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
B
Bauexperte13 Jul 2012 09:03Hello,
I’m a bit lost; how can you determine the region just from the consumption values?
So, you guessed correctly; we work exclusively within a radius around our location that we can reliably support.
Thank you, same to you; we finally have a weekend off.
Best regards
Cascada schrieb:
Based on the consumption values, your clients all seem to be from the Rhineland, right?
I’m a bit lost; how can you determine the region just from the consumption values?
So, you guessed correctly; we work exclusively within a radius around our location that we can reliably support.
Cascada schrieb:
Greetings and have a good start to the weekend
Thank you, same to you; we finally have a weekend off.
Best regards
Bauexperte schrieb:
Hello,
I’m a bit stuck; how can the region be determined based on the consumption values?
So, you guessed correctly; we only work within a radius around our location, which we can reliably manage.
Thanks and back to you; we finally have a free weekend.
Kind regardsHello,
My question referred to the consumption values for a family of four, about 600 to 800€/year for an air source heat pump.
However, we come from northern Upper Franconia.
In our new housing development, there are several air source heat pumps. Of those we have contact with, none manage to stay within 800€…
As for our own house, I can’t say much yet—we only moved in January. The annual performance factor so far is 4.9 (2012 according to the display, ground source heat pump).
Best regards...
Cascada schrieb:
...I can’t say much about our own system yet—we only moved in January. The annual performance factor so far is 4.9 (2012 according to the display, brine heat pump). That is not an annual performance factor but rather a somewhat undefined COP. Wait for the period from January to March 2013, and then evaluate a full year from January to December. Additionally, internal heat meters do not always provide accurate results.Best regards
€uro schrieb:
This is not an annual performance factor, more like a rather undefined COP. Wait for 01...03/2013 and then evaluate a complete year from 01...12. Also, internal heat meters do not always provide accurate results.
Best regards.Hello,
you are, of course, right. But when the year is over, I can say how much money I spent to heat the house – after all, that is what really matters. Then I can also see how much energy (electricity) I had to use and how much heat was generated (according to the display). How else could I measure the thermal output? Should I install an external heat meter? And what about the domestic hot water?
Regards...
Cascada schrieb:
You are, of course, right. But once the year is over, I can say how many € I spent to keep the house warm – Correct. Cascada schrieb:
...that is ultimately what matters. Not entirely, because the financing costs for the system also need to be taken into account. What’s the benefit of low consumption costs if they come at the expense of excessive financing costs?
Best regards.
€uro schrieb:
Correct.
Not entirely, because the capital service for the system also needs to be considered.
What good are low operating costs if they come with excessive capital service costs?
Best regards.Hello.
You are of course right. But in my opinion: I saved the costs for the gas connection and the chimney – in return, the heat pump was more expensive than the gas boiler. It should have balanced out that way. The actual additional cost is then the heat source. The drilling and connection did not cost €9,000. I need to "earn back" that amount to reach the break-even point – plus interest, of course.
After one year, I can see how much energy I used and convert that required energy into gas equivalent. Then I will have a comparison.
Am I looking at this wrong?
Regards...
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