I am thinking of building a garage and was wondering about in floor heat. I know that you should put down sand then styrofoam before putting down the tubing. don't know about the heat,wood,boiler, water heater. Is it possible to bury enough in the ground, like a ground source heat pump, tojust pump ground heat water through it in the winter keeping it say 50 degrees inside. How much tubing would that take if possible?
- Thread starter gregk
- Start date
Anonymous-0
Well-known Member
have two shops one 60x80 other 35x45 heat both with in floor heat and heated with outdoor wood boiler also heat house with same stove. run pex on 6 inch centers first one i did was on 8 in. and it dose not work as well make sure you use a mixing valve so your water is around 100 degs. going to the floor i also have a hot water to air heat exchanger to heat things up fast after the door is opened [20x16 over head and at -25 things cool off fast. in the big shop i have 16 runs in the small 12 i think floors are 5in thick and run 30 ton stuff in and out with no cracking. it is very expensive to install but the pay back is the comfort of a warm floor and in winter my plow trucks always melt of 100% over night
Anonymous-0
Well-known Member
If your talking a full blown Geo Thermal set up your looking right at $18,000. That's what the one we just put in a customers new house ran. That price included the duct work which you wouldn't need but you need to get it to your tubes somehow and I'm not sure it can be done. The water in the system is on a closed loop so you would need to somehow heat a storage tank and then pump it to your tubing. The heating contractor and I tried to figure it out too but didn't come up with anything. A water heater and circulating pump will do just fine. Use 2 inch high density foam under the floor though.
there is several things you can do. you can do geo-thermal heat pump, which is expensive, or a water heater/storage tank, but for a garage, you will be heating water you wont always need to be hot, unless you can use the hot water from your house water heater. or you can go to an ondemand water heater or boiler. that way when you dont need the floor heated, no water is being heated.
the cheapest route, unless you have one of these systems already, woudl be to use your hot water from the house, if its connected to the house. that way if u need to upgrade that water heater, the house benefits too.
there is always solar wayer heating. i am going to install a thermal water heater in my house, it has a soalr elect panel on it, so the pump that pumps the water through the system will be solar run and wont need grid elect. but down side is no active heat at night, just carry over.
the cheapest route, unless you have one of these systems already, woudl be to use your hot water from the house, if its connected to the house. that way if u need to upgrade that water heater, the house benefits too.
there is always solar wayer heating. i am going to install a thermal water heater in my house, it has a soalr elect panel on it, so the pump that pumps the water through the system will be solar run and wont need grid elect. but down side is no active heat at night, just carry over.
sorry missed what you asked. that is possible. to just run tubing through the cement and into the ground to just keep the cement at below ground level temp. best people to ask that might be someone who installs geo-thermal. cause all you need to know is for your area, how deep you have to dig to get steady in ground temp and how much tubing for the in ground exchange and the amount needed in the cement for bypass heating. but u might have to run the pump all the time to maintain the temp.
sounds logical.
sounds logical.
Anonymous-0
Well-known Member
Don't think that will work to well. The water temp from the system we put in is at 48 degrees as it operates now. This is drawn from wells 160 feet deep.
I guess my main concern is that I am aware that the expense of heating that way is that it takes alot to bring the floor up to temp but not alot to keep it at temp. so if I just kept it above freezing by using ground temp then I could always supplement it if I wanted with wood, electricity, gas or whatever when I was using it
Anonymous-0
Well-known Member
If you have the garage insulated and the floor is insulated, any heat you put in it will keep the floor warmer than any heat you will get by just circulating ground temp water through it. My daughters insulated attached but unheated garage stays above freezing all winter in SD and it can get cold here.
ScottyHOMeY
Well-known Member
Depending how the cost would compare with having a long run of piping to a heat source, could you heat the floor and or a heat sink/storage bed with a few solar panels?
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