Hello everyone,
we are planning to install a Viessmann Vitocal 200 S heat pump. It is also capable of cooling, allowing the room temperature to be lowered via the underfloor heating system. We are building a KfW 40 energy-efficient house.
Is there anything that needs to be considered regarding KfW or BAFA when using this system? Does activating the cooling function have any negative impact on the energy calculation?
Thanks and best regards,
Markus
we are planning to install a Viessmann Vitocal 200 S heat pump. It is also capable of cooling, allowing the room temperature to be lowered via the underfloor heating system. We are building a KfW 40 energy-efficient house.
Is there anything that needs to be considered regarding KfW or BAFA when using this system? Does activating the cooling function have any negative impact on the energy calculation?
Thanks and best regards,
Markus
F
freithelm17 May 2021 21:21Mycraft schrieb:
I would consider active cooling right away and at least have the pipes installed. You don’t need to worry, no, these will not become obsolete. They are just two copper pipes, a 5x1.5 NYM cable, and a condensate drain per indoor unit.Thanks a lot for the tip! I will discuss this with my architect. The copper pipes can probably be installed anywhere, right? Is it allowed to embed the pipes in the thin concrete slab? We will also have a reinforced concrete slab on the upper floor, and the pipes would definitely fit well there. 😉
Thanks in advance!
Schimi179117 May 2021 22:09DaSch17 schrieb:
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In addition, the supply air in summer (before it enters the house) is routed through an underground pipe system on the property to take advantage of the lower temperature below the earth’s surface in summer for additional cooling of the fresh air.
...If I’m not mistaken, this is also done like this by @rick2018.
Yes, we did it that way. However, it only makes sense for certain pipe lengths and depths. Most plots of land today are too small for this. We also have a cooling system for the air (heat pump, cold buffer, chilled water coil…).
Cooling through air only works properly starting at about 5 times air exchange. Typical mechanical ventilation systems for residential use are far from this.
Our entire system is designed for this purpose, so it’s not really a typical example.
For a standard single-family home, I would always recommend a proper climate split system. This was also explained in some earlier comments.
Cooling through air only works properly starting at about 5 times air exchange. Typical mechanical ventilation systems for residential use are far from this.
Our entire system is designed for this purpose, so it’s not really a typical example.
For a standard single-family home, I would always recommend a proper climate split system. This was also explained in some earlier comments.
freithelm schrieb:
Copper pipes can be installed anywhere, right? Is it allowed to embed the pipes in a thin concrete slab? We will also have a reinforced concrete slab on the upper floor, and the pipes would probably fit well there.Sure, however, I would recommend placing the pipes inside a protective conduit in the area of the concrete slab. (A simple PVC conduit is sufficient).