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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Floor temp for radiator sizing
I'm struggling to find a reference to the floor temperature and how to
calculate heatloss though the floor. I have, through a link on the diyfaq: http://wiki.diyfaq.org.uk/index.php/...heating_design a link: http://yaph.co.uk/heating/boiler_sizing.xls but that assumes a temperature difference for the floor of 27C which can't be right. I don't seem to have joy with other links on this page: http://www.idhee.org.uk/calculator.html goes to 404 not found, http://www.est.org.uk/uploads/docume...dings/ce54.pdf goes to DNS error http://www.quinn-radiators.co.uk/downloads_heatloss.php jumps to their home page. Does anyone have a reference link for u-values and prospective ground temperature? Many thanks |
#2
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Floor temp for radiator sizing
On 19/11/2020 14:08, Fredxx wrote:
I'm struggling to find a reference to the floor temperature and how to calculate heatloss though the floor. I have, through a link on the diyfaq: http://wiki.diyfaq.org.uk/index.php/...heating_design a link: http://yaph.co.uk/heating/boiler_sizing.xls but that assumes a temperature difference for the floor of 27C which can't be right. I don't seem to have joy with other links on this page: http://www.idhee.org.uk/calculator.html goes to 404 not found, http://www.est.org.uk/uploads/docume...dings/ce54.pdf goes to DNS error http://www.quinn-radiators.co.uk/downloads_heatloss.php jumps to their home page. Does anyone have a reference link for u-values and prospective ground temperature? Many thanks Anything here of use? https://www.tombling.com/heaters/heatloss.htm (it refers to a concrete floor U or 0.7. It also uses an internal temp of 20 deg and external of -5 deg, giving 25 deg in total, which wouldn't be far off your 27 Deg) https://web.ornl.gov/sci/buildings/conf-archive/2007%20B10%20papers/222_Roots.pdf -- Jeff |
#3
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Floor temp for radiator sizing
On 20/11/2020 11:35:58, Jeff Layman wrote:
On 19/11/2020 14:08, Fredxx wrote: I'm struggling to find a reference to the floor temperature and how to calculate heatloss though the floor. I have, through a link on the diyfaq: Â*Â*Â* http://wiki.diyfaq.org.uk/index.php/...heating_design a link: Â*Â*Â* http://yaph.co.uk/heating/boiler_sizing.xls but that assumes a temperature difference for the floor of 27C which can't be right. I don't seem to have joy with otherÂ*Â* links on this page: Â*Â*Â* http://www.idhee.org.uk/calculator.html goes to 404 not found, Â*Â*Â* http://www.est.org.uk/uploads/docume...dings/ce54.pdf goes to DNS error Â*Â*Â* http://www.quinn-radiators.co.uk/downloads_heatloss.php jumps to their home page. Does anyone have a reference link for u-values and prospective ground temperature? Many thanks Anything here of use? https://www.tombling.com/heaters/heatloss.htm (it refers to a concrete floor U or 0.7. It also uses an internal temp of 20 deg and external of -5 deg, giving 25 deg in total, which wouldn't be far off your 27 Deg) https://web.ornl.gov/sci/buildings/conf-archive/2007%20B10%20papers/222_Roots.pdf Many thanks. Both of those links refer to ground temperature as being the same as external air temperature. There has been some more recent interest in soil/ground temperature with the take-up of ground source heating and these suggest a minimum temperature of 6C 0.5m below the ground. I am assuming my floor is a solid raft with no insulation so any more critical on temperature. So far I'm assuming a 15C temperature difference for the slab, but not sure if the U-factors for floors are fudged to include this. |
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