Hi!
I’ve already spent some time on the “Pink Forum” (as it’s affectionately called). However, there you quickly encounter knowledgeable salespeople and/or people who tend to discourage you about building a house in general. This forum feels more welcoming, and you’re more likely to exchange experiences with people who have gone through the same situation as we are now—or who are currently in that situation too—the agony of choice. No intention to criticize the other forum overall…
We are currently in the situation where the developer plans to install an air-to-water heat pump in our house. Oh yes, about our house:
Semi-detached, KFW70 standard, 145m² (1560 sq ft) plus basement, currently 2 occupants, future maximum 4 occupants, heating needed: around 6 kW (detailed heating load calculation not yet available)
The developer’s credit amounts to 7,000 EUR plus a possible BAFA subsidy of 4,500 EUR, making a total of 11,500 EUR. An offer for drilling is already available at 6,300 EUR including VAT.
We are now trying to decide on the “right” ground source heat pump. Not an easy task, because opinions on various configurations (product, buffer tank, energy recovery unit, etc.) differ greatly—and everyone claims this is the right way.
Currently, these are our options:
- Tecalor TTF07 – 300l (79 gallons) domestic hot water tank, 200l (53 gallons) buffer tank
- Wolf BWS-1-06-I – 300l (79 gallons) domestic hot water tank, 500l (132 gallons) buffer tank
- Weishaupt (exact model to be confirmed tomorrow) – 300l (79 gallons) domestic hot water tank, no buffer tank (-> underfloor heating)
- Junkers SUPRAECO STM 60-1 Compact or STE 60-1 + water storage tank
Unfortunately, we don’t have much time left to decide; the developer is already putting some pressure on us. I expect a decision to be made by the end of next week.
Best regards & thanks for your effort!
Gatho
I’ve already spent some time on the “Pink Forum” (as it’s affectionately called). However, there you quickly encounter knowledgeable salespeople and/or people who tend to discourage you about building a house in general. This forum feels more welcoming, and you’re more likely to exchange experiences with people who have gone through the same situation as we are now—or who are currently in that situation too—the agony of choice. No intention to criticize the other forum overall…
We are currently in the situation where the developer plans to install an air-to-water heat pump in our house. Oh yes, about our house:
Semi-detached, KFW70 standard, 145m² (1560 sq ft) plus basement, currently 2 occupants, future maximum 4 occupants, heating needed: around 6 kW (detailed heating load calculation not yet available)
The developer’s credit amounts to 7,000 EUR plus a possible BAFA subsidy of 4,500 EUR, making a total of 11,500 EUR. An offer for drilling is already available at 6,300 EUR including VAT.
We are now trying to decide on the “right” ground source heat pump. Not an easy task, because opinions on various configurations (product, buffer tank, energy recovery unit, etc.) differ greatly—and everyone claims this is the right way.
Currently, these are our options:
- Tecalor TTF07 – 300l (79 gallons) domestic hot water tank, 200l (53 gallons) buffer tank
- Wolf BWS-1-06-I – 300l (79 gallons) domestic hot water tank, 500l (132 gallons) buffer tank
- Weishaupt (exact model to be confirmed tomorrow) – 300l (79 gallons) domestic hot water tank, no buffer tank (-> underfloor heating)
- Junkers SUPRAECO STM 60-1 Compact or STE 60-1 + water storage tank
Unfortunately, we don’t have much time left to decide; the developer is already putting some pressure on us. I expect a decision to be made by the end of next week.
Best regards & thanks for your effort!
Gatho
Yes, for me, underfloor heating as a buffer storage is also the most appealing and practical option.
We are completely free to choose the heating installer.
If we decide on gas condensing technology, the contract states that the developer is obliged to install it in the house, so no additional costs would arise for us there. Then it would only be the costs mentioned earlier for the heating system plus the chimney. The price also included a 45-liter (12-gallon) water storage tank (referred to as a stratified storage tank). I want to move away from the air-to-water heat pump, among other reasons, because the outdoor unit bothers us a lot. The developer wants to place it at the entrance area, and the cold air constantly blows past your legs. To me, this is a complete design flaw. I am also somewhat skeptical about the noise level. I am also critical of the fact that in the monobloc system, the entire technology is housed in the outdoor unit.
Therefore, I am considering a ground-source heat pump or gas condensing technology.
By the way, I calculated the heating load using an online calculator (heating load estimation based on the Energy Saving Ordinance calculation):
Transmission load: 3534 W
+ Ventilation load: 1637 W
+ Domestic hot water load: 400 W
= Total heating load: 5572 W
Good luck
Gatho
We are completely free to choose the heating installer.
If we decide on gas condensing technology, the contract states that the developer is obliged to install it in the house, so no additional costs would arise for us there. Then it would only be the costs mentioned earlier for the heating system plus the chimney. The price also included a 45-liter (12-gallon) water storage tank (referred to as a stratified storage tank). I want to move away from the air-to-water heat pump, among other reasons, because the outdoor unit bothers us a lot. The developer wants to place it at the entrance area, and the cold air constantly blows past your legs. To me, this is a complete design flaw. I am also somewhat skeptical about the noise level. I am also critical of the fact that in the monobloc system, the entire technology is housed in the outdoor unit.
Therefore, I am considering a ground-source heat pump or gas condensing technology.
By the way, I calculated the heating load using an online calculator (heating load estimation based on the Energy Saving Ordinance calculation):
Transmission load: 3534 W
+ Ventilation load: 1637 W
+ Domestic hot water load: 400 W
= Total heating load: 5572 W
Good luck
Gatho
Hmm, we haven’t really considered an air-to-water heat pump as an indoor unit yet... we quickly focused on a ground-source heat pump. We are now also receiving a last-minute quote for a Waterkotte EcoTouch Geo and another offer for the drilling; I’m curious to see how it goes. The Waterkotte actually sounds quite good.
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