ᐅ New single-family house construction with a gas heating system, but without solar panels
Created on: 29 Jun 2015 17:49
H
Hirsl
Hello everyone,
I have already searched on Google, but I couldn’t find a suitable answer for our specific project.
In short: We want to build a single-family house. It will have a gas heating system, but I want to avoid solar panels, heat pumps, or other alternatives (please don’t question the reasoning behind this).
Here are some key details:
- Single-family house, about 153m² (1646 sq ft) of living space on 2 full floors plus a full basement
- 365 mm (14.4 inch) exterior wall, T10 bricks, possibly T9 bricks
- No KfW funding!
- decentralized ventilation system with heat recovery
- wood stove on the ground floor
Of course, I know that the Energy Act (EEnG) requires a certain percentage of energy consumption to come from renewable sources.
My question is: Under the above conditions, is it sufficient to simply choose an eco-friendly gas tariff from the energy supplier, allowing me to avoid installing solar panels, additional insulation, heat pumps, or similar measures? Or is it mandatory to install solar panels on the roof?
I have already searched on Google, but I couldn’t find a suitable answer for our specific project.
In short: We want to build a single-family house. It will have a gas heating system, but I want to avoid solar panels, heat pumps, or other alternatives (please don’t question the reasoning behind this).
Here are some key details:
- Single-family house, about 153m² (1646 sq ft) of living space on 2 full floors plus a full basement
- 365 mm (14.4 inch) exterior wall, T10 bricks, possibly T9 bricks
- No KfW funding!
- decentralized ventilation system with heat recovery
- wood stove on the ground floor
Of course, I know that the Energy Act (EEnG) requires a certain percentage of energy consumption to come from renewable sources.
My question is: Under the above conditions, is it sufficient to simply choose an eco-friendly gas tariff from the energy supplier, allowing me to avoid installing solar panels, additional insulation, heat pumps, or similar measures? Or is it mandatory to install solar panels on the roof?
Yes, unfortunately, the Renewable Energy Heat Act requires us all to use renewable energy.
The 0.04 m² (0.43 sq ft) refers, for simplicity, to the square meters of heated usable floor area.
Specifically, it refers to the aperture area of the collector, meaning the area where solar energy can be absorbed, not the width of the outer frame.
so long Scarfy
The 0.04 m² (0.43 sq ft) refers, for simplicity, to the square meters of heated usable floor area.
Specifically, it refers to the aperture area of the collector, meaning the area where solar energy can be absorbed, not the width of the outer frame.
so long Scarfy
Hi again,
I also found this on the internet regarding the topic:
"VII. Measures to save energy 1. Measures to save energy are only considered as substitute measures under Section 7, Paragraph 1, Number 2, if, when constructing buildings a) the respective maximum annual primary energy demand is reduced and b) the specific requirements for the thermal insulation of the building envelope according to the energy saving regulations in their currently valid version are each undershot by at least 15 percent."
Accordingly, I can also comply with the energy saving regulations by saving energy (for example through insulation).
What does this mean in practice ... with the 15%?
I also found this on the internet regarding the topic:
"VII. Measures to save energy 1. Measures to save energy are only considered as substitute measures under Section 7, Paragraph 1, Number 2, if, when constructing buildings a) the respective maximum annual primary energy demand is reduced and b) the specific requirements for the thermal insulation of the building envelope according to the energy saving regulations in their currently valid version are each undershot by at least 15 percent."
Accordingly, I can also comply with the energy saving regulations by saving energy (for example through insulation).
What does this mean in practice ... with the 15%?
B
Bauexperte1 Jul 2015 00:49@Lassemann
I already mentioned this in my last post on the subject. A solar system is not currently a mandatory requirement if the criteria are met in other ways. The 15% rule is an alternative.
Regards, Bauexperte
Bauexperte
I already mentioned this in my last post on the subject. A solar system is not currently a mandatory requirement if the criteria are met in other ways. The 15% rule is an alternative.
Regards, Bauexperte
Bauexperte
I thought I had made that clear...
The energy saving regulation requires a specific maximum energy demand per m² (square meter) of living space... how you achieve this doesn’t matter, a reference building is used for comparison. To put it simply, you could have basic glass panes as windows if the rest of the building is insulated well enough to meet the overall requirement.
The requirement for renewable energies comes from the
Law for the Promotion of Renewable Energies in the Heating Sector
(Renewable Energies Heat Act)
Part 2 §5 Para. 1
So this has absolutely nothing to do with the energy saving regulation.
P.S.: I am, of course, referring to the original topic! A gas condensing boiler always requires a renewable energy share, whether solar or otherwise.
So long, Scarfy
The energy saving regulation requires a specific maximum energy demand per m² (square meter) of living space... how you achieve this doesn’t matter, a reference building is used for comparison. To put it simply, you could have basic glass panes as windows if the rest of the building is insulated well enough to meet the overall requirement.
The requirement for renewable energies comes from the
Law for the Promotion of Renewable Energies in the Heating Sector
(Renewable Energies Heat Act)
Part 2 §5 Para. 1
So this has absolutely nothing to do with the energy saving regulation.
P.S.: I am, of course, referring to the original topic! A gas condensing boiler always requires a renewable energy share, whether solar or otherwise.
So long, Scarfy
Scarfy, you do realize that you are contradicting Bauexperte with that, right?
In any case, I agree with Bauexperte that it is possible to use a gas condensing boiler without solar thermal or other renewable energy sources by applying alternative measures (Renewable Energy Heat Act Part 2 §7 paragraph 1 number 2).
Renewable Energy Heat Act Part 2 §7 paragraph 1 number 2:
“The obligation according to §3 paragraph 1 or 2 (to use renewable energies) is considered fulfilled if mandatory measures to save energy are taken in accordance with number VII of the annex to this law.”
Number VII of the annex:
a) The maximum value of the annual primary energy demand AND
b) The requirements for thermal insulation of the building envelope
must be undercut by at least 15% according to the applicable Energy Saving Ordinance.
For a KfW70 house, for example, the annual primary energy demand must be 30% below and the thermal insulation 15% below the standard set by the Energy Saving Ordinance.
So it should definitely be possible.
In any case, I agree with Bauexperte that it is possible to use a gas condensing boiler without solar thermal or other renewable energy sources by applying alternative measures (Renewable Energy Heat Act Part 2 §7 paragraph 1 number 2).
Renewable Energy Heat Act Part 2 §7 paragraph 1 number 2:
“The obligation according to §3 paragraph 1 or 2 (to use renewable energies) is considered fulfilled if mandatory measures to save energy are taken in accordance with number VII of the annex to this law.”
Number VII of the annex:
a) The maximum value of the annual primary energy demand AND
b) The requirements for thermal insulation of the building envelope
must be undercut by at least 15% according to the applicable Energy Saving Ordinance.
For a KfW70 house, for example, the annual primary energy demand must be 30% below and the thermal insulation 15% below the standard set by the Energy Saving Ordinance.
So it should definitely be possible.
B
Bieber08151 Jul 2015 21:10Scarfy schrieb:
A gas condensing boiler always requires a renewable energy component. I have also been told this independently by several builders (of course without reference to any legal regulation).
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