ᐅ Gas boiler combined with solar panels or would pellets be a better option?
Created on: 16 Jan 2012 10:59
L
Lexus
Hello everyone,
We are planning to build a house with a secondary apartment this year. In total, about 235 m² (2,530 sq ft) need to be heated. From the beginning, we decided to heat our house with gas. However, according to our architect, a gas boiler alone is not possible because, according to the Renewable Energy Heat Act, at least 15% of the heating energy demand must be covered by renewable energy sources. Is this correct?
If so, we would consider a combination of gas + solar or gas + pellet stove (hydronic) in the living room.
Which combination would you recommend?
Which gas boiler/gas condensing wall boiler with hot water storage would heating specialists recommend to us?
Thank you very much!
We are planning to build a house with a secondary apartment this year. In total, about 235 m² (2,530 sq ft) need to be heated. From the beginning, we decided to heat our house with gas. However, according to our architect, a gas boiler alone is not possible because, according to the Renewable Energy Heat Act, at least 15% of the heating energy demand must be covered by renewable energy sources. Is this correct?
If so, we would consider a combination of gas + solar or gas + pellet stove (hydronic) in the living room.
Which combination would you recommend?
Which gas boiler/gas condensing wall boiler with hot water storage would heating specialists recommend to us?
Thank you very much!
Lexus schrieb:
...I originally only wanted a gas boiler, but now I have to integrate either solar or a stove (pellet or wood) into the system as well. Just a simple question: which "advisors" are helping you? The architect of your general contractor / main contractor? Or only the salespeople? If it’s the latter, they will likely push the cheapest gas condensing boiler without considering the actual demand, plus a basic solar thermal system.
Best regards
M
Micha&Dany19 Jan 2012 06:15€uro schrieb:
But only if you don’t know § 9 of the EEWG! Hello €uro
Well, then please enlighten us poor unknowing folks.
§9 only states that you can waive the solar thermal system if it would involve unreasonably high costs (what qualifies as unreasonably high is not specified) – but solar thermal systems are considered state-of-the-art technology, so they should be reasonable.
Or for buildings under heritage protection / public buildings – which probably doesn’t apply here...
Under what circumstances can I waive the 15% requirement?
Best regards
Micha
Hello,
Sorry, I was just working on an expert report according to §9.
The reference was to the annex of the EEWG (VI 1b) regarding compensatory measures according to §7 No. 2:
"...the specific thermal insulation requirements for the building envelope applicable to the particular building according to the Energy Saving Ordinance in its current version are undercut by at least 15%"
In my opinion, this is the better solution, since the best energy is the energy that is never needed. So investing in better insulation instead of a solar thermal system. It neither requires a pump or controls, nor is it affected by the position of the sun.
Best regards.
Micha&Dany schrieb:
...well, then please enlighten us poor unknowing ones ..
Sorry, I was just working on an expert report according to §9.
The reference was to the annex of the EEWG (VI 1b) regarding compensatory measures according to §7 No. 2:
"...the specific thermal insulation requirements for the building envelope applicable to the particular building according to the Energy Saving Ordinance in its current version are undercut by at least 15%"
In my opinion, this is the better solution, since the best energy is the energy that is never needed. So investing in better insulation instead of a solar thermal system. It neither requires a pump or controls, nor is it affected by the position of the sun.
Best regards.
N
NorbertKoch19 Jan 2012 19:17Hello everyone,
I don’t think this was the answer to the architect’s comment.
According to the architect, the 15% refers to section 5, paragraph 1, which states that at least 15% of the heating energy demand must come from renewable energy sources.
The question from Lexus was therefore not about alternative measures, which are of course allowed under the Renewable Energies Heat Act.
So it’s either 15% from renewable energy or choosing the alternative measures.
Best regards
I don’t think this was the answer to the architect’s comment.
According to the architect, the 15% refers to section 5, paragraph 1, which states that at least 15% of the heating energy demand must come from renewable energy sources.
The question from Lexus was therefore not about alternative measures, which are of course allowed under the Renewable Energies Heat Act.
So it’s either 15% from renewable energy or choosing the alternative measures.
Best regards
N
NorbertKoch20 Jan 2012 16:42Hello Lexus,
You probably mean a tile stove. If so, it should only be used in combination with water jackets that are connected to the heating system via a buffer tank (simply put).
An energy consultant cannot and must not include just a tile stove or a pellet stove used as so-called auxiliary heaters in their calculation.
Regards, Norbert
You probably mean a tile stove. If so, it should only be used in combination with water jackets that are connected to the heating system via a buffer tank (simply put).
An energy consultant cannot and must not include just a tile stove or a pellet stove used as so-called auxiliary heaters in their calculation.
Regards, Norbert
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