[TimSBLI]

I am running hydronic baseboard from a room with a slab to a new room addition with an unheated crawl space. I need to loop the supply or return inside of the baseboard. Everything I read says loop the return line back over the fins. In my case, with the slab it would be easier to loop the supply over the element and avoid making a figure 8. Seems like a silly question but does it make a difference which line I loop inside?

 

[oh'mike]

I moved this to 'HVAC' for you----

We have several members that are expert in hydronic heating--I think you will get a workable solution--Mike---

 

[oh'mike]

I'll bump this for you---

You understand the theory --the cooler return pipe should be under the finned heating pipe--so that heat is not absorbed into the return pipe--

However, the loss is negligible---so I say--do what works.

A real heating expert will be along to tell you I'm nuts---and I'm okay with that.

 

[supers05]

It really shouldn't make a whole lot of difference. I'm assuming that your loop has a pump. Also, match the plumbing to the rest of the system. (there's more then one way to skin a cat when it comes to hydronic loops.)

Cheers!

 

[beenthere]

No real harm in doing it either way. The return is usually looped over the fins because you generally want the hottest water entering the heating element. What little you lose by looping the supply, won't hurt anything. Unless you under sized the baseboard.