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Old 01-25-2009, 06:23 PM   #1
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Radiant flooring


We are considering the Danfoss mats for our master bath. A friend of mine mentioned there might be a code requirement to have the mats start a certain distance from the vanities. Does anyone know where I would find this info? I tried to find online but got nowhere with the county website. Also, in your experience, how much does the heat spread from the perimeter of the mat? I have gotten varying accounts on the heat spread and it will impact mat sizing.
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Old 01-25-2009, 06:29 PM   #2
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Radiant flooring


Are you installing this under tile or what type of flooring? No electrical violations involved with placement near the vanities or toilet or shower. We usually cover the entire floor except under the toilet, vanity and shower unit. Heat transfer depends on the heat mass you are heating. Radiant heat will move to the nearest cold objects. Electrical code would not allow the thermostat be placed where it can be reached by someone in the shower.
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Old 01-25-2009, 06:35 PM   #3
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Radiant flooring


Installation under tiles. Cement board floor, radiant cables, scratch coat 3/16" thinset, then tile. 240V cable, each mat section 2' wide.
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Old 01-26-2009, 04:25 AM   #4
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Radiant flooring


then my original post covers it. It is fine to be as close to the vanities. Actually best to heat the entire floor mass.
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Old 01-27-2009, 06:39 PM   #5
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Radiant flooring


Keep 6" from the wax ring of the toilet. You can't install a line voltage mat in or under the shower or tub. Install the mat so the perimeter cables are within 1/2 the distance between the runs in the mat itself from the vanity and walls. To clarify, if the wires in the mat itself are 3" from each other, then you should be 1-1/2" from the vanity. That way it will heat out equally from and within itself.

Don't heat under the vanity or any permanent fixtures. It's not only a waste of energy but you could trap the heat and dry out the wood of the vanity.
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