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:
The question is whether the tubes are so much more expensive that the lower price of inefficient flat-lying flat plate collectors is "worth it," or whether, despite the higher price, a more reasonable cost-benefit ratio results from using the tube collectors. Unfortunately, I only received the two pictures.It definitely won’t be worth it. It’s a solar thermal system with 5-8sqm (54-86 sq ft). Nothing really pays off at that size. (I have one myself.) Still, the system produces a lot of hot water in summer. Also, the efficiency difference between flat-lying and tilted collectors is, I dare say, only marginal. I pass through the city daily and see the same 5sqm (54 sq ft) systems installed on newly built “urban villas.” In other words, they are usually installed that way.
R
R.Hotzenplotz24 Mar 2018 14:16Here, an elevated mounting system would not be recommended either if we only had a 15° roof pitch. I also don’t see a flat roof collector without elevation in the picture.
Welcome to the new residential areas in Berlin, that’s all I’ll say about that (referring to the picture). This is even one of the "better" ones.
@R.Hotzenplotz
A roof with only a 15° pitch is not shown in the picture, but you can see that the systems are scattered around, mostly facing west.
What I’m getting at:
If you now have your system installed with a 15° tilt facing south, you will have at least the same performance as most of those in the picture with their west-facing systems and 30–45° tilt, etc. — all of which are approved and built without any problems.
@R.Hotzenplotz
A roof with only a 15° pitch is not shown in the picture, but you can see that the systems are scattered around, mostly facing west.
What I’m getting at:
If you now have your system installed with a 15° tilt facing south, you will have at least the same performance as most of those in the picture with their west-facing systems and 30–45° tilt, etc. — all of which are approved and built without any problems.
ypg schrieb:
The development plan decides on two stories, and every builder happily constructs some standard villa... I really can’t call any of them attractive.There wasn’t really a development plan there. Practically anything that fit the mold was allowed to be built.
Alex85 schrieb:
Who voluntarily builds 1.5 stories if two are allowed?I did. The two-story houses like in the picture are just dreadful. I’d rather go with roof slopes.
Lumpi_LE schrieb:
Each house only has a 3m (10 feet) strip of land around it. I find that creepy.Yes, something like that. Back then we also considered building there (or buying the lemon-yellow one in the middle at the top). It was a huge area, and in 2006, everything still started out rather moderate. In the end, there are now about 500 houses. The interesting part is that each year the lots got smaller, but the houses built on them grew larger.
This is how it looked at the start in 2006, as I said, still rather moderate:
R
R.Hotzenplotz25 Mar 2018 11:33What should one actually think of a heating system like the Viessmann Vitocaldens 222-F?
It is a combination of an air-to-water heat pump and a gas condensing boiler. You can program the current electricity and gas prices, and the system selects the most economical mode of operation by itself. Sounds great. I wasn’t familiar with it until now. And you can do without the expensive solar collectors.
It is a combination of an air-to-water heat pump and a gas condensing boiler. You can program the current electricity and gas prices, and the system selects the most economical mode of operation by itself. Sounds great. I wasn’t familiar with it until now. And you can do without the expensive solar collectors.
Similar topics