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.Hotzenplotz25 Mar 2018 20:14I have serious concerns about the maintenance costs; therefore, I view this critically.
R.Hotzenplotz schrieb:
I have serious concerns about the maintenance costs; therefore, I view it critically.A brine-to-water heat pump does not have higher maintenance costs than other types of heat pumps.R
R.Hotzenplotz25 Mar 2018 21:32Saruss schrieb:
Ground source heat pumps do not have higher maintenance costs than other heat pumps.That may be true. Still, the nearly 400 euros per year according to the Waterkotte website seems quite steep to me.
M
Mastermind125 Mar 2018 21:34Saruss schrieb:
Ground source heat pumps do not have higher maintenance costs than other heat pumps.
A ground source heat pump—unless it is operated with well water—is a reliable, long-lasting, and above all low-maintenance solution. If electricity prices soar, at least you can counteract that directly with a photovoltaic system...
An air source heat pump, on the other hand, has more moving parts, is installed outdoors, and there are some construction considerations to keep in mind (condensate drainage, vibration isolation, electrical supply lines, noise issues?).
With gas and oil heating systems, I increasingly get the impression that people want the cheapest “box” possible, the installer sells the cheapest parts, and that’s when problems start. Quality is no longer given much importance.
Two of my coworkers each have a Viessmann and a no-name brand in their new builds (about 5 years old).
So many components have already been replaced during warranty—and even after that... The heating technician keeps coming back, and so does the manufacturer’s service technician...
I don’t know all the manufacturers for oil/gas systems, but in my family, Weishaupt oil condensing boilers are used consistently—without problems. The oldest oil system (without condensing technology) has been running trouble-free for over 25 years...
But basically, it’s a difficult topic...
You only know if it was the right decision after several years...
R
R.Hotzenplotz25 Mar 2018 22:02This 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 I reject such a product.
I find this unprofessional and therefore I reject such a product.
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