ᐅ New single-family home with propane gas – is it possible without photovoltaic or solar panels?
Created on: 16 Jul 2020 19:07
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pagoni2020
Hello everyone,
for our building project, a 150 sqm (1,615 sq ft) single-family home for two people in Saxony, I am researching heating options in advance. Geothermal energy, heat pumps, and so on are somewhat familiar to me by now, but I am now wondering about heating with liquefied petroleum gas (LPG).
At the fully developed building plot, everything is connected except for a gas supply line. A few new buildings nearby have obviously chosen LPG, which is still relatively common in new construction here in the eastern part of our country (unlike in my former home region of Baden-Württemberg).
We will probably have lower heating demand since it will mostly be just the two of us at home; during the day, only one or sometimes nobody will be there.
From what I have read and hopefully understood correctly, photovoltaic systems alone usually make little sense; I had solar panels on my old house, which was nice, but whether it paid off over 10 years... I have no idea.
The general contractor will probably offer an air-to-water heat pump as standard, which I will definitely look into, as well as geothermal energy.
Still, I am also considering LPG because I have a large plot (to bury the tank) and the technology is reliable and well-proven.
With all the things like KfW funding, etc., I can’t seem to find any information about whether and what I must use in addition when choosing LPG.
So my question is:
Do I have to install an additional energy source if I use LPG?
Are there any sensible alternatives or ideas for using LPG?
for our building project, a 150 sqm (1,615 sq ft) single-family home for two people in Saxony, I am researching heating options in advance. Geothermal energy, heat pumps, and so on are somewhat familiar to me by now, but I am now wondering about heating with liquefied petroleum gas (LPG).
At the fully developed building plot, everything is connected except for a gas supply line. A few new buildings nearby have obviously chosen LPG, which is still relatively common in new construction here in the eastern part of our country (unlike in my former home region of Baden-Württemberg).
We will probably have lower heating demand since it will mostly be just the two of us at home; during the day, only one or sometimes nobody will be there.
From what I have read and hopefully understood correctly, photovoltaic systems alone usually make little sense; I had solar panels on my old house, which was nice, but whether it paid off over 10 years... I have no idea.
The general contractor will probably offer an air-to-water heat pump as standard, which I will definitely look into, as well as geothermal energy.
Still, I am also considering LPG because I have a large plot (to bury the tank) and the technology is reliable and well-proven.
With all the things like KfW funding, etc., I can’t seem to find any information about whether and what I must use in addition when choosing LPG.
So my question is:
Do I have to install an additional energy source if I use LPG?
Are there any sensible alternatives or ideas for using LPG?
We built without any subsidies. After totaling the costs, we would have ended up with a profit of 0–3 thousand euros (€) [0–3T€]. Everyone knows there are subsidies available, and they come at a corresponding cost. This way, we were able to decide what and how to insulate. We did not want a mechanical ventilation with heat recovery system, but it would have been mandatory. From March to October, our doors and windows are open. The calculated savings of a mechanical ventilation with heat recovery system are based on 24 hours a day, 365 days a year, with windows closed.
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pagoni202017 Jul 2020 13:29Nida35a schrieb:
We built without subsidies, and after totaling the costs, we would have been roughly €0-3,000 (about $0-3,200) ahead. Everyone knows there are grants available, and it costs accordingly. This way, we could decide how to insulate, and we didn’t want a controlled mechanical ventilation system, although it would have been mandatory. From March to October, our doors and windows are open. The calculated savings from a controlled mechanical ventilation system assume it runs 24/7, 365 days a year, with windows closed. We will soon take a closer look at the subsidy topic and might come to a similar conclusion. We’ll see where it makes sense for us, and controlled mechanical ventilation will likely be similar in our case. I’m just gathering all possible information so I can evaluate it as best as possible. In the end, we don’t have to follow every trend that comes along, unless it makes sense to us or fits our lifestyle.
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T_im_Norden17 Jul 2020 13:36Subsidies for heat pumps are and have been independent of insulation and mechanical ventilation systems.
T_im_Norden schrieb:
3100 for KfW 40 seems high to me.
What is your annual performance factor? I just checked the heat pump’s info menu.
Annual performance factor for water is 2.8
Annual performance factor for heating is 4.0.
To me, it’s like fuel consumption for a car—figures can be pretty optimistic.
Our expectation was 500-800 € per year for heat pump electricity costs, so it fits.
There are two of us living normally, I’m in shorts and a T-shirt, the better half adjusts the heating for warm feet. The bedroom windows are tilted open all night. Energy-saving experts could probably manage with half of that, and with expensive measures (solar panels & co) we could probably reduce it further, but does it pay off?
It’s noticeably warmer upstairs for us, which is a downside since the bedrooms are upstairs.
Regards, Nida
T
T_im_Norden25 Jul 2020 16:04There could still be potential with a seasonal performance factor of 4. But if it works for you, then everything is fine.
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