Forum: Renovations & New Construction
02-25-16, 07:32 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
04-01-15, 05:10 AM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
03-15-15, 04:58 AM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
03-14-15, 08:42 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
03-14-15, 05:42 AM
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Replies: 588
Views: 502,420
The manifolds are 1" for manufacturing reasons...
The manifolds are 1" for manufacturing reasons and for flow reasons. You cannot get equal pressure on all 1/2" spigots if you had, for example, a 1/2" header. The pressure drop would be so much that...
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Forum: Renovations & New Construction
03-06-15, 05:59 AM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
03-05-15, 05:02 AM
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Replies: 588
Views: 502,420
Do you have a pic of the manifold you want to...
Do you have a pic of the manifold you want to use? Most of the ones for resi use are 1" header with 1/2" spigots for the pex. Commercial ones which can be up to 30 loops, can have 1.25" headers and...
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Forum: Renovations & New Construction
02-26-15, 05:25 PM
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Replies: 588
Views: 502,420
As for control of the slab, I would just use a...
As for control of the slab, I would just use a slab sensor in a neutral area to trigger the heat source. Don't worry about night setbacks or fancy controls. Have lots of pumpkin or apple pie for...
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Forum: Renovations & New Construction
02-23-15, 04:44 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
02-23-15, 04:40 PM
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Replies: 588
Views: 502,420
AC, that is a good paper. I may have overlooked...
AC, that is a good paper. I may have overlooked something in your comments to misconstrue your points. Regardless, if you look back through any posting I have made, I have stated over and over that...
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Forum: Renovations & New Construction
02-20-15, 08:27 PM
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Replies: 588
Views: 502,420
AC, It is all great to understand how turbulent...
AC, It is all great to understand how turbulent and laminar flow affects heat transfer but there is something you forgot to mention. If you increase the diameter, your flow will become more laminar...
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Forum: Renovations & New Construction
02-20-15, 08:18 PM
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Replies: 588
Views: 502,420
20+ years ago I built a house for my mom with...
20+ years ago I built a house for my mom with 2x12 plates and offset studs, filled with cellulose. It is a 2 two storey place with 2 bdrms, bath and office on the 2nd floor.......and no heat. The...
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Forum: Renovations & New Construction
02-20-15, 08:11 PM
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Replies: 588
Views: 502,420
But the question is......do you need it? A...
But the question is......do you need it? A typical 1/2" tube on 8" spacing with 110F water can give 50 btu/ft2. I'll bet Drakes home won't need more than 10-15btu max. There is no need to try to get...
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Forum: Renovations & New Construction
02-19-15, 06:54 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
02-19-15, 05:07 AM
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Replies: 588
Views: 502,420
Ahhh, there is not a proportional reduction in...
Ahhh, there is not a proportional reduction in head loss, nor a proportional increase in heat transfer capacity over a 1/2' tube.
The heat transfer is all about wall surface area (and turbulence)...
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Forum: Renovations & New Construction
02-18-15, 06:38 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
02-17-15, 04:17 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
02-14-15, 05:45 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
02-14-15, 03:54 PM
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Replies: 588
Views: 502,420
OK, here is what I would do. First: how many of...
OK, here is what I would do. First: how many of the walls are cold walls? If, for example, you are adding an addition onto the back of a house (sorry if I cannot remember the details of you place,...
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Forum: Renovations & New Construction
02-14-15, 02:48 PM
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Replies: 588
Views: 502,420
The question I have is......why is it so...
The question I have is......why is it so difficult to do it without crossing over? What are the special issues you have? Honestly, it is the first time I've come across it expressed like this and I'd...
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Forum: Renovations & New Construction
02-11-15, 06:17 PM
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Replies: 588
Views: 502,420
I did present one good one. No one coming after...
I did present one good one. No one coming after you will realize that it has been crossed and, because it is very unusual, it could cause issues. Plus, if you look at any manifold, the supply starts...
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Forum: Renovations & New Construction
02-09-15, 05:44 PM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
09-29-14, 05:38 PM
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Replies: 588
Views: 502,420
The standard is to put cuts about 1" deep in...
The standard is to put cuts about 1" deep in slabs of 400ft2 or larger. We get a corrugated plastic tube over the pex about 12" long and this bridges the gap. Most of the time we put the breaks under...
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Forum: Renovations & New Construction
03-31-14, 05:46 AM
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Replies: 588
Views: 502,420
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Forum: Renovations & New Construction
12-18-13, 05:20 AM
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Replies: 588
Views: 502,420
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