Hello,
I have a well-insulated KFW40 house from 2014 with underfloor heating and 170m² (1830 ft²) using a Weishaupt gas boiler WTC 15 (heating + hot water).
The gas boiler has two heating circuits. One for the house and the other for the garage. The garage is connected via a district heating pipeline (about 8m (26 ft) from the house). The garage should only be kept frost-free.
My annual gas consumption (heating + hot water) was about 9700 kWh.
I believe my house is well suited for a heat pump. Unfortunately, I wasn’t that knowledgeable back then.
Now my questions.
1. Which type of heat pump would you recommend (ground source or air source)?
2. Where can I install the heat pump? A) Inside the house, where the gas boiler is now, or B) in the garage? Unfortunately, the heat pump could not produce hot water in the garage because there is only a cold water line to the garage. Or are there any solutions? I would prefer the garage otherwise.
I hope you can help.
Thank you.
I have a well-insulated KFW40 house from 2014 with underfloor heating and 170m² (1830 ft²) using a Weishaupt gas boiler WTC 15 (heating + hot water).
The gas boiler has two heating circuits. One for the house and the other for the garage. The garage is connected via a district heating pipeline (about 8m (26 ft) from the house). The garage should only be kept frost-free.
My annual gas consumption (heating + hot water) was about 9700 kWh.
I believe my house is well suited for a heat pump. Unfortunately, I wasn’t that knowledgeable back then.
Now my questions.
1. Which type of heat pump would you recommend (ground source or air source)?
2. Where can I install the heat pump? A) Inside the house, where the gas boiler is now, or B) in the garage? Unfortunately, the heat pump could not produce hot water in the garage because there is only a cold water line to the garage. Or are there any solutions? I would prefer the garage otherwise.
I hope you can help.
Thank you.
X
xMisterDx7 Aug 2022 23:29Hold off on the renovation. You won’t be able to get a heat pump for the winter of 2022/23 anyway, and prices are currently at an all-time high. My installer is asking for an extra €15,000 (around USD 16,000) if he replaces the ordered gas heating system with an air-to-water heat pump... Delivery timeframe is “possibly spring 2023... or late 2023... I can’t tell you.”
Gas prices are indeed very high right now, but they won’t stay at 25 cents per kWh forever. If they did, there wouldn’t be much point in doing anything here anyway, because the industry wouldn’t survive that.
If you don’t believe that, at least wait until the chip shortage eases (mid to late 2023)... Anyone ordering now is paying moon prices.
Gas prices are indeed very high right now, but they won’t stay at 25 cents per kWh forever. If they did, there wouldn’t be much point in doing anything here anyway, because the industry wouldn’t survive that.
If you don’t believe that, at least wait until the chip shortage eases (mid to late 2023)... Anyone ordering now is paying moon prices.
X
xMisterDx7 Aug 2022 23:32Offtopic schrieb:
A quick calculation to consider.
9000 kWh x 0.15 cents per kWh gas equals 1350 euros per year.
The installation of an air-to-water heat pump roughly costs 20,000 euros, based on current information—if any are even available.
It will cost you around 800 to 1000 euros per year in electricity. There are currently no special heat pump tariffs available, except for some older ones.
By the time you have saved 20,000 euros, the heat pump will likely be out of order.
So, for now, it’s better to focus on hydraulic balancing, lowering the supply temperatures, and reducing the hot water temperatures.
Once you have optimized all of this, electricity prices will have surpassed gas prices. This might have been overlooked because gas prices are in the spotlight.
For electricity prices in 2023, a doubling is expected...
And don’t forget:
If you order today, you won’t get photovoltaic systems, heat pumps, or even specialized geothermal drilling within this year.
In that case, it might be better to wait until the situation relaxes again in 2023.
xMisterDx schrieb:
This might have been overlooked because the focus is on gas prices.
For electricity prices, a doubling is expected in 2023...
And something else not to forget:
If you order today, you won’t receive photovoltaics, heat pumps, or specialist drilling for geothermal energy this year.
You might as well wait until things calm down again in 2023. Who says things will calm down?
I only see prices going one way—up—since everyone wants to switch to the better renewables now.
V
Vwgolfcabrio8 Aug 2022 08:18When you rely on contractors, it becomes challenging. Prices are high, but there are alternatives.
Currently, I am installing my second photovoltaic system myself. I have received all the components. Starting in September, I will have 29.9 kWp.
I also want to install the air source heat pump myself. Good monoblock units can be purchased for around 4500€ (about 4500 USD). Additionally, there are costs for the hot water storage tank and installation accessories. Overall, I expect to spend between 7000 and 8000€ (about 7000 to 8000 USD). Unfortunately, this is not eligible for Bafa funding. Or can I at least deduct the purchase price? How many kW should the air-to-water heat pump have? My house has a heat demand of just under 6 kW. Is a 5 kW unit sufficient, or should I go for the 7 kW model?
Currently, I am installing my second photovoltaic system myself. I have received all the components. Starting in September, I will have 29.9 kWp.
I also want to install the air source heat pump myself. Good monoblock units can be purchased for around 4500€ (about 4500 USD). Additionally, there are costs for the hot water storage tank and installation accessories. Overall, I expect to spend between 7000 and 8000€ (about 7000 to 8000 USD). Unfortunately, this is not eligible for Bafa funding. Or can I at least deduct the purchase price? How many kW should the air-to-water heat pump have? My house has a heat demand of just under 6 kW. Is a 5 kW unit sufficient, or should I go for the 7 kW model?
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