Here is my system. The main reason I am posting this is to show that you don't have to spend thousands and thousands of dollars to have in floor heat. Some people have more money in copper fittings than I do into my whole system. So try not to laugh or criticize too much, my in floor is as simple as it gets, as cheap as it gets, and works really really well.
The shop is 200 ft away from the boiler, and pex was laid in a trench and then sprayfoamed over.
1000 sq ft, 2 "zones", 16" on center runs, with faucet style valves on each one to help with zone control, although both are wide open and I see no need to change it.
The rest is simple. A 24 volt transformer sends voltage to a digital thermostat on the wall which turns a 24 volt relay on and off, which switches the pump on and off. No heat exchangers are used, boilerwater goes through the floor. A mixing valve has been added to reduce water temp entering the floor from 180 to about 90 degrees.
The bucket is used to purge air out of the system, as my shop is uphill from the boiler bleeding the air out was a challenge.
The shop is 200 ft away from the boiler, and pex was laid in a trench and then sprayfoamed over.
1000 sq ft, 2 "zones", 16" on center runs, with faucet style valves on each one to help with zone control, although both are wide open and I see no need to change it.
The rest is simple. A 24 volt transformer sends voltage to a digital thermostat on the wall which turns a 24 volt relay on and off, which switches the pump on and off. No heat exchangers are used, boilerwater goes through the floor. A mixing valve has been added to reduce water temp entering the floor from 180 to about 90 degrees.
The bucket is used to purge air out of the system, as my shop is uphill from the boiler bleeding the air out was a challenge.
![IMG_0068 [800x600].jpg](/forum/data/attachments/169/169794-69b9198341f8fadef2089ffcf32867e2.jpg)
![IMG_0079 [800x600].jpg](/forum/data/attachments/169/169813-494c1f52ce029591b30ea20e3ca6c658.jpg)