ᐅ Air-to-water heat pump, hydronic pellet stove, and photovoltaic system
Created on: 21 Feb 2018 17:14
D
DanielaS
Hello everyone,
We will start the groundworks for our new house next week and have a technical question. My husband would like to have a pellet stove in the living room that is water-heated and can support the air-to-water heat pump. The reason is the comfortable heat and, of course, energy consumption.
We are also planning a photovoltaic system, with or without storage; we have yet to decide on that.
Our air-to-water heat pump is subsidized by BAFA, and the pellet stove might also be eligible for BAFA funding, but we are unsure whether BAFA supports both at the same time for new builds. Do you have any experience with this?
What are your thoughts on this topic? I don’t want to introduce unnecessary technology into the house, but retrofitting is quite difficult.
Key information:
177 sqm (1900 sq ft) solid construction townhouse
4 people (2 children)
Estimated electricity demand with air-to-water heat pump: 7000 kWh per year
Underfloor heating and no ventilation system
Water consumption normal (rather economical), rarely bathing, etc.
If you need any more information, just let me know. Thanks!!
We will start the groundworks for our new house next week and have a technical question. My husband would like to have a pellet stove in the living room that is water-heated and can support the air-to-water heat pump. The reason is the comfortable heat and, of course, energy consumption.
We are also planning a photovoltaic system, with or without storage; we have yet to decide on that.
Our air-to-water heat pump is subsidized by BAFA, and the pellet stove might also be eligible for BAFA funding, but we are unsure whether BAFA supports both at the same time for new builds. Do you have any experience with this?
What are your thoughts on this topic? I don’t want to introduce unnecessary technology into the house, but retrofitting is quite difficult.
Key information:
177 sqm (1900 sq ft) solid construction townhouse
4 people (2 children)
Estimated electricity demand with air-to-water heat pump: 7000 kWh per year
Underfloor heating and no ventilation system
Water consumption normal (rather economical), rarely bathing, etc.
If you need any more information, just let me know. Thanks!!
The BAFA subsidy was not a big issue for us; after a few months, the money was in the account. You just need to adhere to the requirements. If the heat pump does not meet the annual performance factor, that is not a problem. Differences between theoretical and actual performance do not lead to a reclaim of the subsidy.
DanielaS schrieb:
Unfortunately, I cannot see this in the file. However, I found that the seasonal performance factor is 3.3. The total consumption of the air-to-water heat pump is 4,300 kWh. Then there is no BAFA subsidy; your heat pump might be on BAFA’s list, but to qualify for funding, it needs a seasonal performance factor above 4.5. I don’t find 3.3 particularly impressive, especially since that is even the higher theoretical value.
ares83 schrieb:
Then there is no BAFA funding; your heat pump might be on the BAFA list, but to be eligible for funding, it must have an annual performance factor (APF) of over 4.5. I don’t find 3.3 very impressive, especially since that is even the higher theoretical value.Our heat pump is definitely listed among the eligible models with an annual performance factor of 4.5.W
werners8121 Feb 2018 22:42DanielaS schrieb:
Our pump is definitely listed among the supported pumps with an annual performance factor of 4.5.
Which pump is it exactly?
Is it by any chance a Thz or Lwz 504?
As far as I know, the 504 models do not have an annual performance factor of 4.5 in the table, but a COP of 4.95, for example. However, this number is not related to the calculations for the BAFA grant, which was 4.7 for our 504. So it is important to have this checked in advance, as the table is not conclusive.
werners81 schrieb:
Which pump is it?
By any chance a Thz or Lwz 504?
The pump is an Arotherm vwl 85 by Vaillant.