New underfloor heating instead of radiators and controlled residential ventilation; yes or no?

  • Erstellt am 2013-12-13 16:29:45

ypg

2013-12-13 22:57:31
  • #1


But that will then have to end with a controlled residential ventilation system and of course contradicts KFW 55!
 

Bauexperte

2013-12-14 09:12:58
  • #2
Hello,


I would suggest you ask the provider again exactly. KfW 70 with radiators is actually not feasible; at least not without a lot of additional effort. The stated additional cost for the underfloor heating confirms this suspicion, as it is much too high if the other parameters for KfW 70 are correct.

Regardless of the fact that you can install the underfloor heating with individual room control, it is extremely unhealthy to sleep at night with the window open – especially at low outside temperatures. Try Aunt Google and you will be surprised what you can catch with constantly open windows.


Sorry, but a lot of this is not right. Either you did not listen properly to the seller or he found a good victim in you. KfW 55 is not available that cheaply – not even in Lower Saxony – as if it could be done with just underfloor heating and controlled residential ventilation.

Rhineland regards
 

Heisenberg

2013-12-16 00:11:58
  • #3
The house costs €152,000 gross without any extras and has the Standard 85. In the wishes, the surcharge KFW 70 (triple glazing and floor insulation) with €4,500 is included. According to the standard, we would have a normal gas condensing boiler with radiators. The €8,000 is the extra cost for a complete underfloor heating system. According to an independent building expert, this is supposed to have the advantage that we only need to heat with about 35 degrees when we heat only with underfloor heating.

I have actually always slept with the window open, all year round. The waterbed also makes it easier for me not to be cold at night. However, I have concerns that the ventilation in the bedroom cannot replace the fresh air of an open window.

The developer is a reputable company that has existed for 30 years and carries out about 150 constructions annually. They have their own energy consultant who will calculate the house on the computer and can tell us whether the measures are sufficient for KFW 55.
 

Mycraft

2013-12-16 07:10:35
  • #4


Well, that's nonsense... they want to make money at your expense... underfloor heating in a new building should cost about the same for purchase and installation as a "normal" heating system, you can ask any reputable plumbing company... they will say the same...



Nonsense again... the controlled residential ventilation system can and will replace the fresh air of a window with the positive side effect that the air is also warmed...
 

€uro

2013-12-16 08:20:34
  • #5
Hello,
Unfortunately, that is a misconception. Some time ago, I completed the planning for a KfW40, with radiators!
The option does not actually exist. ERR (individual room control) is required according to the Energy Saving Ordinance.
At best, a justified exemption application can be submitted.

Best regards
 

FWIng

2013-12-16 08:38:25
  • #6
How glad I am that I am not building through a developer but awarding all trades individually and myself...

Just for you as a reference, I awarded last week:

175 sqm underfloor heating system = 7,000 euros + VAT

Controlled residential ventilation with central supply and exhaust air = 6,000 euros + VAT
 

Similar topics
03.03.2012Position controlled residential ventilation in the underground basement?16
13.06.2012Underfloor heating and mechanical ventilation with heat recovery (MVHR), replacement of ordinary radiators23
05.07.2012Controlled residential ventilation - yes or no14
09.07.2012Developer offer for single-family house - Are the construction costs acceptable?16
27.02.2013Controlled residential ventilation or regulated air - experiences?14
24.07.2013Additional costs due to underfloor heating11
05.11.2014Underfloor heating Yes or No?32
06.11.2015Set controlled residential ventilation KFW 70 with underfloor heating18
15.09.2022Central controlled residential ventilation with heat recovery: Are rooms individually controllable?20
27.11.2015Control climate with underfloor heating or via the ventilation system?66
10.12.2015Proper drying / tilting the window?24
10.01.2022Question about everyday life with a controlled residential ventilation system58
09.09.2016Controlled residential ventilation and still open windows at night71
23.09.2016Noise in the outdoor area with controlled residential ventilation - noise regulation regarding time?18
03.10.2016Reed contact alarm system window. How did you solve that?12
10.09.2017Preparation for central controlled residential ventilation system14
08.10.2017KfW 55 without underfloor heating38
10.02.2018Controlled residential ventilation or photovoltaic system? Seeking decision support, pros/cons18
06.06.2019Cooling in summer with air-to-water heat pump, underfloor heating and/or ventilation system?29
22.10.2018Underfloor heating distance to balcony doors19

Oben