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
R
R.Hotzenplotz15 Feb 2018 14:58Joedreck schrieb:
Was the BAfA subsidy taken into account?No.
But he says that still wouldn’t be enough, since that is only about €4,000.
So you’re saying you would pay an extra €2000?
In that case, I would definitely go for the heat pump.
Assuming a lifespan of 20 years, it would likely come out ahead when considering today’s energy prices. Take a look at a full cost calculation.
For example, there are no base fees for the gas meter, chimney sweep, (chimney if no fireplace is planned), and maintenance is cheaper and less frequent.
However, the heat pump needs to be properly planned and adjusted correctly by you once during the winter.
In that case, I would definitely go for the heat pump.
Assuming a lifespan of 20 years, it would likely come out ahead when considering today’s energy prices. Take a look at a full cost calculation.
For example, there are no base fees for the gas meter, chimney sweep, (chimney if no fireplace is planned), and maintenance is cheaper and less frequent.
However, the heat pump needs to be properly planned and adjusted correctly by you once during the winter.
R
R.Hotzenplotz15 Feb 2018 16:24Joedreck schrieb:
So you would pay an extra 2000€?No, save.
The chimney is already included; this is a fixed house price offer.
I doubt that the maintenance costs are lower. Waterkotte does not have service partners everywhere, and from our Nibe system, I see four-figure amounts spent annually on maintenance technicians. That’s an extreme example, but I don’t believe a mature gas boiler overall requires more maintenance than a heat pump.
But that is exactly the point. We are building with a general contractor, so we have little influence. They don’t even want to provide the heating load calculation (they first sent one that apparently contains errors, and the architect got in trouble for sharing it with the client). How are you supposed to properly check whether the heating system is properly sized? I am very worried that the heat pump will not operate efficiently in the end. And a Waterkotte service partner is not always nearby, whereas there are many options for service partners for a Viessmann gas boiler.
Unfortunately, it is shocking what the contractor you paid is delivering. Unfortunately, they also hold the upper hand and can make your life quite difficult.
I completely understand your concern and cannot offer any convincing argument to reassure you.
Honestly, in your situation, I would choose gas. By the time the boiler breaks down in 20 years, you can still consider whether a heat pump might be a viable option then.
Gas is a proven technology and currently at least equally affordable.
Even though I would personally go for a heat pump, I’m not here to preach.
Saving your nerves is also valuable.
I completely understand your concern and cannot offer any convincing argument to reassure you.
Honestly, in your situation, I would choose gas. By the time the boiler breaks down in 20 years, you can still consider whether a heat pump might be a viable option then.
Gas is a proven technology and currently at least equally affordable.
Even though I would personally go for a heat pump, I’m not here to preach.
Saving your nerves is also valuable.
R
R.Hotzenplotz15 Feb 2018 19:53Apparently, there are also subsidies for gas / solar systems.
Google Bafa
500 € (about $550) for a solar thermal system
It also mentions gas-powered heat pumps. What is that supposed to be? A conventional gas boiler? There is a subsidy of €4,500 (about $5,000) for that.
Google Bafa
500 € (about $550) for a solar thermal system
It also mentions gas-powered heat pumps. What is that supposed to be? A conventional gas boiler? There is a subsidy of €4,500 (about $5,000) for that.
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