Hello.
Since the 2014 Energy Saving Ordinance will apply from next year, I have a few questions.
We are planning to build a single-family house next year or the year after and are currently still looking for a suitable plot of land. Nevertheless, we are already considering the design of the house and thinking about what we want and what we don’t.
What we want is a gas heating system with underfloor heating and a fireplace stove with passive warm air distribution to the upper floor.
We are still unsure about a controlled ventilation system with heat recovery. This would make the fireplace stove more expensive because it would have to be air-independent.
What are the experiences with noise?
Are there noise bridges?
Can you hear the ventilation?
Is it possible to use the ventilation to capture warm air from the fireplace and then distribute it throughout the house via heat recovery, or bring it to the rooms being ventilated?
What we don’t want is a solar system for hot water preparation.
Is it possible to comply with the 2014 Energy Saving Ordinance with a gas heating system without solar?
Best regards
Rafaelsen
Since the 2014 Energy Saving Ordinance will apply from next year, I have a few questions.
We are planning to build a single-family house next year or the year after and are currently still looking for a suitable plot of land. Nevertheless, we are already considering the design of the house and thinking about what we want and what we don’t.
What we want is a gas heating system with underfloor heating and a fireplace stove with passive warm air distribution to the upper floor.
We are still unsure about a controlled ventilation system with heat recovery. This would make the fireplace stove more expensive because it would have to be air-independent.
What are the experiences with noise?
Are there noise bridges?
Can you hear the ventilation?
Is it possible to use the ventilation to capture warm air from the fireplace and then distribute it throughout the house via heat recovery, or bring it to the rooms being ventilated?
What we don’t want is a solar system for hot water preparation.
Is it possible to comply with the 2014 Energy Saving Ordinance with a gas heating system without solar?
Best regards
Rafaelsen
B
Bauexperte22 Oct 2015 12:42Hello,
You are using the ostrich strategy if you ignore extraction, transport, losses (the former Soviet Union and North America each produce about a quarter of the world’s supply), as well as the risks involved in natural gas production (including offshore). I don’t even want to start the discussion on fracking....
**Assuming current natural gas consumption remains constant, the known natural gas reserves would be depleted in 60 years. At the current consumption growth rate of 2.8% per year, the supply would last only 36 years.
**Source: Regenerative Zukunft
Regards, Bauexperte
Passivhaus schrieb:Ah – and the pump in your gas condensing boiler runs on air and love?
Heat pumps consume a lot of electricity,
Passivhaus schrieb:The share of renewable electricity generation has increased significantly; as a result, the primary energy factor for electricity was reduced to 1.8 starting January 2016.
which mostly comes from nuclear power or fossil fuels and due to losses during production only one third reaches the end customer. I’m not sure how that is supposed to be more environmentally friendly.
You are using the ostrich strategy if you ignore extraction, transport, losses (the former Soviet Union and North America each produce about a quarter of the world’s supply), as well as the risks involved in natural gas production (including offshore). I don’t even want to start the discussion on fracking....
**Assuming current natural gas consumption remains constant, the known natural gas reserves would be depleted in 60 years. At the current consumption growth rate of 2.8% per year, the supply would last only 36 years.
**Source: Regenerative Zukunft
Regards, Bauexperte
R
Rafaelsen22 Oct 2015 13:02Bauexperte schrieb:
Hello,
Ah – so the pump of your gas condensing boiler runs on air and love?
The share of renewable electricity generation has increased significantly; as a result, the primary energy factor for electricity will be reduced to 1.8 from January 2016.
You are following an ostrich strategy if you ignore production, transport, losses (the US and North America each account for about a quarter of global production), as well as the risks involved in natural gas extraction (including offshore). I won't even mention fracking in this discussion....
**Assuming that current natural gas consumption remains constant, the known natural gas reserves would be exhausted in 60 years. With the current annual consumption growth rate of 2.8%, the supply would only last 36 years.
**Source: Regenerative Zukunft
Regards, BauexperteHello Bauexperte.
This is not the topic here.
Moreover, your explanations about natural gas and its availability are quite misleading.
The lifetime of raw material reserves is always given as a static figure. That is what you did with the 60 years.
If you applied a dynamic approach (taking into account the consumption growth rate you mentioned), the lifetime of natural gas reserves could actually be estimated at around 1000 years, oil 300 years, coal 2000 years, and uranium 30,000 years.
Reserves and resources are two different concepts.
Reserves are deposits that are economically recoverable based on current technology. Resources, on the other hand, are deposits that are proven to exist but cannot currently be economically extracted. Fracking, which has been practiced in Germany for over 60 years, is one reason for shifting resources into reserves.
And for gas, the primary energy factor is also around 1.1, which covers transport, processing, etc.
B
Bauexperte22 Oct 2015 13:18Hello,
I’ll skip commenting on the rest, as it would lead this thread off-topic. What mattered to me—and the only reason I replied about ‘Passive House’—is that there are no benefits without drawbacks.
Regards, Bauexperte
Rafaelsen schrieb:Yes, that’s why I should have added that for the sake of completeness.
Reserves and resources are two different perspectives.
I’ll skip commenting on the rest, as it would lead this thread off-topic. What mattered to me—and the only reason I replied about ‘Passive House’—is that there are no benefits without drawbacks.
Regards, Bauexperte
B
Bieber081522 Oct 2015 20:57Rafaelsen schrieb:
The additional cost for KfW 70 with gas compared to KfW 70 with heat pump was still 4,000 € This probably does not include ancillary construction costs. In our case (with a developer, so including all extra costs), gas (+ solar thermal) would have been at best the same price or more expensive than an air-to-water heat pump — or the developer was just too lazy to do the calculations. Either way, you can deduct the gas connection fee from the above 4,000 euros (unless you need it for cooking ...). And with KfW 70 using an air-to-water heat pump, you don’t need solar thermal, which also adds significant costs. Heat pumps aren’t that expensive after all.Or... your supplier designs the underfloor heating differently for gas and saves money there, but that’s really not what you want....
M
michisa8688823 Oct 2015 08:23Passivhaus schrieb:
If money were no object, a pellet heating system would be my favorite, but from everything you read in the Nearly Zero Energy House (NZEB) context, it is not profitable. According to our current information, the additional cost of a pellet heating system compared to a gas condensing boiler is no longer that high. Currently, there is a 3000€ subsidy from BAFA, and with a buffer tank, even 3500€. In addition, you save on solar thermal/photovoltaic systems, which cost around 4000€. We also save approximately 2500€ for the gas connection. So, in total, the pellet system can cost up to 10,000€ more.
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