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Old 05-11-2019, 11:48 PM   #1
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Hydronic floor?

Is there any other advantage to having a closed system other than being able to run antifreeze in the line. Won't a closed system require a dedicated pump and heater separate from the house water? I have a 2 loop manifold. Do I really need 2 loops to cover a 3" x 25" area?
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Old 05-12-2019, 05:43 AM   #2
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Are you saying you want to heat with the domestic hot water? If you do you will have to protect it from freezing. The heating system would be very hard to drain.
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Old 05-12-2019, 09:17 AM   #3
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Keep the aluminum heat spreaders close together...like less then 3/4 ".

Area 6 ft wide 12 foot long:
We used 3 parallel loops 1/2 pex to increase flow with low pressure. That way the original webasto tsl17 can be used. Also because each loop is shorter and has less curves it is easier to push the air out.

Post a picture.
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Old 05-12-2019, 12:55 PM   #4
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Originally Posted by joeblack5 View Post
Keep the aluminum heat spreaders close together...like less then 3/4 ".

Area 6 ft wide 12 foot long:
We used 3 parallel loops 1/2 pex to increase flow with low pressure. That way the original webasto tsl17 can be used. Also because each loop is shorter and has less curves it is easier to push the air out.

Post a picture.
Post a pic of what? How about post a pic of yours?
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Old 05-12-2019, 10:18 PM   #5
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Sorry, I assumed you had a plan so that people would be better able to help you. Just tried to give you some help from someone who has implemented hydronic floor heat. You can find pictures from our hydronic floorsetup in our build thread. maybe you learn something??
Good luck.
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Old 05-12-2019, 10:44 PM   #6
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Question

Quote:
Originally Posted by joeblack5 View Post
Sorry, I assumed you had a plan so that people would be better able to help you. Just tried to give you some help from someone who has implemented hydronic floor heat. You can find pictures from our hydronic floorsetup in our build thread. maybe you learn something??
Good luck.
Sorry,I assumed you read the OP. I was asking an opinion between 2 systems to help me decide. When I do I'll have pics to post.
I saw your floor pics and mine will be very similar, only 25' long. I didn't see how your plumbed into the system. I'm looking for more reviews on closed systems and whether it's worth the money?
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Old 05-12-2019, 11:02 PM   #7
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No worry, your question it itself was not clear and or did not make sense..


An open system means only that it is exposed to air.... Closed that it has a expansion tank with over pressure vent.

You can run anti freeze in either system.
Either system requires a pump to pump the liquid, it does not flow by itself.


The 2 loop question is depending on a range parameters that you do not bring up. I tried to my give you my opinion how and why we came to our solution.
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Old 05-12-2019, 11:08 PM   #8
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Quote:
Originally Posted by joeblack5 View Post
No worry, your question it itself was not clear and or did not make sense..


An open system means only that it is exposed to air.... Closed that it has a expansion tank with over pressure vent.

You can run anti freeze in either system.
Either system requires a pump to pump the liquid, it does not flow by itself.


The 2 loop question is depending on a range parameters that you do not bring up. I tried to my give you my opinion how and why we came to our solution.
By closed system (wrong nomenclature?) as I meant it was as a separate system with it's own water supply and heater and pump. A dedicated system, not tied into the house water system. I say 2 loop because I got a deal on a 2 loop manifold thinking the small area I was try to heat it would be sufficient. If it's tied into house water you can't use antifreeze can you? Was there pics of how your hydronic tied into the system?
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Old 05-12-2019, 11:16 PM   #9
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Johan, looking at your floor again, you have a single loop system, double looped on the floor, with one entry and one return. My system will have 2 loops and and each one single looped on the floor. So mine should be more efficient than yours, correct? Actually it should be about the same because I'm having to travel a further distance. How does yours work. Is it a no brainer knowing when it's on or not? Still can't picture where the return goes, is it still drinking water?
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Old 05-12-2019, 11:49 PM   #10
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Marc, according to your definition of close loop ,,,,that is what we have.


dedicated boiler / pump.. at this moment no interaction with domestic hot water or engine coolant.


If you mean with loop ..heat tubing that supports separate areas in your structure then we have two loops.... one single tube in the bedroom area and one triple tube in the living room area (6x12 ft)



In reality the floor heat is not able to heat the bus by itself in temp below 40F. You will need additional fan coils. See Christophers comments in my build thread. An i am very happy that I followed his advise.
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