Hello,
I have been reading this forum for several months now and have a question regarding the planned heating system.
I have already had several consultation meetings with various home builders and have shortlisted two of them.
The local provider, which I favor, has offered me a choice of three different heat pumps, and now I am having difficulty deciding.
Basic information:
Approximately 128 m² (1377 sq ft) house area, of which about 120 m² (1292 sq ft) is heated by underfloor heating
Urban villa
KfW 70 standard
Central mechanical ventilation system from Pluggit planned
Desired temperature 18-20°C (64-68°F)
No heating load calculation available so far
The heat pump should ideally be able to provide cooling via the underfloor heating system in summer.
The options are:
Designation
Rating
COP
Price before deductions
Incentives
Price after deductions
Rotex HPSU compact
Nominal COP A2 / W35
3.54-3.64
Standard
Standard
Heliotherm Air Source Heat Pump Sensor Komfort Kompakt S08 L-M-CC
Performance COP A2/W35
4.2
Additional cost €5099
Minus BAFA subsidy €1500
€3599
Heliotherm Ground Source Heat Pump SNTM 3-10
Performance COP E4/W35
6.15
Additional cost €9990
Minus BAFA subsidy €4000
€5990
According to the consultant, the Rotex is not eligible for subsidies.
He recommended the Heliotherm air source heat pump because it is significantly quieter, more energy efficient, eligible for subsidies, and only slightly more expensive.
However, according to information online, the subsidy thresholds are as follows:
Air/water heat pumps: 3.10 (at operating point A2/W35)
Brine/water heat pumps: 4.30 (at operating point B0/W35)
Water/water heat pumps: 5.10 (at operating point W10/W35)
Therefore, the Rotex would also qualify for subsidies.
The Heliotherm air source heat pump is €3600 more expensive and only slightly more efficient, at least according to the tabulated values.
The ground source heat pump, of course, has a significantly higher COP.
However, I have not found any subsidy threshold for this heat pump type, as only A, B, and W values are given.
I also couldn’t find these heat pumps on the list of subsidized units by BAFA.
According to the consultant, the ground source heat pump is definitely eligible for subsidies.
About 180-200 m² (1937-2153 sq ft) of ground collectors will be installed for the ground source heat pump.
At the moment, I am leaning towards the ground source heat pump, even though it will mean an additional cost of €6000.
However, I am puzzled that the Heliotherm air source heat pump Sensor Komfort Kompakt S08 L-M-CC offers active cooling, but its technical data does not specify any cooling capacity. On the other hand, the Heliotherm ground source heat pump SNTM 3-10 lists a cooling capacity E4/W55, but the website does not state that it is suitable for cooling.
Which solution would you recommend?
Best regards,
Florian
I have been reading this forum for several months now and have a question regarding the planned heating system.
I have already had several consultation meetings with various home builders and have shortlisted two of them.
The local provider, which I favor, has offered me a choice of three different heat pumps, and now I am having difficulty deciding.
Basic information:
Approximately 128 m² (1377 sq ft) house area, of which about 120 m² (1292 sq ft) is heated by underfloor heating
Urban villa
KfW 70 standard
Central mechanical ventilation system from Pluggit planned
Desired temperature 18-20°C (64-68°F)
No heating load calculation available so far
The heat pump should ideally be able to provide cooling via the underfloor heating system in summer.
The options are:
Designation
Rating
COP
Price before deductions
Incentives
Price after deductions
Rotex HPSU compact
Nominal COP A2 / W35
3.54-3.64
Standard
Standard
Heliotherm Air Source Heat Pump Sensor Komfort Kompakt S08 L-M-CC
Performance COP A2/W35
4.2
Additional cost €5099
Minus BAFA subsidy €1500
€3599
Heliotherm Ground Source Heat Pump SNTM 3-10
Performance COP E4/W35
6.15
Additional cost €9990
Minus BAFA subsidy €4000
€5990
According to the consultant, the Rotex is not eligible for subsidies.
He recommended the Heliotherm air source heat pump because it is significantly quieter, more energy efficient, eligible for subsidies, and only slightly more expensive.
However, according to information online, the subsidy thresholds are as follows:
Air/water heat pumps: 3.10 (at operating point A2/W35)
Brine/water heat pumps: 4.30 (at operating point B0/W35)
Water/water heat pumps: 5.10 (at operating point W10/W35)
Therefore, the Rotex would also qualify for subsidies.
The Heliotherm air source heat pump is €3600 more expensive and only slightly more efficient, at least according to the tabulated values.
The ground source heat pump, of course, has a significantly higher COP.
However, I have not found any subsidy threshold for this heat pump type, as only A, B, and W values are given.
I also couldn’t find these heat pumps on the list of subsidized units by BAFA.
According to the consultant, the ground source heat pump is definitely eligible for subsidies.
About 180-200 m² (1937-2153 sq ft) of ground collectors will be installed for the ground source heat pump.
At the moment, I am leaning towards the ground source heat pump, even though it will mean an additional cost of €6000.
However, I am puzzled that the Heliotherm air source heat pump Sensor Komfort Kompakt S08 L-M-CC offers active cooling, but its technical data does not specify any cooling capacity. On the other hand, the Heliotherm ground source heat pump SNTM 3-10 lists a cooling capacity E4/W55, but the website does not state that it is suitable for cooling.
Which solution would you recommend?
Best regards,
Florian
Stumpy schrieb:
According to online sources, the subsidy thresholds are as follows:
Air-to-water heat pumps: 3.10 (at operating point A2/W35)
Brine-to-water heat pumps: 4.30 (at operating point B0/W35)
Water-to-water heat pumps: 5.10 (at operating point W10/W35) According to the BAFA website, a heat pump must have a minimum seasonal performance factor (SPF) of 4.5. However, you can hardly verify or calculate this value anywhere, because for us, online calculators only showed 4.2, whereas the manufacturer’s calculations resulted in an SPF above the subsidy threshold, which BAFA accepted.