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.
nordanney schrieb:
With the roughly 30€ per month you calculated, you can heat the entire house including hot water with a heat pump. Well, that’s quite optimistic. Currently, I need about 2 to 3 kWh per day for hot water in summer. That’s around 18 euros per month. In winter, when heating is running, there are months when the system uses 25 kWh daily, which adds up to 800 kWh monthly and thus about 160 euros. The annual average is closer to 60 euros per month. This is now in an optimized state. Before handover with the house builder, we were at an annual average of about 100 euros per month.
Ok, we heat 170 m² (1,830 ft²) plus the basement, but that’s not exactly economical. The latest modulating heat pump on the market.
T
T_im_Norden23 Jul 2020 07:08Would anyone really notice the difference between 21°C (70°F) and 24°C (75°F)?
Otherwise, consider installing an infrared mirror in the room; it heats up faster, and with the savings compared to an electric underfloor heating system, you could operate the mirror for 50 years.
Otherwise, consider installing an infrared mirror in the room; it heats up faster, and with the savings compared to an electric underfloor heating system, you could operate the mirror for 50 years.
T
T_im_Norden23 Jul 2020 07:11In the optimized state?
Hot water circulation and poor design of the underfloor heating?
Hot water circulation and poor design of the underfloor heating?
DaSch17 schrieb:
That's correct. Even I’m not convinced by my calculation... There are fundamental misunderstandings of the thermodynamics of a house throughout. Especially if you are considering installing such systems in a new build.
Design and install a water-based low-temperature underfloor heating system throughout the house according to your requirements. Then heat it with a heat pump or gas boiler.
Use the low-temperature underfloor heating system for cooling in summer, combined with shading.
Similar topics