago. If you have a look at the thread in this section on ' page 10 of 96' at the top of the page is a question by Bannon- "wood Burners ... again " 8/3/2006 17.06 pm. Quite a few people had useful input that might help you. Our added note to it was in short :To calculate how many Kw of heat a room needs is Kw = H x W x D and divide by 14 (so this is the Height X Width X Depth of your room, basically its volume), and then if you wanted to work out how many BTU's this is .... : BTU'S = H x W x D divide by 14, and then multiply by 3400. This is what we were told by a local installer of woodburning stoves, but I have read other threads which say that you need to take into account what materials your room is made from as its 'envelope' for holding in all that heat. So you need to think about windows, insulation, walling, ceiling materials etc. I'm not sure how much detail to go into on this one, we were happy with the basics for now, but the options are ther for you to look into if you wish. I'm sorry I don't know much more about this, yet.... Link to comment Share on other sites More sharing options...
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