atlasfever
Member
- Messages
- 167
Hi All,
I had raised this some many months ago, but now have more information, so feedback welcomed.
Topic: Underfloor heating in period home (water pipe version)
Background: Georgian 1st floor flat
Other details: 12ft ceilng heights, lots of large, single glazed windows, no insulation but only brick walls
I had a heatloss calculation done, and shared it with an underfloor heating specialist (Kestrin), who came up with a quote/design for my flat. They responded saying that there is a heating shortfall across the flat, based on 20degrees C. I have two front rooms with a total of five 9ft sash windows. I understood that this could be an issue. However, even in my bedroom (where it's about 15 x 15 ft, and there is only one 8 foot window, and only the width of the window is actually an external wall) came up with a shortfall. This is surprising to me.
I really do not want to pay for underfloor heating and then also pay for radiators. Cost wise, the whole underfloor price costs about 6k w Vat, whereas the radiator approach is more. And, I would obviously prefer to floor space than have radiators in each room.
So, about insulation and windows:
A. Because of repairs, etc, I have almost all of the external brick walls exposed. My contractor said that I could add an insulation to it, and something about damp proof insulation, etc. Apparently it's not very thick and comes in slabs. Any experience? I believe this has some impact on heat loss, but maybe only 10% difference.
B. I will approach council later about 12 or 14mm double glazing units to my non-original sash windows. I have already discussed the double glazing story (the emotions of using double in period house, shutters, etc) and decided that I will do double glazing; however, I am curious if you think the double glazing at 12/14mm makes an impact on heat loss (I'm not going to install secondary glazing). Oh, and I will do proper draught proofing too. When you look at heatloss calculators, it's hard to figure out if they consider double glazing to be 12mm or 14mm or more mm? or, for that matter, when they ask for insulation, is it the type of insulation against brick as my contractor suggested? The heatloss estimates drop by 10% when you choose the 'insulation' filter, but if you choose double glazing, it's significantly less (i recognize this is all theoretical calculations, but one has to start somewhere
C. If I were to supplement the underfloor heating with something else, have you any experience with electric heaters that fit into the floor? I was at a historic bldg/museum recently, and saw a heater that was under the floor, but exposed via attractive metal covers. I looked closely and read that it was an electric heater. I could use this during unusually cold nights I suppose.
Thanks for feedback.
I had raised this some many months ago, but now have more information, so feedback welcomed.
Topic: Underfloor heating in period home (water pipe version)
Background: Georgian 1st floor flat
Other details: 12ft ceilng heights, lots of large, single glazed windows, no insulation but only brick walls
I had a heatloss calculation done, and shared it with an underfloor heating specialist (Kestrin), who came up with a quote/design for my flat. They responded saying that there is a heating shortfall across the flat, based on 20degrees C. I have two front rooms with a total of five 9ft sash windows. I understood that this could be an issue. However, even in my bedroom (where it's about 15 x 15 ft, and there is only one 8 foot window, and only the width of the window is actually an external wall) came up with a shortfall. This is surprising to me.
I really do not want to pay for underfloor heating and then also pay for radiators. Cost wise, the whole underfloor price costs about 6k w Vat, whereas the radiator approach is more. And, I would obviously prefer to floor space than have radiators in each room.
So, about insulation and windows:
A. Because of repairs, etc, I have almost all of the external brick walls exposed. My contractor said that I could add an insulation to it, and something about damp proof insulation, etc. Apparently it's not very thick and comes in slabs. Any experience? I believe this has some impact on heat loss, but maybe only 10% difference.
B. I will approach council later about 12 or 14mm double glazing units to my non-original sash windows. I have already discussed the double glazing story (the emotions of using double in period house, shutters, etc) and decided that I will do double glazing; however, I am curious if you think the double glazing at 12/14mm makes an impact on heat loss (I'm not going to install secondary glazing). Oh, and I will do proper draught proofing too. When you look at heatloss calculators, it's hard to figure out if they consider double glazing to be 12mm or 14mm or more mm? or, for that matter, when they ask for insulation, is it the type of insulation against brick as my contractor suggested? The heatloss estimates drop by 10% when you choose the 'insulation' filter, but if you choose double glazing, it's significantly less (i recognize this is all theoretical calculations, but one has to start somewhere
C. If I were to supplement the underfloor heating with something else, have you any experience with electric heaters that fit into the floor? I was at a historic bldg/museum recently, and saw a heater that was under the floor, but exposed via attractive metal covers. I looked closely and read that it was an electric heater. I could use this during unusually cold nights I suppose.
Thanks for feedback.