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Old 12-03-2012, 12:40 PM   #1
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PEX Radiant Heating


Hey Guys,

I just purchased a foreclosed house, which had all of the heating on the first floor removed. I decided to install a pex radiant heating system on the first floor, where the pex will be installed in circuits between the joist in the basement, below the subfloor. I purchased all of the equipment including the oxygen barrier pex, a 4-port manifold, some aluminum transfer plates and all of the equipment for the installation.

I'm trying to do as much of the work myself and I just finished installing all of the circuits below the subfloor and it looks like this: http://corvallisdowntownliving.com/S...taple%20up.png
(This isn't my actual install, but it looks identical to this with 4 equal length circuits covering the entire first floor).

All of my lines are connected to the return and supply side of my manifold, like so: https://www.houseneeds.com/shop/Imag...lds_xlarge.jpg (again, not my actual install, but identical equipment)

Next I need to hook this up to my furnace. My furnace is set up for 2 zones, one for the upstairs and one for the downstairs.

I've been told I need a mixing valve to help regulate the temperature between the supply and return lines, but I'm not exactly sure where to install this.

Can someone tell me what I need between the manifold and the furnace? If you need more information please let me know and I can supply you with pictures later tonight.

Thanks in advance for the help. -Justin.

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Old 12-03-2012, 01:24 PM   #2
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PEX Radiant Heating


Mixing/tempering valve. the circ pulls through it.

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Old 12-04-2012, 08:59 AM   #3
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PEX Radiant Heating


Thanks Beenthere.

Another question...which I feel stupid asking but anyways..how do I thermostatically control this system?
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Old 12-04-2012, 04:30 PM   #4
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PEX Radiant Heating


Get a Taco zone control panel. Both zones will have their own stat and their own circulator.
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