Hello everyone,
For our planned new build, we have received two offers regarding a heating system.
The prices are almost identical. I do not want to post the complete technical descriptions yet.
Both are air-to-water heat pumps.
Offer A:
iPump A 2-7 heat pump, split system with inverter-controlled rolling piston compressor
The iPump A 2-7 includes a domestic hot water tank with a 200-liter (53-gallon) capacity
Heating performance at A2°/W35°C: Performance range (min/max): 2.06–7.55 kW
Nominal power / CoP: 3.90 kW / 4.42
Offer B:
Stiebel air-to-water heat pump WPL 17 ACS
Classic Flex Set
Heating capacity at A-7/W35 (EN 14511) 7.8 kW
Heating capacity at A2/W35 (EN 14511) 5.73 kW
Inverter-controlled air-to-water heat pump for outdoor installation
Stiebel buffer tank SBP 100, 100 liters (26 gallons)
Can anyone share any information about these two products? Any experience? The manufacturer iDM is completely unknown to me so far.
What surprises me a bit is the size comparison of the outdoor units. The iPump is almost twice as large as the Stiebel.
I would be very grateful for any feedback.
For our planned new build, we have received two offers regarding a heating system.
The prices are almost identical. I do not want to post the complete technical descriptions yet.
Both are air-to-water heat pumps.
Offer A:
iPump A 2-7 heat pump, split system with inverter-controlled rolling piston compressor
The iPump A 2-7 includes a domestic hot water tank with a 200-liter (53-gallon) capacity
Heating performance at A2°/W35°C: Performance range (min/max): 2.06–7.55 kW
Nominal power / CoP: 3.90 kW / 4.42
Offer B:
Stiebel air-to-water heat pump WPL 17 ACS
Classic Flex Set
Heating capacity at A-7/W35 (EN 14511) 7.8 kW
Heating capacity at A2/W35 (EN 14511) 5.73 kW
Inverter-controlled air-to-water heat pump for outdoor installation
Stiebel buffer tank SBP 100, 100 liters (26 gallons)
Can anyone share any information about these two products? Any experience? The manufacturer iDM is completely unknown to me so far.
What surprises me a bit is the size comparison of the outdoor units. The iPump is almost twice as large as the Stiebel.
I would be very grateful for any feedback.
K
Knuschelpeter2 Nov 2020 09:33Thank you for your feedback.
I will take up the mentioned points and discuss them with the plumbers.
Since I know both companies and have seen many references, I generally feel well cared for by both and trust that the system will be professionally and technically correctly designed and installed.
Can anyone share information about the manufacturers iDM and Stiebel?
From my research, iDM seems to be more like the Audi, and Stiebel like the Golf among heat pumps.
However, there is very little information available online about iDM...
I will take up the mentioned points and discuss them with the plumbers.
Since I know both companies and have seen many references, I generally feel well cared for by both and trust that the system will be professionally and technically correctly designed and installed.
Can anyone share information about the manufacturers iDM and Stiebel?
From my research, iDM seems to be more like the Audi, and Stiebel like the Golf among heat pumps.
However, there is very little information available online about iDM...
T
T_im_Norden2 Nov 2020 09:55Well, the forums are full of people who trusted that the heating installers would do it correctly.
A floor heating system with a supply temperature of 40°C (104°F) is indeed professional and technically correct.
However, it is still not efficient.
A floor heating system with a supply temperature of 40°C (104°F) is indeed professional and technically correct.
However, it is still not efficient.
K
Knuschelpeter2 Nov 2020 10:09Well, without being able to trust other trades, building a house becomes an even more nerve-wracking task than it already is.
I don’t want to start a fundamental debate here. No hard feelings!
I appreciate the points mentioned and will actively discuss them with the heating engineers and hear their opinions.
What’s important to me are practical experiences with iDM or Stiebel, especially since there is very little information available online about the former.
I don’t want to start a fundamental debate here. No hard feelings!
I appreciate the points mentioned and will actively discuss them with the heating engineers and hear their opinions.
What’s important to me are practical experiences with iDM or Stiebel, especially since there is very little information available online about the former.
T
T_im_Norden2 Nov 2020 10:21If you focus on the heat source, in this case the heat pump, right from the start, you are already making a mistake.
The most important part of a heating system is the heat distribution, here the underfloor heating.
Anything done wrong at this stage cannot be corrected later, no matter how good the heat pump is.
The heating contractor is only obligated to provide a heating system that warms the house, nothing more. Therefore, you or a mechanical and electrical engineer (M&E engineer) who designs the underfloor heating according to your specifications must clearly define what you expect from the heating system.
For this reason, you should definitely educate yourself on underfloor heating and its proper design.
The most important part of a heating system is the heat distribution, here the underfloor heating.
Anything done wrong at this stage cannot be corrected later, no matter how good the heat pump is.
The heating contractor is only obligated to provide a heating system that warms the house, nothing more. Therefore, you or a mechanical and electrical engineer (M&E engineer) who designs the underfloor heating according to your specifications must clearly define what you expect from the heating system.
For this reason, you should definitely educate yourself on underfloor heating and its proper design.
N
neubau20192 Nov 2020 13:58tomtom79 schrieb:
In the bathroom, maintain a pipe spacing of 7 cm (3 inches).
For room temperatures, don’t plan with 20 degrees Celsius (68°F), rather with 22 degrees Celsius (72°F).
If you have a large bathtub and a rain shower, then please have a hot water storage tank of more than 200 liters (53 gallons), preferably a fresh water storage tank, but not more than 300 liters (79 gallons).Why is a fresh water storage tank better?
A
Alessandro2 Nov 2020 14:30T_im_Norden schrieb:
Well, the forums are full of people who trusted that the heating installers would do it properly.
Technically and professionally, a floor heating system with a 40°C (104°F) supply temperature is correct.
That doesn’t mean it is efficient, though.What??!
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