Eligible costs for heat pump

The unpleasant aftertaste can be dealt with very easily by having another heat pump offered to you that definitely achieves the annual performance factor? My heating engineer would not sign that off - he made that very clear to me when I wanted to correctly calculate the smaller (and according to the heat load calculation sufficient) heat pump for the annual performance factor.

Yes, that is also my impression. You can’t endlessly cook the numbers. Another heating system isn’t worth the extra cost.

But again: does no one roughly know the proportion of hot water in an air-to-water heat pump? :)

You are right, it says so in the [Merkblatt zum Check].

Yes, that depends a bit on the individual case.

If the specific heating model is already stated in the performance description of the construction contract with the general contractor, it is basically commissioned upon conclusion of the contract and thus actually already too late to apply for BAFA funding.

Hello everyone!

Here I have to ask again for better understanding.
In our case, we originally signed the work contract with a different heating system (< annual performance factor 4.5) and only much later retroactively included the Vaillant with an annual performance factor of 4.5, as the house provider advertised a promotion. In other words, to include the eligible pump for "a small" additional cost, including the Vaillant funding service, etc.
All planning and calculations (including controlled residential ventilation) are basically still pending, so I had assumed so far that I would receive the corresponding documents for the funding applications at a later date.

, do you mean that formally we are already too late for the BAFA application!? That would be bad...
At what point should I otherwise have submitted the application..., after all, without a signed work contract I do not receive any further calculations and documents about it...!?

Hello everyone!

I also have to follow up here for better understanding. In our case, we originally signed the contract for work with a different heating system (< annual performance factor 4.5) and only much later included the Vaillant with an annual performance factor of 4.5, because the house provider promoted a special offer. In other words, for "a small" surcharge, to include the eligible pump, including the Vaillant funding service, etc. All planning and calculations (including controlled residential ventilation) are basically still pending, so until now I assumed I would receive the respective documents for the funding applications at a later time.

, do you think that formally we are already too late for the BAFA application!? That would be bad... At what point should I otherwise have submitted the application..., after all, without a signed contract for work I will not receive any further calculations and documents on this...!?

Well. You just didn’t quote the next sentence where I addressed exactly that case ;)

It’s not so easy at all, and you find a lot of contradictory information. Because each case is somewhat different.

But as I understand it now, with a general contractor it's a special case. Then for the BAFA application, the commissioning of the heating engineer by the general contractor counts.

If you have the Vaillant funding service, I would contact them directly.

At this point, I would like to remind you again of my question: how high is the proportion of hot water in your total heating energy consumption for those who already have a calculation or already live in the house with an air-to-water heat pump?

At this point, I would like to remind you again of my question: what is the share of hot water in the total energy consumption of the heating system with an air-to-water heat pump for those of you who already have a calculation or already live in the house?

For me, 18% was calculated.
4.6 for heating, 3.8 for water heating.
So, mathematically 4.456, and apparently that is sufficient for BAFA for 4.5.