Hello,
we have purchased a semi-detached house with a Buderus G_124LP gas boiler (manufactured in 1992) installed.
Online, it is often mentioned that heating systems older than 15 years tend to be quite inefficient. Therefore, we are considering replacing the boiler in the near to medium term.
There are certain subsidies available from BAFA for gas hybrid heating systems (30%) and “Renewable Ready” gas condensing boilers (20%).
The house has a south-facing roof, and the previous owners had fully equipped the roof with a photovoltaic system (28 panels).
The photovoltaic system was not sold but has been removed. However, the wiring from the roof to the basement remains, so a new system could be connected quickly.
I would like to ask for your experience regarding the most cost-effective option in this case.
Should we install a new gas boiler combined with a solar thermal system in order to qualify for the BAFA subsidy? The rest of the roof could possibly still be equipped with a photovoltaic system. Or would it be better to install a simple gas boiler with the option to mount 28 photovoltaic panels again later?
The previous owners’ natural gas consumption was about 15,000 kWh (4 people), which is a good reference for us.
I am very much looking forward to your suggestions and recommendations.
Thank you,
Dieter
we have purchased a semi-detached house with a Buderus G_124LP gas boiler (manufactured in 1992) installed.
Online, it is often mentioned that heating systems older than 15 years tend to be quite inefficient. Therefore, we are considering replacing the boiler in the near to medium term.
There are certain subsidies available from BAFA for gas hybrid heating systems (30%) and “Renewable Ready” gas condensing boilers (20%).
The house has a south-facing roof, and the previous owners had fully equipped the roof with a photovoltaic system (28 panels).
The photovoltaic system was not sold but has been removed. However, the wiring from the roof to the basement remains, so a new system could be connected quickly.
I would like to ask for your experience regarding the most cost-effective option in this case.
Should we install a new gas boiler combined with a solar thermal system in order to qualify for the BAFA subsidy? The rest of the roof could possibly still be equipped with a photovoltaic system. Or would it be better to install a simple gas boiler with the option to mount 28 photovoltaic panels again later?
The previous owners’ natural gas consumption was about 15,000 kWh (4 people), which is a good reference for us.
I am very much looking forward to your suggestions and recommendations.
Thank you,
Dieter
We are in a similar situation. In our recently purchased townhouse, there is a gas condensing boiler from 1997, and we would like to replace it before it breaks down. The associated hot water storage tank was replaced by the previous owners in January, so it is brand new. The previous owners’ consumption (2 people) was always between 15,000 and 17,000 kWh in recent years. In our current home, with four people, we have a similar consumption (but without hot water) and pay about 700 EUR in gas per year.
Consumption for four people will probably be somewhat higher, but even at 900 EUR per year, honestly, I don’t see how a hybrid heating system would ever pay off over its entire lifespan. So it will most likely just be a direct replacement with a current model.
Consumption for four people will probably be somewhat higher, but even at 900 EUR per year, honestly, I don’t see how a hybrid heating system would ever pay off over its entire lifespan. So it will most likely just be a direct replacement with a current model.
Vicky Pedia19 Apr 2020 15:03FloHB123 schrieb:
The consumption for four people will likely be somewhat higher, but honestly, even at 900 EUR per year, I can’t see how a hybrid heating system would ever pay off over its entire lifespan. So, it will probably just be a like-for-like replacement with a current model.Calculating the costs is probably the key question. Of course, subsidies are attractive and provide an incentive. In the case of @djdj125, even more so, since a base system is already in place. Basically, photovoltaic systems are interesting because energy won’t get any cheaper. Also, you invest today in a system with the latest technology and have peace of mind for the next 15 to 20 years. I would have both options calculated by a trusted plumber and decide based on the numbers.