ᐅ New Single-Family Home Built to KfW55 Standard – Which Heating System to Choose?
Created on: 19 Jul 2020 12:19
T
Traube348
Hello everyone,
I have read many articles and would now like to benefit from the extensive knowledge of the members here.
A brief overview of my building project:
- Single-family house with approximately 160sqm (1,722 sq ft) of living space
- No basement, 2 full floors with an unfinished attic
- Relatively large window areas and an open-plan design with a staircase in the living area
- Underfloor heating throughout the house with tile flooring
- KfW 55 standard with timber frame construction
- A wood-burning stove will be installed
Unfortunately, I have little experience in this area and rely on recommendations from others regarding heating.
On the ground floor, we have a utility room of 8sqm (86 sq ft) where we would like to accommodate all the technical equipment.
The builder recommends installing a central ventilation system, which we would like to do.
Now to my question:
There is a gas connection in our building area, and a friend told me we should definitely heat with a gas boiler. To meet the KfW standard, according to the energy consultant, we still need to install 9sqm (97 sq ft) of solar panels on the roof.
A heating engineer friend advises: choose an air-to-water heat pump – split system Weishaupt LS 8-BREK – so you can avoid the solar requirement.
I have requested quotes for both options from different heating engineers, and they come out roughly the same in price.
Since I have heard many statements opposing air-to-water heat pumps, I tend to prefer gas.
However, the main challenge is the limited space in the utility room. In addition to the heating system, the two-flue fireplace, and the ventilation system, the electrical control cabinet as well as the washing machine and dryer are also planned to be located there.
Is there anyone who has faced a similar space issue?
What would you recommend?
Thank you very much in advance for your help.
I have read many articles and would now like to benefit from the extensive knowledge of the members here.
A brief overview of my building project:
- Single-family house with approximately 160sqm (1,722 sq ft) of living space
- No basement, 2 full floors with an unfinished attic
- Relatively large window areas and an open-plan design with a staircase in the living area
- Underfloor heating throughout the house with tile flooring
- KfW 55 standard with timber frame construction
- A wood-burning stove will be installed
Unfortunately, I have little experience in this area and rely on recommendations from others regarding heating.
On the ground floor, we have a utility room of 8sqm (86 sq ft) where we would like to accommodate all the technical equipment.
The builder recommends installing a central ventilation system, which we would like to do.
Now to my question:
There is a gas connection in our building area, and a friend told me we should definitely heat with a gas boiler. To meet the KfW standard, according to the energy consultant, we still need to install 9sqm (97 sq ft) of solar panels on the roof.
A heating engineer friend advises: choose an air-to-water heat pump – split system Weishaupt LS 8-BREK – so you can avoid the solar requirement.
I have requested quotes for both options from different heating engineers, and they come out roughly the same in price.
Since I have heard many statements opposing air-to-water heat pumps, I tend to prefer gas.
However, the main challenge is the limited space in the utility room. In addition to the heating system, the two-flue fireplace, and the ventilation system, the electrical control cabinet as well as the washing machine and dryer are also planned to be located there.
Is there anyone who has faced a similar space issue?
What would you recommend?
Thank you very much in advance for your help.
T_im_Norden schrieb:
Self-sufficiency is a more complex topic.From December to March, over 50% in our case. So, more than half of the consumption is produced, stored, and used by ourselves. Since April, we have not purchased any electricity.
T
T_im_Norden20 Jul 2020 12:59Interesting, how large is your system, what orientation does it have, and where does the live?
T_im_Norden schrieb:
Interesting, how large is your system, what orientation does it have, and where does it reside?7.25 kWp with a 7.7 kW battery storage. Heating is done with an air-to-water heat pump. The system is installed on a house roof, tilted at 38° with full southern orientation, located at almost 1000 m (3280 ft) above sea level in Baden-Württemberg.T
Traube34820 Jul 2020 13:12Wow,
first of all, thank you very much for the many responses. It’s really helpful here. It’s a pity that there are so many different opinions. Since I'm not very keen on optimizing the heating system, my good gut feeling about the gas boiler is basically confirmed.
Regarding the water storage tank: what dimensions are recommended for a household of three people? I have also heard various opinions on this...
first of all, thank you very much for the many responses. It’s really helpful here. It’s a pity that there are so many different opinions. Since I'm not very keen on optimizing the heating system, my good gut feeling about the gas boiler is basically confirmed.
Regarding the water storage tank: what dimensions are recommended for a household of three people? I have also heard various opinions on this...
blackm88 schrieb:
7.25 kWp with a 7.7 kW storage system. Heating is provided by an air-to-water heat pump. The system is installed on a house roof, with a full south-facing orientation, at nearly 1000 m (3280 ft) above sea level in Baden-Württemberg.What are the costs for a system like this? Can it be done for around €20,000?
T
T_im_Norden20 Jul 2020 13:18The south side has better conditions for solar energy.
You have favorable conditions for your photovoltaic system.
You have favorable conditions for your photovoltaic system.