Hello everyone,
I’m new to the forum.
We are building a new single-family house with a basement apartment, totaling 220m2 (2,368 sq ft), KFW 55 standard, located in 71364.
Heating load is 6 kW.
A 10 kW photovoltaic system is planned, so it is important that the “future” pump can communicate well with the photovoltaic system and, of course, achieve an annual performance factor (SPF) greater than 4.5.
Customer service and price-performance ratio should be good.
I have read quite a bit in various forums and entered different scenarios into the annual performance factor calculator.
Now my three favorites:
Rennergy
Bosch
Wolf
Ground drilling, etc., is not possible.
Which one would you recommend?
Do you have favorites?
Any heating system installers you can recommend in the area?
Best regards,
Lucky
I’m new to the forum.
We are building a new single-family house with a basement apartment, totaling 220m2 (2,368 sq ft), KFW 55 standard, located in 71364.
Heating load is 6 kW.
A 10 kW photovoltaic system is planned, so it is important that the “future” pump can communicate well with the photovoltaic system and, of course, achieve an annual performance factor (SPF) greater than 4.5.
Customer service and price-performance ratio should be good.
I have read quite a bit in various forums and entered different scenarios into the annual performance factor calculator.
Now my three favorites:
Rennergy
Bosch
Wolf
Ground drilling, etc., is not possible.
Which one would you recommend?
Do you have favorites?
Any heating system installers you can recommend in the area?
Best regards,
Lucky
C
CrazyChris9 Mar 2020 16:04Lucky40 schrieb:
Hello everyone,
I’m new to the forum.
New build single-family house with a basement apartment, total 220m2 (2,368 sq ft), KfW 55 standard in 71364.
Heating load 6 kW.
Planned photovoltaic system 10 kW, so it is important that the “future” heat pump communicates well with the PV system and, of course, achieves a seasonal performance factor (SPF) > 4.5.
Customer service / price-performance ratio should be reasonable.
I’ve read quite a bit in various forums and entered different scenarios into the SPF calculator.
Here are my three favorites so far:
Rennergy
Bosch
Wolf
Ground drilling and similar are not possible.
Which would you recommend?
Do you have favorites?
Any recommendations for heating installers in the area?
Best regards
Lucky Photovoltaics should either be up to a maximum of 9.9 kWp or at least > 13 kWp.
Air-to-water heat pumps with an SPF > 4.5 are rare. In my opinion, the Alpha Innotec LWDV91-1/3-HDV 9-1/3 is very good. Very efficient. However, customer service is generally not highly prioritized by any of the manufacturers.
Instead of ground drilling, a slinky (horizontal) collector could be considered. See Google for comparisons! This would make you more flexible with the heat pump system again.
T
T_im_Norden9 Mar 2020 17:57Photovoltaics are currently difficult to plan due to the cap.
Hi,
1. At which heat source temperature (HST) should the annual performance factor be achieved?
The Nibe F2120 and the IDM are found in this range. Air-source heat pumps were already mentioned. Ground loop collectors were also discussed. A low flow temperature (FLT) is important for a good annual performance factor. That means with wall heating in the bathroom and activated concrete core in the ceiling, you can reduce the FLT to 30°C (86°F). The concrete core activation increases living comfort and significantly improves cooling with a heat pump.
2. You greatly overestimate the importance of communication between the photovoltaic system and the heat pump. A simple time control (day boost) for the heat pump already significantly increases self-consumption. Active communication then only adds marginal benefits. Therefore, do not use this as the main criterion. Much more important is that the heat pump operates modulating. That makes a much bigger difference. Additionally, all good heat pumps (annual performance factor = 4.5) are smart grid ready and can be directly controlled by the photovoltaic system through their two inputs.
Best regards,
Nika
Lucky40 schrieb:
Planned photovoltaic system 10kW, so it is important that the "future" pump can communicate well with the photovoltaic system and, of course, that the annual performance factor is above 4.5.
1. At which heat source temperature (HST) should the annual performance factor be achieved?
The Nibe F2120 and the IDM are found in this range. Air-source heat pumps were already mentioned. Ground loop collectors were also discussed. A low flow temperature (FLT) is important for a good annual performance factor. That means with wall heating in the bathroom and activated concrete core in the ceiling, you can reduce the FLT to 30°C (86°F). The concrete core activation increases living comfort and significantly improves cooling with a heat pump.
2. You greatly overestimate the importance of communication between the photovoltaic system and the heat pump. A simple time control (day boost) for the heat pump already significantly increases self-consumption. Active communication then only adds marginal benefits. Therefore, do not use this as the main criterion. Much more important is that the heat pump operates modulating. That makes a much bigger difference. Additionally, all good heat pumps (annual performance factor = 4.5) are smart grid ready and can be directly controlled by the photovoltaic system through their two inputs.
Best regards,
Nika
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