ᐅ Heating System Quote Comparison – Request for Your Experiences
Created on: 11 Sep 2019 10:09
T
Tx-25
Hello everyone. We have received three quotes for an air-source heat pump, underfloor heating, photovoltaic system, and decentralized ventilation with heat recovery. As expected, all offers differ from each other.
Regarding the proposed heat pumps:
Brötje BWL Split 8 C with electric heating element €9207.95
Elco Aerotop Split €10,222.50
Viessmann Vitocal 200-S €8829.31
The prices include accessories. From my research, I am most inclined towards the Elco. It seems to have the best specifications on paper. Overall, the offer for this heat pump is also the most affordable. Unfortunately, I found little information about the Brötje system.
Now my questions:
- What do you think about these systems? Do you have any experience? How would you assess the prices?
- What size should the hot water tank be? Considering an air-to-water heat pump combined with photovoltaics? The Brötje system includes a 150-liter (40 gallons) tank plus a 100-liter (26 gallons) buffer tank. The Elco option has a 180-liter (47 gallons) tank.
- What else should be taken into account?
- Are these systems appropriately sized? The building’s energy demand is 21.1 kWh.
Regarding the proposed heat pumps:
Brötje BWL Split 8 C with electric heating element €9207.95
Elco Aerotop Split €10,222.50
Viessmann Vitocal 200-S €8829.31
The prices include accessories. From my research, I am most inclined towards the Elco. It seems to have the best specifications on paper. Overall, the offer for this heat pump is also the most affordable. Unfortunately, I found little information about the Brötje system.
Now my questions:
- What do you think about these systems? Do you have any experience? How would you assess the prices?
- What size should the hot water tank be? Considering an air-to-water heat pump combined with photovoltaics? The Brötje system includes a 150-liter (40 gallons) tank plus a 100-liter (26 gallons) buffer tank. The Elco option has a 180-liter (47 gallons) tank.
- What else should be taken into account?
- Are these systems appropriately sized? The building’s energy demand is 21.1 kWh.
H
hampshire21 Nov 2019 12:48Those who are financially savvy and like to take risks might choose to build today using a fossil fuel system and replace the equipment in 15 years with significant environmental subsidies. It is advisable to prepare the connections in advance...
Those who think not only about their wallet but also about the climate and future generations exclude fossil fuels from their new build from the outset.
Those who think not only about their wallet but also about the climate and future generations exclude fossil fuels from their new build from the outset.
N
neubau201921 Nov 2019 12:55Detlev69 schrieb:
Yes, that’s correct. If you go for very inexpensive heat pump models, it can be cost-effective.
The question is whether these units meet comfort expectations, for example noise levels at the installation site, performance during high heating demand in very cold winters, overall hot water comfort, and of course how long these budget units will actually last.
I’m bothered by those 300-liter (80-gallon) tanks. They require a lot of space, promote bacterial growth, and have standby losses. And the high-quality systems with fresh water stations are significantly more expensive again.
Of course, a lot depends on the design, but in practice, the claim that “it all depends on the design” is often just a smokescreen.
As I said, anyone planning such a system should definitely include realistic, binding offers for maintenance and also consider taxes on self-generated electricity. Two points that are often overlooked.
Seasonal performance factors can also be misleading regarding the extra demand during particularly cold winters. In reality, many then mostly heat with purchased electricity.May I ask what you pay for your gas condensing boiler with underfloor heating and so on?Also, these “cheap heat pumps” are not no-names... These are manufacturers like LG or Panasonic!
I don’t know anyone who has a maintenance contract for their heat pump or even has it serviced annually. Including myself (though I don’t have an outdoor unit). These are hermetically sealed systems. The antifreeze solution had to be topped up shortly after commissioning but has remained stable since then.
Whether it’s worth it or not, you only find out afterwards. There was no gas supply here at all, so the decision was clear.
The heat pump was initially more expensive than gas, especially with the drilling, but there was a €5000 subsidy. I went ahead and got it now; the new gas homeowner will get theirs in 10 years or whenever the phase-out happens.
Whether it’s worth it or not, you only find out afterwards. There was no gas supply here at all, so the decision was clear.
The heat pump was initially more expensive than gas, especially with the drilling, but there was a €5000 subsidy. I went ahead and got it now; the new gas homeowner will get theirs in 10 years or whenever the phase-out happens.
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neubau201921 Nov 2019 12:57hampshire schrieb:
Those who care not only about their budget but also about the climate and future generations exclude fossil fuels from their new build from the start.I agree, you should consider the environment a bit as well! And the price difference isn’t significant regarding purchase, consumption, maintenance, etc.Be careful not to demonize fossil energy.
Car, just one! Nissan Leaf. Annual mileage 20,000 km (12,427 miles). This results in 100 full charges at 45 kWh, which equals 4,500 kWh electricity demand per year. Our annual consumption without a car, for two people, is 1,800 kWh. These are the proportions. With an electric car plus possibly a heat pump heating system, the electricity demand increases by 200% per year. Scale this up to the whole of Europe... where is this electricity supposed to come from if not also from fossil fuels or nuclear power?
Figures from ADAC
Car, just one! Nissan Leaf. Annual mileage 20,000 km (12,427 miles). This results in 100 full charges at 45 kWh, which equals 4,500 kWh electricity demand per year. Our annual consumption without a car, for two people, is 1,800 kWh. These are the proportions. With an electric car plus possibly a heat pump heating system, the electricity demand increases by 200% per year. Scale this up to the whole of Europe... where is this electricity supposed to come from if not also from fossil fuels or nuclear power?
Figures from ADAC
Everything is very well stated.
A small addition:
Even in the warmer half of the year (April to September), solar yield is four times higher than in the colder half (October to March). In other words, only 20% of the annual yield occurs during the colder months, which is precisely when the energy is most needed.
PS: Is the namesake of Lef’s theorem related to this?
A small addition:
Detlev69 schrieb:
A rough rule of thumb: A photovoltaic system produces about 1/8 of its summer (June–August) output during the winter months (November–February).
Even in the warmer half of the year (April to September), solar yield is four times higher than in the colder half (October to March). In other words, only 20% of the annual yield occurs during the colder months, which is precisely when the energy is most needed.
PS: Is the namesake of Lef’s theorem related to this?
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