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Hi Everyone, I just wanted to post an update and thank everyone who weighed in on this thread. We're going with a 6" maximum tubing depth. For me, that's the best tradeoff between system performance and eliminating the possibility of damage from post-installed anchors. I know some will...

The calculated steady-state load was about 155 BTU/(hr*ft^2) which is 0.315 W/in^2 Is the value of 1 W/in^2 for an aircraft in flight?

TBP, Thanks for the heads up. I found it in the HVAC Applications Handbook. The 1995 ed. has some good information (although nothing on transient analysis). I'm looking into ordering the latest copy. IRstuff, Because of the post-installed anchors, the tubing can't be very close to the surface...

Thanks Ed, that's about what I've gathered. The slab is going to have some complex rebar which is why I'm trying to justify installing it underneath. It will have some post-installed anchors as well which require 4"+ deep holes drilled after the tubing is encased in concrete. Those are the...

I'm planning on heating a new concrete slab foundation at an industrial facility using an existing 50% water/glycol source. The purpose of the hydronic heating is for snow melt. I'm trying to calculate the time it would take to raise the surface temperature of the slab to 40deg F for a few...