KfW 55 + BAFA Funding - Costs and Subsidies

  • Erstellt am 2020-05-18 13:48:15

exto1791

2020-05-18 14:47:58
  • #1


At the moment, I am also very, very ignorant regarding ventilation. Do I necessarily need a ventilation system in connection with an air-to-water heat pump? Can you choose between central and decentralized ventilation here? Do I even need any of this?

Assuming the company would offer me the Wolf CHA monoblock including installation, which is therefore subsidized by BAFA, then I would never come close to even 20k, right? What was offered to me here is quite dubious...
 

T_im_Norden

2020-05-18 14:52:29
  • #2
You need some form of ventilation, even if it is [Fensterfalzlüftung].

Therefore, you do not need controlled residential ventilation with heat recovery, but the consensus is clear,
almost everyone who has one would build it again.
 

exto1791

2020-05-18 15:03:37
  • #3
Why do I necessarily need a controlled residential ventilation system? Is it because of the heat pump? With underfloor heating using gas/oil, there was no controlled residential ventilation either. Sorry if my question sounds stupid.
 

T_im_Norden

2020-05-18 15:09:57
  • #4
It does not have to be a controlled residential ventilation and it has nothing to do with the heat pump. Search the web for Fensterfalzlüftung and for Lüftung im Neubau vorgeschrieben. You will then get information about it.
 

Tarnari

2020-05-18 15:10:13
  • #5
Primarily because modern houses are as airtight as a plastic bag. Secondly, because hardly anyone can ventilate as they should.
 

exto1791

2020-05-18 15:42:51
  • #6
In principle, I have to install one of the 3 ventilation types:

1. window rebate ventilation
2. central ventilation
3. decentral ventilation

Central and decentral ventilation is also required, right?

Central ventilation is certainly the best, isn't it? Window rebate ventilation is certainly the cheapest but worst...

I was also optionally offered 1x central and 1x decentral ventilation in the quote. Window rebate ventilation was not mentioned anywhere... If I remember correctly, decentral was around 8k and central around 10k. Is that about right? However, I also don't know if that was with heat recovery or without.
 

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