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?
Hello everyone,
Attached is the quote from the heating specialist for the ventilation system, heating, and rough-in plumbing.
From your perspective, is this generally acceptable? Does the price-to-performance ratio seem reasonable?
According to the heating specialist, the final sizing of the ventilation system still needs to be completed.
At first glance, it seems very affordable. So, for ventilation, heating, and rough-in installation a total of 39,500 EUR minus approximately 11,000 EUR BAfA funding.
For the sanitary fixtures, including installation, we have allocated an additional budget of 18,000 EUR.
Ventilation system
Attached is the quote from the heating specialist for the ventilation system, heating, and rough-in plumbing.
From your perspective, is this generally acceptable? Does the price-to-performance ratio seem reasonable?
According to the heating specialist, the final sizing of the ventilation system still needs to be completed.
At first glance, it seems very affordable. So, for ventilation, heating, and rough-in installation a total of 39,500 EUR minus approximately 11,000 EUR BAfA funding.
For the sanitary fixtures, including installation, we have allocated an additional budget of 18,000 EUR.
Ventilation system
The uniSTOR is designed only for domestic hot water, which is fine. However, I’m a bit surprised by the heating capacity of the offered heat generators and the fact that two devices with different outputs are being offered. The heating engineer should know which one fits best.
I would also recommend installing an external current anode for the tank. It’s inexpensive, but gives you peace of mind forever.
I would also recommend installing an external current anode for the tank. It’s inexpensive, but gives you peace of mind forever.
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