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.Hotzenplotz schrieb:
I hardly believe electricity will get any cheaper. On the contrary, once enough energy is switched to renewables, the government won’t be forced to subsidize electric heating anymore.I agree. Especially if electric vehicles receive even more incentives. Where is all that electricity supposed to come from? There are already studies suggesting that electricity will be scarce within 3–5 years. We’ll see how it develops. For me, this is not the best solution.
R
R.Hotzenplotz25 Jan 2018 20:47Lumpi_LE schrieb:
Well, maybe another 50 years until fusion energy, then fossil fuels will be a thing of the past.
That’s enough time for a gas heating system you buy today.
Joedreck schrieb:
You definitely need to keep that energy consultant! Surely you can have him review the planning, right?I can do that. But I’ve already heard that some of his recent statements have at least partially been questioned by the other specialist company. I just hope we’re not just burning money in the end. When two parties are in conflict, you need a judge—but who is the judge here? The general contractor who hired one of the two? Certainly not.
In the general contractor package, the heating system issue is probably a very tricky matter, I think.
Gas, solar, 108 sqm (1160 sq ft), only the standard version of the energy saving regulation. E.On estimates our costs at 750 per year. I’ll see what it turns out to be in September. The price was 5000 less than an air-to-water heat pump. Junkers for both offers. Connection 750, resulting in a 4250 surcharge for the heat pump. Is it really worth it? I don’t think so. A warm room is a warm room. Both do that. Karsten
B
Baumfachmann25 Jan 2018 21:55My house has a ground floor of 90 m² (970 sq ft) and an upper floor of 76 m² (818 sq ft) with an open roof, built to passive house standards and turnkey for €258,000. Two people live here, and annual gas costs are under €400. We shower daily and never feel cold. The gas boiler is a Viessmann Vitodens 200 with standard radiators.
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