Control question for bath only tubing

Steve_35

We've done whole house radiant tubing jobs but this is our first where we're doing just one room. This is a whole house renovation on a house around 150 years old. We're installing panel radiators every where except an upstairs bath and large closet. This is essentially one room about 11' x 20'.

We won't be using an outside reset on this job. I'm looking for suggestion both to control the water temp into the tubing and to make sure the room heats properly. I'm considering using one of Danfoss' t-stats and floor sensors to control zone valves on the manifold as well as a 3 way mixing valve that will limit the maximum water temperature. Just looking for ideas and other options.

Thanks for any and all suggestions.

Steve_35

What's a reasonable way to control tubing in a smaller area?

We've done whole house radiant tubing jobs but this is our first where we're doing just one room. This is a whole house renovation on a house around 150 years old. We're installing panel radiators every where except an upstairs bath and large closet. This is essentially one room about 11' x 20'.

We won't be using an outside reset on this job. I'm looking for suggestions both to control the water temp into the tubing and to make sure the room heats properly. I'm considering using one of Danfoss' t-stats and floor sensors to control zone valves on the manifold as well as a 3 way mixing valve that will limit the maximum water temperature. Just looking for ideas and other options.

Thanks for any and all suggestions.

Alan(CaliforniaRadiant)Forbes

Danfoss

also makes a wall-mounted valve that's meant to be used where you want a small radiant area on a high temperature system. It's piped on the return of the loop and limits flow, kind of like a TRV.

I've never used one, but it's always intrigued me. Sorry, I don't have a model number. Danfoss: (866)651-0101 toll free

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Mike T., Swampeast MO

Part numbers

Requires three components:

Type FHV-A Room Temperature Controller (assuming you want air temp control): part# 003L1001

Tail pieces and/or union (all ½"): part# 013U0496 (union); 013U8608 sweat; 013U0476 MPT

Type FJVR Operator: part# 003L1040

IF you expect frequent, short run times at high temperature you might want to use the floor temperature sensing model (requires different operator) to prevent the floor from overheating.

John@WattsRadiant

Floor stat

If the bathroom is tiled, keep in mind people generally want their tile floor nice and toasty warm, so it's nice to keep the floor a certain temp. Of course, this may overheat the air temp in the space. If you use a combo floor stat/air stat, or run separate controls in parallel, you can keep the floor a min temp while setting a max air temp so they're not sweating too much:)
Of course, this does nothing to mix down high temp water.
John

Unknown

inexpensively,

try this idea on...

wire the floor circulator to run at the same time as the baseboard zone circulator that it is connected to runs. Adjust the mixer up or down to balance the rooms. This will not keep the floor always hot in the summer, spring, and fall. It works, though.

Noel