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pachai · 11-17-11, 01:41 AM

I have been working on the hydronic floor recently,
and today I tested something.
I may not have learned anything.

I have 600' of radiantec 1/2" O2 barrier stapled
under the floor of a 400 SF area. Below is finished,
will be heated soon.

I tested the pipes under the second floor at 80 PSI air.
I did not schlep the compressor up, I did it with a good bike pump. I had tested it at 30PSI and had seen a
bit of loss every day.

It held an hour at 80 PSI, so I connected it
to the hot water tap, let it run until I saw the pipes
at 125 degrees. (I have a Flir Infrared camera).

I shut the OUT to let pressure build,
then after a bit shut the in.

Using the camera, I did not see any statistically
significant difference in temperature where the
pipes ought to be.

I have seen discussions, I gather
the water has to be moving.

I did see a 25 degree (F) difference between the
first pipe in line and the last pipe before the sink.
The heat must be going somewhere (?!)
(125 degrees in, 99 degrees out)

In the bath, there is a loop in the wall for
a future towel rack. It looked like there might
have been a trace of evidence - a 4" strip
that was 2 degrees higher.

I took pics, but it is hours past my bedtime.
Also, phone USB not working.

11-17-11, 01:41 AM	#166
pachai Renovator-in-planning Join Date: Oct 2010 Location: Northern NJ Posts: 85 Thanks: 6 Thanked 0 Times in 0 Posts	I have been working on the hydronic floor recently, and today I tested something. I may not have learned anything. I have 600' of radiantec 1/2" O2 barrier stapled under the floor of a 400 SF area. Below is finished, will be heated soon. I tested the pipes under the second floor at 80 PSI air. I did not schlep the compressor up, I did it with a good bike pump. I had tested it at 30PSI and had seen a bit of loss every day. It held an hour at 80 PSI, so I connected it to the hot water tap, let it run until I saw the pipes at 125 degrees. (I have a Flir Infrared camera). I shut the OUT to let pressure build, then after a bit shut the in. Using the camera, I did not see any statistically significant difference in temperature where the pipes ought to be. I have seen discussions, I gather the water has to be moving. I did see a 25 degree (F) difference between the first pipe in line and the last pipe before the sink. The heat must be going somewhere (?!) (125 degrees in, 99 degrees out) In the bath, there is a loop in the wall for a future towel rack. It looked like there might have been a trace of evidence - a 4" strip that was 2 degrees higher. I took pics, but it is hours past my bedtime. Also, phone USB not working.