Hello everyone,
Has anyone tried to get funding from BAFA for an air-source heat pump? The seasonal performance factor is set so extremely high that it seems practically unattainable.
Regards
Has anyone tried to get funding from BAFA for an air-source heat pump? The seasonal performance factor is set so extremely high that it seems practically unattainable.
Regards
Hello everyone,
I have an air-source heat pump with BAFA funding...
1. The BAFA list essentially includes all heat pumps that generally meet the eligibility criteria for funding (SG-Ready).
2. The funding requires achieving a seasonal performance factor (SPF) of at least 4.5. Until March, this could still be calculated using the old version of the VDI guideline. From March onwards, it must be calculated according to the new VDI guideline. The new calculation method is closer to real-world conditions, which generally results in lower SPFs. During the transition period, it could happen that the online calculator from BWP showed an SPF below 4.5 with the new method, while manufacturers could provide calculations using the old method with an SPF above 4.5. In the future, only the new VDI guideline must be used for BAFA funding.
3. In new builds, with proper planning, good air-source heat pumps can achieve calculated SPFs above 4.5 even at a nominal outdoor temperature (NOT) of -14°C (7°F). Examples include brands like Nibe, IDM, or Novelan. Essentially, it is important to design the heating surfaces to achieve a flow temperature (FT) of around 30°C (86°F). In normal rooms, underfloor heating is usually sufficient for this. In bathrooms, wall heating should be considered.
4. Concrete core activation (CCA) is particularly well-suited for lowering the flow temperature and achieving a good seasonal performance factor. This not only increases the efficiency of the heat pump but also provides excellent cooling via the heat pump. This is an important comfort aspect in summer. Compared to the costs (mainly just a few pipes), the benefits of CCA are extremely high.
5. When considering an air-source heat pump, it is definitely worth thinking about whether a geothermal heat pump with a slinky trench collector (also called ring trench collector) might be a better alternative. This type of collector is feasible on many small plots of land. Taking into account the higher BAFA funding for geothermal heat pumps, a ring trench collector combined with a geothermal heat pump can even be more cost-effective for new builds than an air-source heat pump. I would have chosen a ring trench collector myself, but unfortunately, geothermal systems were prohibited by the local development plan. That’s why it became an air-source heat pump paired with photovoltaic panels.
Best regards,
gnika77
P.S. Is it allowed to post links here now? There is a lot of detailed and helpful information on these topics available online.
P.P.S. Under no circumstances install a heating buffer tank with a heat pump.
I have an air-source heat pump with BAFA funding...
1. The BAFA list essentially includes all heat pumps that generally meet the eligibility criteria for funding (SG-Ready).
2. The funding requires achieving a seasonal performance factor (SPF) of at least 4.5. Until March, this could still be calculated using the old version of the VDI guideline. From March onwards, it must be calculated according to the new VDI guideline. The new calculation method is closer to real-world conditions, which generally results in lower SPFs. During the transition period, it could happen that the online calculator from BWP showed an SPF below 4.5 with the new method, while manufacturers could provide calculations using the old method with an SPF above 4.5. In the future, only the new VDI guideline must be used for BAFA funding.
3. In new builds, with proper planning, good air-source heat pumps can achieve calculated SPFs above 4.5 even at a nominal outdoor temperature (NOT) of -14°C (7°F). Examples include brands like Nibe, IDM, or Novelan. Essentially, it is important to design the heating surfaces to achieve a flow temperature (FT) of around 30°C (86°F). In normal rooms, underfloor heating is usually sufficient for this. In bathrooms, wall heating should be considered.
4. Concrete core activation (CCA) is particularly well-suited for lowering the flow temperature and achieving a good seasonal performance factor. This not only increases the efficiency of the heat pump but also provides excellent cooling via the heat pump. This is an important comfort aspect in summer. Compared to the costs (mainly just a few pipes), the benefits of CCA are extremely high.
5. When considering an air-source heat pump, it is definitely worth thinking about whether a geothermal heat pump with a slinky trench collector (also called ring trench collector) might be a better alternative. This type of collector is feasible on many small plots of land. Taking into account the higher BAFA funding for geothermal heat pumps, a ring trench collector combined with a geothermal heat pump can even be more cost-effective for new builds than an air-source heat pump. I would have chosen a ring trench collector myself, but unfortunately, geothermal systems were prohibited by the local development plan. That’s why it became an air-source heat pump paired with photovoltaic panels.
Best regards,
gnika77
P.S. Is it allowed to post links here now? There is a lot of detailed and helpful information on these topics available online.
P.P.S. Under no circumstances install a heating buffer tank with a heat pump.
Bookstar schrieb:
The likelihood of receiving subsidies with an air-to-water heat pump is slightly higher, though The likelihood is exactly 100% if you inform yourself properly and know what you need to do.
Best regards, Nika
Duran schrieb:
Quick question – how exactly does the proof of the annual performance factor work? Which annual performance factor (APF)? Solid construction or timber frame? Has the equipment already been chosen? New build or existing building? If new build, are the heating surfaces already installed?
Regards, Nika
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