ᐅ Air conditioning: Routing refrigerant lines and related components through the vapor barrier
Created on: 5 Apr 2021 17:18
M
MaxMarbelM
MaxMarbel5 Apr 2021 17:18Hello everyone,
I hope you can help me; unfortunately, I couldn’t find anything that specifically answers my question.
It’s about installing a multi-split air conditioning system in a single-family house built in 2016. For this, six refrigerant pipes, three electrical cables, and condensate drain lines need to be routed from the outdoor unit, first through the exterior wall into the upper floor (ETICS / external thermal insulation composite system, hollow brick), then from there onto the cold roof and finally distributed to the individual rooms.
In doing so, the membrane (vapor barrier?) beneath the insulation on the cold roof would need to be penetrated.
I have found collars for the individual cables and pipes, but considering the bundle of six pipes plus cables and so on, I wonder how to properly create the penetration and ensure it is sealed again. Does anyone have any advice on this?
Is it sufficient to fill the remaining cavities around the penetration through the exterior wall into the upper floor with expanding foam and then plaster over it from the outside? This seems to be a common method...
Thank you very much in advance for your advice.
I hope you can help me; unfortunately, I couldn’t find anything that specifically answers my question.
It’s about installing a multi-split air conditioning system in a single-family house built in 2016. For this, six refrigerant pipes, three electrical cables, and condensate drain lines need to be routed from the outdoor unit, first through the exterior wall into the upper floor (ETICS / external thermal insulation composite system, hollow brick), then from there onto the cold roof and finally distributed to the individual rooms.
In doing so, the membrane (vapor barrier?) beneath the insulation on the cold roof would need to be penetrated.
I have found collars for the individual cables and pipes, but considering the bundle of six pipes plus cables and so on, I wonder how to properly create the penetration and ensure it is sealed again. Does anyone have any advice on this?
Is it sufficient to fill the remaining cavities around the penetration through the exterior wall into the upper floor with expanding foam and then plaster over it from the outside? This seems to be a common method...
Thank you very much in advance for your advice.
K
knalltüte5 Apr 2021 17:59The frequency of using well foam does not make it unsuitable for this purpose! “We’ve always done it this way” is also not a valid argument.
Bundles of pipes as well as cable bundles should be avoided so that you can properly seal each pipe or cable individually with a separate sleeve or system adhesive tape all around. In an otherwise very airtight house, even a hole the size of a pinhead can easily transport 1/2 liter (0.13 gallons) of water per hour naturally dissolved in the air.
Bundles of pipes as well as cable bundles should be avoided so that you can properly seal each pipe or cable individually with a separate sleeve or system adhesive tape all around. In an otherwise very airtight house, even a hole the size of a pinhead can easily transport 1/2 liter (0.13 gallons) of water per hour naturally dissolved in the air.
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