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Old 24.11.2020, 10:05
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House engineering plans.

We have been in our house for 25 years, and it was 8 years old at that time so built 1987.

Our heating on two floors is underfloor except for the room over the garage which isn’t heated. The last time someone came to look at the PAC he asked where a third pipe went. It was relatively easy to follow it along the basement ceiling and up into the garage and then up into room over the garage. But there is no sign of it coming into that room. We need to rip up some floorboards and walls to locate the end of that pipe.

I suspect the original buyer decided not to heat that the room but the builder put in the connecting pipe anyway.

I’m looking for ideas on how we avoid too much destruction but get heating into that room. I doubt if the underfloor pipes are there. But we are planning on replacing the ugly carpet with fake parquet at some time.

I do not have the engineering plans that would show the heating system, nor do I have an idea how to find then.
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Old 24.11.2020, 10:23
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Re: House engineering plans.

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We have been in our house for 25 years, and it was 8 years old at that time so built 1987.

Our heating on two floors is underfloor except for the room over the garage which isn’t heated. The last time someone came to look at the PAC he asked where a third pipe went. It was relatively easy to follow it along the basement ceiling and up into the garage and then up into room over the garage. But there is no sign of it coming into that room. We need to rip up some floorboards and walls to locate the end of that pipe.

I suspect the original buyer decided not to heat that the room but the builder put in the connecting pipe anyway.

I’m looking for ideas on how we avoid too much destruction but get heating into that room. I doubt if the underfloor pipes are there. But we are planning on replacing the ugly carpet with fake parquet at some time.

I do not have the engineering plans that would show the heating system, nor do I have an idea how to find then.
Are the pipes metal or plastic? Far easier to locate metal pipes, there is a devise that you can find cables & pipes before drilling holes. Since you can work out about where the pipe should be it should not be too difficult.

Edit this works with PVC pipes too https://www.ebay.co.uk/itm/Wall-Scan...Cclp%3A2334524
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Old 24.11.2020, 10:24
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Re: House engineering plans.

If you want underfloor heating you'll need two pipes to get the flow out and back.

It would be odd to have just one heating pipe fitted since it's completely useless, is it possible it's a cold water pipe, which would be an obvious thing to route in the direction of the garage?
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Old 24.11.2020, 10:25
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Re: House engineering plans.

Don't you have the architectual plans? Should also be there in my experience or at least gives an idea. Do you know the architect firm?, or the builder? , maybe reach out to them. In ch, these firms tend to be family run and passed down through generations. There's also some tool that identifies pipes in walls so you don't drill into them, not sure how it works but maybe worth a try. Maybe your commune has an archive of old building plans, or consult the one in Nyon.
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Old 24.11.2020, 11:09
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Re: House engineering plans.

It is a metal pipe, but it is only one coming from the hot water outlet from the PAC. There is no sign of a return pipe to the ‘cold’ input. Curious.

No don’t have the plans. Not ones that shows pipes and cables, that is.

Are their other options to bring heating into this room? As mentioned we plan on replacing the existing flooring, is there something we can put underneath the new fake parquet? I’d hate to use electricity but if it’s more efficient than space heaters it would be a step ahead.
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Old 24.11.2020, 11:14
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Re: House engineering plans.

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It is a metal pipe, but it is only one coming from the hot water outlet from the PAC. There is no sign of a return pipe to the ‘cold’ input. Curious.

No don’t have the plans. Not ones that shows pipes and cables, that is.

Are their other options to bring heating into this room? As mentioned we plan on replacing the existing flooring, is there something we can put underneath the new fake parquet? I’d hate to use electricity but if it’s more efficient than space heaters it would be a step ahead.
Where are the actuators for your underfloor heating - is it modern enough to have them on a central manifold, or do you have individual mechanical thermostats in the rooms?

If the latter you could just take a spur off the flow for an existing room, which if the work is being done in the garage and then up through the floor shouldn't be too disruptive.

Electric underfloor heating is possible, but could be expensive to run depending on how big the room is and how warm generally
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Old 24.11.2020, 11:39
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Re: House engineering plans.

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Where are the actuators for your underfloor heating - is it modern enough to have them on a central manifold, or do you have individual mechanical thermostats in the rooms?

If the latter you could just take a spur off the flow for an existing room, which if the work is being done in the garage and then up through the floor shouldn't be too disruptive.

Electric underfloor heating is possible, but could be expensive to run depending on how big the room is and how warm generally
We have two actuators, one on each floor, and regretfully the one on the 1st floor is already overloaded. I cannot see adding to it. In any case it is 20m or so from the room.
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Old 24.11.2020, 11:56
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Re: House engineering plans.

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We have two actuators, one on each floor, and regretfully the one on the 1st floor is already overloaded. I cannot see adding to it. In any case it is 20m or so from the room.
Sounds like you need an expert to see the situation and provide a plan.

I would think the fact you have the garage space to work with is hopeful - presumably if they run some insulated pipes through your garage that wouldn't bother you.

Another thing to consider is how much headroom you have in the room above the garage, and how thick the floor is - underfloor pipes have to be embedded in the floor, but this can be done by cutting into the existing floor or by adding a thin layer of screed (or a combination). Obviously cutting is very very messy, and may not be allowed for strength reasons.

I guess there are probably newer solutions like very fine pipes and mats even for water heating, but I have no experience of that or idea if they can work together with an existing system.

(Full disclosure, I have no experience of actually having this work done, only the process of working out how to do it in a similar situation in the UK - the cost was prohibitive initially, and then we moved to CH...)
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Old 24.11.2020, 11:58
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Re: House engineering plans.

Apologies I was working from memory. There are two pipes. Can anyone recommend an expert in the La Côte area?
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Old 24.11.2020, 16:08
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Re: House engineering plans.

Low profile underfloor heating is not that expensive (circa Chf250m2), it is not that unusual to have heating pipes preinstalled but not connected in "older houses". You can buy kits out of the UK online and virtually install yourself but they use a smaller diameter pipe so this helps with the build height. Electrical underfloor heating is now banned in a few cantons and as underfloor heating runs at a lower temperature than water radiators they won't heat properly. A split system airconditioner might be an option if you have a place for the outdoor unit.
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