Hello everyone,
I have always been keen on an air-to-water heat pump combined with a central ventilation system, for example, the Stiebel Eltron LWZ 504.
But what is your opinion if both options were possible (there seems to be hardly any price difference, especially due to subsidies)? Which option would you choose?
A trench collector for a brine-to-water heat pump plus central ventilation, or the above-mentioned air-to-water heat pump plus central ventilation as a combined unit?
I have always been keen on an air-to-water heat pump combined with a central ventilation system, for example, the Stiebel Eltron LWZ 504.
But what is your opinion if both options were possible (there seems to be hardly any price difference, especially due to subsidies)? Which option would you choose?
A trench collector for a brine-to-water heat pump plus central ventilation, or the above-mentioned air-to-water heat pump plus central ventilation as a combined unit?
Always the brine solution. The temperature of the source is simply more stable, resulting in better efficiency and therefore lower operating costs. No noisy outdoor unit and also invisible.
The drilling can be almost cost-neutral thanks to the €5,000 BAFA subsidy, while a trench collector with own labor can even be a gain.
The drilling can be almost cost-neutral thanks to the €5,000 BAFA subsidy, while a trench collector with own labor can even be a gain.
I just told my construction coordinator the same thing, and he said it is much more expensive. Some say one thing, others say another. Why are there such different opinions (cost estimates)? How is self-performance even possible? What does it look like cost-wise without self-performance?
That probably has more to do with willingness. The drilling costs around 6,000 to 8,000 euros. The heat pump itself is actually somewhat cheaper than an air-to-water heat pump because it doesn’t require an outdoor unit.
But what good is that to you if no one offers it at a reasonable price, or if the general contractor isn’t interested in it during construction?
But what good is that to you if no one offers it at a reasonable price, or if the general contractor isn’t interested in it during construction?
Alex85 schrieb:
This probably has more to do with willingness. The drilling costs about 6,000–8,000 Euros. The heat pump itself is actually a bit cheaper than an air-to-water heat pump because it doesn’t require an outdoor unit. But what good is it if no one offers it at a reasonable price or if the general contractor doesn’t want to deal with it during construction.No general contractor. Separate trades contracts. The "construction coordinator" is just the person who arranges the trades for me and occasionally checks that everyone is working properly.
Do we need drilling for a trench collector?
People don’t care about the actual cost to me or what I install. It’s either ignorance or something else. But it’s definitely not a lack of motivation. I just read a report where the ring trench collector was installed as a DIY project. I wouldn’t dare to do something like that. However, it saves a huge amount of money.
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