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 find that untrustworthy and therefore I reject such a product.It's a good thing that the responsible citizen doesn't need to sign anything at all.
R.Hotzenplotz schrieb:
This is the maintenance contract. It is required if you want to keep the warranty, which makes sense for a new device.
I find this unprofessional and therefore reject such a product.Well, the statutory warranty/guarantee applies regardless. Otherwise, the maintenance contract for an air-to-water heat pump at Waterkotte costs exactly the same, right?R
R.Hotzenplotz25 Mar 2018 22:11Saruss schrieb:
Does the maintenance contract for an air-to-water heat pump from Waterkotte cost exactly the same, then?You’re not allowed to post links here, but if you visit Waterkotte’s website, you’ll find the information quickly. It seems everything costs about the same, which isn’t surprising, since I think an air-to-water heat pump contains even more technology and wearable parts. A brine (ground source) heat pump is comparatively simple in construction.
Alex85 schrieb:
Good thing that the responsible customer doesn’t have to sign anything.Of course, you can skip it. But if something goes wrong with the system later, these costs give you an idea of what a typical tradesperson’s visit costs. That’s what I always say: with these kinds of products, you end up paying a lot in maintenance and repairs. My landlord can tell you stories about that.
Of course, things can work out differently by chance, but there are enough cases where it goes exactly like this.
R.Hotzenplotz schrieb:
You’re not allowed to post links here, but if you visit the Waterkotte website, you’ll quickly find what you’re looking for. The cost is probably about the same, which isn’t surprising since I think an air-to-water heat pump involves even more technology and wear parts. A ground-source heat pump is comparatively simple in design.
Of course, you can skip that. But if anything ever goes wrong with the system, these costs give you an idea of what typical service work costs. That’s what I always say. With these kinds of products, you pay a lot for maintenance and repairs. My landlord can tell you plenty about that.
Of course, things can turn out differently with some luck, but there are enough cases where it plays out exactly like that.That’s exactly where I read it, so maintenance isn’t really an argument for or against. I can also imagine that similar terms exist for other devices if you want a longer warranty than the legal minimum. No manufacturer gives anything away for free. Otherwise, my ground-source heat pump has been running for almost exactly 4 years now without any repairs, replacement parts, or defects. I haven’t gathered long-term experience yet, but I’ve never heard of any long-term problems, and the technology has been around for quite a while and has been widely used (longer than many might think, I believe).R
R.Hotzenplotz25 Mar 2018 22:24Alex85 schrieb:
This thread is already 41 pages long and in the end, it will come down to a gas boiler. Let's leave it at that. We’ll see. If it ends up being significantly more expensive than it already is, then maybe not. However, it might also end up being a hybrid system.
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