Hello,
We are starting to get really frustrated... every builder tells us something different...
We want to build a 130sqm (1,399 sq ft) KfW 70 house with the living room facing south, and we are unsure whether to choose gas or an air source heat pump. Some providers, at almost the same price level, offer us air source heat pumps and claim that the annual costs are significantly (30%) lower compared to gas, while others doubt this.
We understand that insulation with gas/solar systems is usually better because an air source heat pump boosts efficiency more towards KfW 70 standards compared to gas/solar, which might argue in favor of gas. An air source heat pump might fail somewhat sooner, and in case of problems, you can usually get quick and competent local support with gas. With air source heat pumps, there could be more difficulties. Additionally, the noise of air source heat pumps (in our case about 3 meters (10 feet) from the neighbor) is not insignificant. Some say that sooner or later, everyone ends up having issues with neighbors for this reason.
We are interested in air source heat pumps with storage tanks from these providers: Vaillant, Mitsubishi Zubadan, and Rotex.
What we are really curious about is the annual cost for heating and hot water with both systems.
We live near Kassel.
What should we choose, and what would be cost-effective TODAY? What is your opinion on Vaillant?
Regards
Gigi
We are starting to get really frustrated... every builder tells us something different...
We want to build a 130sqm (1,399 sq ft) KfW 70 house with the living room facing south, and we are unsure whether to choose gas or an air source heat pump. Some providers, at almost the same price level, offer us air source heat pumps and claim that the annual costs are significantly (30%) lower compared to gas, while others doubt this.
We understand that insulation with gas/solar systems is usually better because an air source heat pump boosts efficiency more towards KfW 70 standards compared to gas/solar, which might argue in favor of gas. An air source heat pump might fail somewhat sooner, and in case of problems, you can usually get quick and competent local support with gas. With air source heat pumps, there could be more difficulties. Additionally, the noise of air source heat pumps (in our case about 3 meters (10 feet) from the neighbor) is not insignificant. Some say that sooner or later, everyone ends up having issues with neighbors for this reason.
We are interested in air source heat pumps with storage tanks from these providers: Vaillant, Mitsubishi Zubadan, and Rotex.
What we are really curious about is the annual cost for heating and hot water with both systems.
We live near Kassel.
What should we choose, and what would be cost-effective TODAY? What is your opinion on Vaillant?
Regards
Gigi
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R.Hotzenplotz25 Jan 2018 13:09Edison schrieb:
When I see ground-source water pumps or air-to-water heat pumps with an operating cost of €80-120 per month, and that for new builds?I spoke with an energy consultant. With heat pumps, the heating system must be perfectly designed. If anything goes wrong during planning or installation, you can quickly end up with serious problems using such a system. He said that in more than 50% of cases, significant mistakes occur. I share this deep concern.
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Bieber081525 Jan 2018 14:22Gas is currently relatively inexpensive, while electricity is costly. This should not be forgotten. A few years ago, gas was significantly more expensive.
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R.Hotzenplotz25 Jan 2018 14:32I hardly believe that electricity will get any cheaper. On the contrary, once enough has been switched to renewable energy sources, the government will no longer be obliged to subsidize heating electricity.
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R.Hotzenplotz25 Jan 2018 14:41Lumpi_LE schrieb:
Nobody knows what will happen with gas prices either; given the dependence on Russia, they could easily double very quickly.If it ends up like in Denmark, where gas heating systems are no longer allowed in new buildings, demand will drop significantly while supply remains constant for decades. However, a Russia-related risk cannot be completely ruled out.
R.Hotzenplotz schrieb:
I spoke with an energy consultant. When it comes to heat pumps, the heating system must be perfectly designed. If anything goes wrong during planning or installation, you can quickly find yourself in trouble with such a system. He said that in over 50% of cases, these serious mistakes occur. I am deeply concerned about this.You definitely need to keep this energy consultant! Surely you can have him review the planning?Similar topics