86turbodsl
Well-known member
Keep in mind big delta T's on supply/return also means more variation in floor surface temps. I don't like big delta's in my designs. I shoot for about 20F maybe 25 at the top.
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Radiant Hydronic Tuning Tips...?
- Thread starter Holeshot
- Start date
Keep in mind big delta T's on supply/return also means more variation in floor surface temps. I don't like big delta's in my designs. I shoot for about 20F maybe 25 at the top.
Yea, mine works on a 20F delta. Also, I have the T-stat with both a slab temp sensor and air temp sensor. Since I installed a slab probe into my slab I use that as it's the preferred method. My Tstat displays both readings. TDKart is correct, your slab temp will typically be about 2-3 degrees higher than the air temp.
I also have a switch inside my house so I can turn on the shop radiant from there as well. I pre-heat the shop before I go out there. I also have a wireless temp gauge in the house so I can read the shop air temp and humidity so I know if something has gone whacky.
Last edited:
TNToy
Well-known member
That's pretty slick.I also have a wireless temp gauge in the house so I can read the shop air temp and humidity so I know if something has gone whacky.
What does everyone like for t-stats (preferably 802.11x WiFi enabled)?
For the sake of simplicity, I'd love to use a line voltage t-stat...but having the ability to control and track runtime is needed.
What is a typical return temp when the slab surface is say 65°F?
Thanks again, gents!
Beers,
Matt
For the sake of simplicity, I'd love to use a line voltage t-stat...but having the ability to control and track runtime is needed.
What is a typical return temp when the slab surface is say 65°F?
Thanks again, gents!
Beers,
Matt
kabinenroller
Well-known member
I also have a wireless thermometer in the house that monitors the temp. in the shop. 145' from sensor in the shop to the house unit. It works just fine even with metallic window shade down on the only window on the front fascia of the building.
Jackfre,
In this equation: At 2.3 gpm x say a 20* delta T x500 =23,000 btu input. Where does the 500 value come from ?
The 500 is a constant base upon the specific heat of water. That value would change if you have glycol in the system.