Constant Circulation and Outdoor Reset

scott markle_2

> I have a client who wants to us Hydronic <BR>
> Alternatives' Radiant Panel baseboard. They <BR>
> suggested Constant Circ with O/R. Could someone <BR>
> suggest some simple controls (Tekmar?) that would <BR>
> control this kind of application.<BR>
> <BR>
> So far my <BR>
> experience in the hydronics has been pretty <BR>
> simple.<BR>
> <BR>
> Thanks,<BR>
> <BR>
> Rob <BR>
<BR>
Make sure you have a good heat loss calculation, I believe the output of this product is fairly low, not much surface area, and little or no convective transfer. You need to pick a boiler type before you can select a control. I work exclusively with gas condensing boilers, they are especially well suited to full outdoor reset because of there ability to receive return water at any temperature. They also perform at best efficiency in low temp. applications. Lots of variables though. 270 is the simplest Tekmar offers for this app. Boiler demand contact closed for constant circ. and optional indoor sensor for fine tune of reset curve. Only short coming is user interface which is a bit cumbersome for average person.

Rob Blair

Constant Circ and Outdoor Reset

I have a client who wants to us Hydronic Alternatives' Radiant Panel baseboard. They suggested Constant Circ with O/R. Could someone suggest some simple controls (Tekmar?) that would control this kind of application.

So far my experience in the hydronics has been pretty simple.

Thanks,

Rob

scott markle_2

radiant base

Make sure you have a good heat loss calculation, I believe the output of this product is fairly low, not much surface area, and little or no convective transfer. You need to pick a boiler type before you can select a control. I work exclusively with gas condensing boilers, they are especially well suited to full outdoor reset because of there ability to receive return water at any temperature. They also perform at best efficiency in low temp. applications. Lots of variables though. 270 is the simplest Tekmar offers for this app. Boiler demand contact closed for constant circ. and optional indoor sensor for fine tune of reset curve. Only short coming is user interface which is a bit cumbersome for average person.

Steve Ebels_3

Talk to Paul Ross

Call up Hydronic Alternatives and talk to Paul Ross. He'll give you a straight answer and won't give you a bunch of sales talk just to move product. You can also look them up on the net at www.hydronicalternatives.com. In addition to the radiant panel BB, they have a very complete line of panel rads, Oventrop TRV's and valves plus tubing and fittings.

ALH_4

Radiant Baseboard

I think that baseboard is a really cool idea, but as has already been mentioned, the output is very limited. Also, I would only use these as a constant circulation system, because sudden changes in temperature could definitely create some noise, particularly because relatively high temperatures are required to get significant output. I would lean more toward radiant walls if this is to be the primary heat source.

Rob Blair

Thanks Andrew. I put forth the wall idea to the homeowner but he thinks the radiators will be cool. His choice.

Rob

Rob Blair

Thanks Steve. I was just given this product name by the homeowner. He spoke to Paul in depth about their products. I will be giving him a call.

Rob