ᐅ Passive house, combined heating system with solar thermal, energy recovery, photovoltaic panels?
Created on: 28 Oct 2009 20:56
B
Bunnyguard
So, I plan to have a house built for my family in the near future.
I have decided on a passive house because I want to minimize environmental impact and keep running costs low.
Now I am wondering which heating combinations I should use.
A ventilation system with heat recovery is a must...
Solar energy will be used for domestic hot water in combination with a large buffer tank.
I thought that heat recovery alone might not be enough to maintain the indoor temperature as I want it...
What additional heating options would you recommend?
Geothermal energy? Using solar also for heating? What are the possibilities?
Or is the ventilation with heat recovery sufficient?
I’ve heard that passive houses don’t need extra heating because heat recovery should be enough – is that true?
I’m also thinking about installing some photovoltaic panels on the roof to save even more energy for electrical appliances and the ventilation system’s motors, etc.
What do the experts suggest as a good combination that won’t cause problems, e.g., not keeping the house warm enough?
Many thanks for your help.
PS: Hello to everyone, I’m new here 😀
I have decided on a passive house because I want to minimize environmental impact and keep running costs low.
Now I am wondering which heating combinations I should use.
A ventilation system with heat recovery is a must...
Solar energy will be used for domestic hot water in combination with a large buffer tank.
I thought that heat recovery alone might not be enough to maintain the indoor temperature as I want it...
What additional heating options would you recommend?
Geothermal energy? Using solar also for heating? What are the possibilities?
Or is the ventilation with heat recovery sufficient?
I’ve heard that passive houses don’t need extra heating because heat recovery should be enough – is that true?
I’m also thinking about installing some photovoltaic panels on the roof to save even more energy for electrical appliances and the ventilation system’s motors, etc.
What do the experts suggest as a good combination that won’t cause problems, e.g., not keeping the house warm enough?
Many thanks for your help.
PS: Hello to everyone, I’m new here 😀
Solar energy is used for hot water in combination with a large buffer tank.
- This only works effectively during the appropriate season and saves between €100 and €200 per year, no more. In this case, building component activation is much more important.
What additional heat sources are recommended?
- A domestic ventilation (DV) heat pump, but only a small one, since it serves merely as a backup heater.
- Pellets are too expensive and increasingly uneconomical; already this year, they have become more costly than gas or oil.
I was thinking about installing a few more photovoltaic panels on the roof to save even more, reducing energy costs for electric appliances and the fan motors of the comfort ventilation system, etc.
- That is not worthwhile at all right now, since you currently earn more feed-in tariff than you pay for electricity. It’s also not a good investment.
Covering the electricity for the heating coil with photovoltaics is simply burning money.
Costs can only be assessed once the parameters are known, such as size, equipment, and so on.
Having your father as the construction manager is definitely an advantage because he will likely be continuously on site. I would involve him right away.
However, it seems your father may not be fully up to date with the latest technology; otherwise, you probably wouldn’t have these questions.
Best regards
- This only works effectively during the appropriate season and saves between €100 and €200 per year, no more. In this case, building component activation is much more important.
What additional heat sources are recommended?
- A domestic ventilation (DV) heat pump, but only a small one, since it serves merely as a backup heater.
- Pellets are too expensive and increasingly uneconomical; already this year, they have become more costly than gas or oil.
I was thinking about installing a few more photovoltaic panels on the roof to save even more, reducing energy costs for electric appliances and the fan motors of the comfort ventilation system, etc.
- That is not worthwhile at all right now, since you currently earn more feed-in tariff than you pay for electricity. It’s also not a good investment.
Covering the electricity for the heating coil with photovoltaics is simply burning money.
Costs can only be assessed once the parameters are known, such as size, equipment, and so on.
Having your father as the construction manager is definitely an advantage because he will likely be continuously on site. I would involve him right away.
However, it seems your father may not be fully up to date with the latest technology; otherwise, you probably wouldn’t have these questions.
Best regards
B
Bunnyguard29 Oct 2009 14:05No, he’s not the right person for passive houses, but he is generally very knowledgeable. That’s why I will also bring in an additional builder who specializes in passive houses. It will cost me a bit of money, but they should be able to spot any defects directly during construction, if any occur. Of course, before I pay for any phase 😀
Good Parcus, what would be your solution for warm water in winter?
And for additional heating? So, photovoltaic panels on the roof and feeding electricity back into the grid to cover the extra heating for the ventilation system?
Why wouldn’t it make sense financially to feed electricity into the grid, get credited for it, and then use that electricity to finance heating through the heating coil, for example?
A fireplace is generally not an option because the house has to be airtight.
Pellet stoves are also getting more expensive and not cost-effective.
What remains the best solution?
Good Parcus, what would be your solution for warm water in winter?
And for additional heating? So, photovoltaic panels on the roof and feeding electricity back into the grid to cover the extra heating for the ventilation system?
Why wouldn’t it make sense financially to feed electricity into the grid, get credited for it, and then use that electricity to finance heating through the heating coil, for example?
A fireplace is generally not an option because the house has to be airtight.
Pellet stoves are also getting more expensive and not cost-effective.
What remains the best solution?
And additional heating?
-A small ducted heat pump, which has an annual performance factor over 5.5
So, photovoltaic panels on the roof and feeding electricity into the grid to cover the additional heating for the ventilation system?
-No, only for feeding electricity into the grid. The realistic return is about 3%, don’t be fooled by marketing promises.
Besides, you would become a business operator...
I consider photovoltaic systems separate from the house as an investment.
-A small ducted heat pump, which has an annual performance factor over 5.5
So, photovoltaic panels on the roof and feeding electricity into the grid to cover the additional heating for the ventilation system?
-No, only for feeding electricity into the grid. The realistic return is about 3%, don’t be fooled by marketing promises.
Besides, you would become a business operator...
I consider photovoltaic systems separate from the house as an investment.
B
Bunnyguard29 Oct 2009 14:33Yes, with photovoltaics you supply electricity for a price, which means you receive money each month/year for the electricity you feed into the grid...
Logically, the money I receive is spent again on the electricity I use in the house. That includes the motors of the fans, etc.
Or am I missing something here?
What is a DV heat pump... I don’t know that abbreviation?
Logically, the money I receive is spent again on the electricity I use in the house. That includes the motors of the fans, etc.
Or am I missing something here?
What is a DV heat pump... I don’t know that abbreviation?
B
Bunnyguard29 Oct 2009 15:31Yes, but how else is a photovoltaic system supposed to be used?
The money you earn from it is spent again...
Whether you treat yourself to a vacation or pay your electricity bill with it is up to you.
But it’s better to cover your expenses like electricity, etc., with it.
Or am I misunderstanding something here?
How does such a direct current (DC) heat pump work?
The money you earn from it is spent again...
Whether you treat yourself to a vacation or pay your electricity bill with it is up to you.
But it’s better to cover your expenses like electricity, etc., with it.
Or am I misunderstanding something here?
How does such a direct current (DC) heat pump work?
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