ᐅ District heating versus air-to-water heat pump for KfW 40 Plus standard
Created on: 18 Oct 2016 14:51
S
skybiker2000
Hello everyone,
we are currently planning our single-family house (about 160 m² (1720 sq ft)). It will be built using a timber frame construction method with a basement. The prefab house supplier offers a standard KfW 55 house. The rooms will be heated with underfloor heating.
In the building area, connection to the local district heating network is mandatory unless you build a KfW 40 plus house.
I have compared the possible costs.
District heating:
District heating connection including transfer station €8,948.80 (offer)
Additional costs for an extra heating circuit for underfloor heating €952.00 (offer)
Hot water storage tank €1,000.00 (estimate)
Connection costs for “heating” €3,000.00 (estimate)
Base price per year: approx. €350
Price per kWh: 10 cents gross
Total €13,900.80
Upgrading to KfW 40 plus:
Additional wall insulation €5,590.00 (offer)
Photovoltaic system €5,590.00 (offer)
Battery storage €7,990.00 (offer)
Air-to-water heat pump €3,000.00 → offset against current planning (estimate)
Additional basement insulation: €2,000.00 (estimate)
Total €24,170.00
Minus KfW 40 plus subsidy €10,000
Adjusted total €14,170
I have to admit the consultation with the energy advisor is still pending. They will probably be able to say exactly which measures are necessary to reach the KfW 40 plus standard.
Would you continue pursuing this option, or is KfW 40 plus with a basement unattainable? Starting with the existing district heating and then switching later in about 10 years probably doesn’t make sense either?
Thank you very much for your feedback!
Best regards,
Björn
we are currently planning our single-family house (about 160 m² (1720 sq ft)). It will be built using a timber frame construction method with a basement. The prefab house supplier offers a standard KfW 55 house. The rooms will be heated with underfloor heating.
In the building area, connection to the local district heating network is mandatory unless you build a KfW 40 plus house.
I have compared the possible costs.
District heating:
District heating connection including transfer station €8,948.80 (offer)
Additional costs for an extra heating circuit for underfloor heating €952.00 (offer)
Hot water storage tank €1,000.00 (estimate)
Connection costs for “heating” €3,000.00 (estimate)
Base price per year: approx. €350
Price per kWh: 10 cents gross
Total €13,900.80
Upgrading to KfW 40 plus:
Additional wall insulation €5,590.00 (offer)
Photovoltaic system €5,590.00 (offer)
Battery storage €7,990.00 (offer)
Air-to-water heat pump €3,000.00 → offset against current planning (estimate)
Additional basement insulation: €2,000.00 (estimate)
Total €24,170.00
Minus KfW 40 plus subsidy €10,000
Adjusted total €14,170
I have to admit the consultation with the energy advisor is still pending. They will probably be able to say exactly which measures are necessary to reach the KfW 40 plus standard.
Would you continue pursuing this option, or is KfW 40 plus with a basement unattainable? Starting with the existing district heating and then switching later in about 10 years probably doesn’t make sense either?
Thank you very much for your feedback!
Best regards,
Björn
markus270320 Oct 2016 09:20I can only agree with that. You already have an expensive provider and are dependent on them. Our kWh price with a gas tank is currently around 5.54 cents/kWh. No base fee. So you are already paying double for the kWh.
If I were you, I would definitely try to move away from that.
If I were you, I would definitely try to move away from that.
S
skybiker200020 Oct 2016 11:13That means, if I estimate generously, we (2 adults + 2 small children) consume 10,000 kWh per year. Is this assumption realistic?
This means for the district heating:
Basic charge (for the first 15 kW) = €401.57
Base energy price 10.12 cents/kWh at 10,000 kWh consumption = €1,024.10
Total: €1,425.71 per year → €118.81 per month
That seems like a considerable price.
The costs per year for a KfW 40 plus house would probably be significantly lower. This would affect both electricity consumption and heating costs.
Is a saving of €500 per year realistic? For a qualified answer, I will probably have to go through this with an energy consultant.
Thank you for your feedback!
This means for the district heating:
Basic charge (for the first 15 kW) = €401.57
Base energy price 10.12 cents/kWh at 10,000 kWh consumption = €1,024.10
Total: €1,425.71 per year → €118.81 per month
That seems like a considerable price.
The costs per year for a KfW 40 plus house would probably be significantly lower. This would affect both electricity consumption and heating costs.
Is a saving of €500 per year realistic? For a qualified answer, I will probably have to go through this with an energy consultant.
Thank you for your feedback!
We have a local heating network connection.
Costs: €4,000 one-time development and connection fee
Base price: €140 per kW of connection capacity (we have 4.56 kW)
Energy price per kWh about 6.5 - 7 cents (linked to the price of light heating oil)
Consumption (130 m² city villa) since the end of April 2014, including screed drying, 20,000 kWh and 1 meter (3.3 feet) of wood in the wood-burning stove.
The base price includes annual maintenance and the heat exchanger itself. So if it breaks, it will be replaced. Therefore, we don’t need to set aside reserves for this. It’s also beneficial that we are allowed to operate an additional stove.
Costs: €4,000 one-time development and connection fee
Base price: €140 per kW of connection capacity (we have 4.56 kW)
Energy price per kWh about 6.5 - 7 cents (linked to the price of light heating oil)
Consumption (130 m² city villa) since the end of April 2014, including screed drying, 20,000 kWh and 1 meter (3.3 feet) of wood in the wood-burning stove.
The base price includes annual maintenance and the heat exchanger itself. So if it breaks, it will be replaced. Therefore, we don’t need to set aside reserves for this. It’s also beneficial that we are allowed to operate an additional stove.
S
skybiker200020 Oct 2016 16:22I just noticed that I wrote earlier that no additional heat sources are allowed. That’s not entirely correct, as tile stoves are permitted.
This might allow for some cost optimization...
But thanks for sharing your numbers!
This might allow for some cost optimization...
But thanks for sharing your numbers!
I find the energy consumption somehow high. I used about 2400 kWh for screed heating (directly with electricity, i.e., heating rods of the heat pump in February/March, so it was not particularly warm outside) for approximately 160 square meters plus basement. Annually (though with a ground source heat pump) so far about 1600 kWh of electricity for heating and hot water.
from on the go
from on the go
S
skybiker200024 Oct 2016 14:52A question for district heating users.
Are the connection or installation costs subsidized by BAFA or KfW?
Does anyone here happen to know the relevant funding program?
Thank you very much for your answers!
Are the connection or installation costs subsidized by BAFA or KfW?
Does anyone here happen to know the relevant funding program?
Thank you very much for your answers!
Similar topics