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Weird smell from in floor heat

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Wghiggins
Wghiggins Member Posts: 1
in Radiant Heating
Hi there. I have in floor heat, and when it turns on there is a weird smell that only I can smell.   It took forever for me to realize it was the heating. I replaced a lot of things (toilet, tiling) and it went away all summer. Now first day the heat is on, the smell is back, and only in the rooms w the in floor heating.  System was changed a month ago. Last year it was a boiler and a hot water tank, and there was some pex. Now it is all one on demand gas fired boiler for both heat and hot water. In floor heat is red plastic pipe. pex section was replaced.

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  • ratio
    ratio Member Posts: 3,630
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    What is the temperature of the floor loops when the system is heating? Maybe it's higher than previously & is causing more outgassinging from the floor coverings.
    JUGHNE
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,546
    edited October 2021
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    @Wghiggins

    Is this smell new with the new boiler or did you have it with the old boiler as well??

    Is their any antifreeze or glycol in the boiler system??

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