ᐅ Planning Heating and Ventilation Systems for a KfW 40 Plus Single-Family Home
Created on: 30 Sep 2020 09:56
D
DaSch17
Hello everyone,
We have a planning meeting with the heating and ventilation engineer scheduled for October/November.
In preparation, I have been wondering what I should pay special attention to and what is important. I hope to receive some valuable planning tips for this very important trade.
Brief key information about the planned new build:
- 2 full floors, clear structural height per floor 2.85 m (9 ft 4 in)
- KfW 40 Plus standard
- Heated living area approximately 190 m² (2045 ft²)
- Additional heat source: fireplace in the living/dining/kitchen area about 60 m² (645 ft²)
- Floor plan: see post #254 in https://www.hausbau-forum.de/threads/efh-neubauvorhaben-von-tag-1-an-und-die-planung-beginnt.33766/page-43
The following information and requirements (in addition to the planning documents) have already been sent to the heating/ventilation engineer:
Heating technology:
- Split air-to-water heat pump or ground-source (brine-to-water) heat pump
- Eligible for BAFA funding
- Underfloor heating in all rooms (except garage with storage room) with a target temperature of 21-22°C (70-72°F) in all rooms and 22-23°C (72-73°F) in the bathrooms
- Smart grid compatible (for using photovoltaic electricity)
- Cooling function if possible
- Hot water storage tank sized for a household of 4 persons
Controlled residential ventilation:
- Cooling function or summer bypass
What should I pay special attention to? What tips do you have?
We have a planning meeting with the heating and ventilation engineer scheduled for October/November.
In preparation, I have been wondering what I should pay special attention to and what is important. I hope to receive some valuable planning tips for this very important trade.
Brief key information about the planned new build:
- 2 full floors, clear structural height per floor 2.85 m (9 ft 4 in)
- KfW 40 Plus standard
- Heated living area approximately 190 m² (2045 ft²)
- Additional heat source: fireplace in the living/dining/kitchen area about 60 m² (645 ft²)
- Floor plan: see post #254 in https://www.hausbau-forum.de/threads/efh-neubauvorhaben-von-tag-1-an-und-die-planung-beginnt.33766/page-43
The following information and requirements (in addition to the planning documents) have already been sent to the heating/ventilation engineer:
Heating technology:
- Split air-to-water heat pump or ground-source (brine-to-water) heat pump
- Eligible for BAFA funding
- Underfloor heating in all rooms (except garage with storage room) with a target temperature of 21-22°C (70-72°F) in all rooms and 22-23°C (72-73°F) in the bathrooms
- Smart grid compatible (for using photovoltaic electricity)
- Cooling function if possible
- Hot water storage tank sized for a household of 4 persons
Controlled residential ventilation:
- Cooling function or summer bypass
What should I pay special attention to? What tips do you have?
I have another question:
The heating engineer said we could already submit a BAFA funding application. This would not cause us any disadvantages, and we could thus definitely secure the 35% subsidy. After submitting the application, we would have 24 months to submit the invoices.
Is that correct? By submitting the application, do we secure the funding until the end of the year and really have no disadvantages because of it?
The heating engineer said we could already submit a BAFA funding application. This would not cause us any disadvantages, and we could thus definitely secure the 35% subsidy. After submitting the application, we would have 24 months to submit the invoices.
Is that correct? By submitting the application, do we secure the funding until the end of the year and really have no disadvantages because of it?
DaSch17 schrieb:
At first glance, it seems very affordable to me. So, for ventilation + heating + basic installation a total of 39,500 EUR minus about 11,000 EUR BAfA subsidy.
For the sanitary fittings, we’ve allocated another 18,000 EUR including installationMy gut feeling was probably right. The general contractor sent an updated offer. There was apparently a mistake in the first quote for the heating installation.
We now have a total of 42,700 EUR including 19% VAT for ventilation + heating + basic installation. Plus an additional fee of about 5% for the general contractor (contracting the subcontractor through the general contractor), so the total comes to around 44,800 EUR.
Regarding the BAfA subsidy, I am currently budgeting 9,500 EUR.
From experience, how much should one generally expect to pay for the sanitary fittings? When we first visited the bathroom showroom, I almost had a stroke from the prices...
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nordanney1 Dec 2020 15:57DaSch17 schrieb:
When we first visited the bathroom showroom, I almost had a stroke because of the prices...It doesn’t get any better the second time around. The only way is if you install the toilets and sinks yourself (which I would always do).
Hmm, do your figures include underfloor heating?
My heating engineer quotes me about 36k for ventilation and heat pump. Of course, this topic is about KFW40+ and we only have 55, but the building services should actually be cheaper due to lower energy demand. Especially since the design of the underfloor heating does not count.
My heating engineer quotes me about 36k for ventilation and heat pump. Of course, this topic is about KFW40+ and we only have 55, but the building services should actually be cheaper due to lower energy demand. Especially since the design of the underfloor heating does not count.