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  1. #1
    Join Date
    Oct 2012
    Location
    Burnaby, BC, Canada
    Posts
    10

    Default Hot water floor heating

    As the picture showing (marked by the green arrows), can anyone give an explanation why some area are warmer and others are not. Thanks.

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  2. #2
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    5,005

    Default Re: Hot water floor heating

    1. Distance from supply
    2. Boiler just starting up, water entering the loops will take some time to heat the mass, more so if the tubing is in concrete.
    3. Insulation/radiant barrier improperly installed in concrete.

    Was the heating system running when you inspected or did you activate the system?


  3. #3
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,848

    Default Re: Hot water floor heating

    It's only a degree or two different. I would not even worry about it. Like Ray noted, it could be caused many reasons.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  4. #4
    Join Date
    Mar 2012
    Location
    Lansdale, PA
    Posts
    876

    Default Re: Hot water floor heating

    If the tubing is fed from a common manifold at the end then the flow rate in each tube will vary. Slab temperature can also vary from sunlight or distance from exterior, etc.


  5. #5
    Join Date
    Oct 2012
    Location
    Burnaby, BC, Canada
    Posts
    10

    Thumbs up Re: Hot water floor heating

    Quote Originally Posted by Raymond Wand View Post
    1. Distance from supply
    2. Boiler just starting up, water entering the loops will take some time to heat the mass, more so if the tubing is in concrete.
    3. Insulation/radiant barrier improperly installed in concrete.

    Was the heating system running when you inspected or did you activate the system?
    Good points. Thanks.
    Yes, it is only 1 or 2 degrees difference, I won't make it a big deal. In the report, I stated " heating source is confirmed". But some clients are asking, we better give them a proper explanation.


  6. #6
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,291

    Default Re: Hot water floor heating

    Quote Originally Posted by Gordon Lee View Post
    Good points. Thanks.
    Yes, it is only 1 or 2 degrees difference, ...
    That's 1 or 2 degrees difference in Celsius ... surely that is hotter than 22 degrees F.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  7. #7
    Join Date
    Mar 2013
    Location
    on
    Posts
    7

    Default Re: Hot water floor heating

    I would guess that the warmer and cooler rectangles correspond to something on the underside of the floor.
    Perhaps a closet for the warmer area?


  8. #8
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,558

    Default Re: Hot water floor heating

    Quote Originally Posted by Jerry Peck View Post
    That's 1 or 2 degrees difference in Celsius ... surely that is hotter than 22 degrees F.
    FYy'allsI, Canada, including Upper Canada, adopted Metric and joined the rest of the world about 1968, under Pierre Trudeau.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

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