ᐅ Installation of the underfloor heating system in the upper floor hallway area
Created on: 22 Jul 2024 11:32
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Dachshund90
Hello everyone,
As you can see from the attachment, we are currently installing the underfloor heating. We are a bit uncertain about the next steps for the hallway on the upper floor, so here is an explanation:
The heating circuit manifold (HKV) is located in the master bedroom behind the door. From there, the supply and return lines each run into the children's room. If I don’t run the underfloor heating from the bathroom through the wall to the manifold (which was still possible until now), a third supply and return line would have to go through the hallway.
A separate heating circuit for the hallway would be quite small, as the pipes to the adjacent rooms already take up considerable space.
Additionally, the hallway on the ground floor is also heated. That leads me to wonder how the hallway on the upper floor can be controlled, since it is actually an open space between the ground and upper floors. I have planned a KNX system with appropriate regulation based on temperature sensors.
Should I simply omit the separate circuit for the upper hallway, since it will naturally warm up from below and the supply and return lines will also heat the hallway somewhat? Or should I install a separate circuit? Or will the floor become too cold in areas where there are no supply and return lines?
If I do add a small heating circuit, how would the control work? In theory, the two hallways would then be "working against each other."
Thanks for your answers and best regards!
As you can see from the attachment, we are currently installing the underfloor heating. We are a bit uncertain about the next steps for the hallway on the upper floor, so here is an explanation:
The heating circuit manifold (HKV) is located in the master bedroom behind the door. From there, the supply and return lines each run into the children's room. If I don’t run the underfloor heating from the bathroom through the wall to the manifold (which was still possible until now), a third supply and return line would have to go through the hallway.
A separate heating circuit for the hallway would be quite small, as the pipes to the adjacent rooms already take up considerable space.
Additionally, the hallway on the ground floor is also heated. That leads me to wonder how the hallway on the upper floor can be controlled, since it is actually an open space between the ground and upper floors. I have planned a KNX system with appropriate regulation based on temperature sensors.
Should I simply omit the separate circuit for the upper hallway, since it will naturally warm up from below and the supply and return lines will also heat the hallway somewhat? Or should I install a separate circuit? Or will the floor become too cold in areas where there are no supply and return lines?
If I do add a small heating circuit, how would the control work? In theory, the two hallways would then be "working against each other."
Thanks for your answers and best regards!
D
Daniel-Sp22 Jul 2024 18:13You don’t need to run the warm supply line for the bathroom circuit with extra bends through the hallway. It’s better to use the cooler return line for the additional bends. If the bathroom is meant to be warmer than the rest of the house, hopefully an underfloor heating system or wall heating is planned as well? What type of heat generator is planned?
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Dachshund9022 Jul 2024 18:54nordanney schrieb:
First, you lose one or two meters (yards). That is negligible. Otherwise, you have a calculation that can be adjusted if the bathroom needs to emit particularly high heat.
What is the exact design? Please share the data and the actual installation plan. Then it will be easier to give advice. For the hallway, the pipes are specified just like for any other room.
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Dachshund9022 Jul 2024 18:55Daniel-Sp schrieb:
You don’t need to run the warm supply line of the bathroom circuit through extra bends in the hallway. It’s better to use the cooler return line for the additional bends. If the bathroom is supposed to be warmer than the rest of the house, hopefully, an additional wall heating system is planned?
What type of heat source is planned? I have planned an electric towel radiator. There is a geothermal borehole with a Bosch heat pump.
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Daniel-Sp22 Jul 2024 19:06You can also combine the walk-in closet and hallway, which would result in similar pipe lengths for all heating circuits. This would greatly simplify the hydraulic balancing. ERR (energy-related requirements) are, I believe, only mandatory for rooms of at least 6 square meters (65 square feet). At least, that was the case in 2019.
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nordanney22 Jul 2024 19:12Dachshund90 schrieb:
For the hallway, the wiring is specified just as it is for any other room. And the installation plan including the location of the heating circuit distributor? Changing lengths and reducing the number of circuits affects the hydraulics. This needs to be adjusted. Temperature differential is too high. Supply temperature is too high. Rough planning like "we always do it this way"? What are the room temperatures (hopefully 22/24°C (72/75°F))? Especially with an efficient ground source heat pump, more than basic planning should be done. Otherwise, the costly drilling work might be wasted.
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Dachshund9022 Jul 2024 19:34Daniel-Sp schrieb:
You can also combine the walk-in closet and hallway, so all heating circuits would have roughly the same pipe lengths. This would greatly simplify the hydraulic balancing. ERR, as far as I know, are only required for rooms larger than 6 square meters (65 square feet). At least, that was the case in 2019. Ok, I'll keep that idea in mind.
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