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Radiant "In Floor" heat question

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Radiant "In Floor" heat question Jimi 03-12-2007
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Posted by Jimi on March 12, 2007, 11:55 pm


Hello,

I have bought a garage package (24ft x 30 ft) and plan on putting " in
floor" heat in the concrete pad. I have googled and done several searches
looking for a photo or any hand drawn examples of how to lay the pex pipe
prior to pouring the concrete. I would like to know how to determine the
diameter of pipe to lay...how far apart to lay the pipes ...how many grids
are needed?. This is a simple heated garage...very basic, but can't find any
schematic for laying this pipe....Thanks for any help on this... Jim



AppliancePartsPros.com, Inc.
Posted by RicodJour on March 13, 2007, 10:02 am


Jimi wrote:
>
> I have bought a garage package (24ft x 30 ft) and plan on putting " in
> floor" heat in the concrete pad. I have googled and done several searches
> looking for a photo or any hand drawn examples of how to lay the pex pipe
> prior to pouring the concrete. I would like to know how to determine the
> diameter of pipe to lay...how far apart to lay the pipes ...how many grids
> are needed?. This is a simple heated garage...very basic, but can't find any
> schematic for laying this pipe....Thanks for any help on this... Jim

The size and spacing of the PEX is dependent on the required heat
output which is dependent on your location, system size and operating
temperature, slab construction, etc. You've basically asked what size
of pants you need. We can't know that.

The manufacturer/distributor will size and layout the system for you
for free. There's no reason for you to reinvent the wheel on this.

R


Posted by Edwin Pawlowski on March 13, 2007, 11:03 am



> Hello,
>
> I have bought a garage package (24ft x 30 ft) and plan on putting "
> in floor" heat in the concrete pad. I have googled and done several
> searches looking for a photo or any hand drawn examples of how to lay the
> pex pipe prior to pouring the concrete. I would like to know how to
> determine the diameter of pipe to lay...how far apart to lay the pipes
> ...how many grids are needed?. This is a simple heated garage...very
> basic, but can't find any schematic for laying this pipe....Thanks for any
> help on this... Jim

You can get that information by checking out the basics of radiant flooring
from the manufacturer. What you need to know first is how much insulation
you'll have in the floor, temperature of your region, temperature you want
to maintain, etc.

In most cases, heating the slab is not a good idea in a garage. It is very
slow to react both heating up and then cooling down so if you are using hte
garage for a shop on weekends, it will cost a fortune to start heating it on
Wednesday night to be comfy on Saturday morning. It may be OK if it is an
every day use though. If you want to just keep your cars warm, well, that
would be dumb and a terrible waste and probably rust them out when the road
salt heats up.

You may do far better and save a bundle of money using infrared heaters
mounted above.




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