Poppy1 and Lastbuilders
What size boilers are you using?
I'm urrently building a 2500sf wood frame house and using rads to heat the rooms. Also have solar panels to heat water during the summer months. Plumber is stating that I will need to purchase a 40kW boiler to satisfy my heat demand. Could this be the case? From my research (talking to various boiler suppliers) I believed a 24kW boiler would have been sufficient. Don't want to end up with something that is going to eat pellets.
Oldgold.
I have a 40kW WPB which is obviously too big for my house (2,200 sq ft) - I went with the plumbers advice & the suppliers didn't discourage me as they said it souldn't use any more pellets anyway. So far they are right as 3.5 tonnes hasl lasted the full year - similar to those posters with smaller boilers.Thanks for all the responces folks,
Talked to a good few people since my original post and they all said the same, 24kW is sufficient. And that's what I'm going with. When i went back to the plumber and put this to him explaining my exact heat needs and how I would intend to heat the house, ie heat the downstairs rooms in the early evening and only have the heating come on in the bedrooms later in evening, he said a 24kW would have no problem heating the house.
He was specing the boiler size based on all the rads and hotwater coming on at the same time with thermostats set for 23 degrees downstairs and 19 upstairs. (worse case in his opinion).
If I had been putting in an oil boiler he would have never discussed the boiler size and I would have ended up with a big inefficient boiler.
I'll let you know in the next few months how I get on with this boiler
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