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hermostat

tfinniii

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Aug 13, 2013
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124
Location
Balto., Md.
What would be a good thermostat for slab hydronic heat in a pole barn,should I get one with a slab temperature sensor? I probably need a programmable type for delay when opening overhead door also.
 
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yeldogt

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Jan 2, 2012
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The best ones work outside temperature -- they set the temperature of the water. Look up "outdoor reset" .

I have a slab temp sensor in one of my rooms to maintain a warm floor -- not enough to heat the room -- I have supplemental for that -- I just don't want it cold. Slab sensors ar normally to keep the slab from getting too hot.

You can also get a thermostats for radiant that looks just like a normal one -- it has a longer delay to compensate for the slab mass.

Opening a garaged door and closing it will not have any effect on the temp -- it will quickly cover.
 
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tfinniii

Well-known member
Joined
Aug 13, 2013
Messages
124
Location
Balto., Md.
The best ones work outside temperature -- they set the temperature of the water. Look up "outdoor reset" .

I have a slab temp sensor in one of my rooms to maintain a warm floor -- not enough to heat the room -- I have supplemental for that -- I just don't want it cold. Slab sensors ar normally to keep the slab from getting too hot.

You can also get a thermostats for radiant that looks just like a normal one -- it has a longer delay to compensate for the slab mass.

Opening a garaged door and closing it will not have any effect on the temp -- it will quickly cover.

I don't want the heat to come on due to blast of cold air hitting thermostat before I close door.
 

Rookie2

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Feb 27, 2013
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Location
Western Pa.
do a search on here someone had installed a thermostat cut out switch when the door is opened.
 
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yeldogt

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Jan 2, 2012
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a radiant thermostat will not do that .. they have a built in delay .. and you don't place the thermostat by the door. Th mass of the floor quickly recovers.

This is not a problem -- the only time you would need a cut off is if the door was open for a long tine
 
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tfinniii

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Aug 13, 2013
Messages
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Location
Balto., Md.
Again I am asking for a suggestion for a thermostat. I WAS NOT GOING TO PLACE THERMOSTAT BY DOOR!,just asking about the delay when it's cold and wind may be blowing in bldg. and how long do the radiant thermostats have a delay for.
 

yeldogt

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Jan 2, 2012
Messages
18,184
My systems all use outside reset and the thermostat is just a modifier ... google radiant thermostats -- you can buy them from many places. I only have one house with thermostats. Having a radian system turn on and off is really not the way they work best.

What you need all depends on how you set it up. My studio does not have thermostat. The floor is warmed based on the outside temp. Once you set up a radiant system -- it provides heat based on the time of day and the outside temp. Once my garage door closes the mass of heat in the floor quickly returns the room to the desired temp. Radiant systems can't heat up and down based on a door being opened for a short period.

One of my houses has a few odd rooms. One room has a lot of glass -- so I have a thermostat that will lower the water flow to that room when the sun hits it. Another part of the house is stone with less insulation and older historic windows -- so I have a thermostat that will tell he system to increase the water temp to that area -- this is needed on windy days.
 
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