Dear all,
I am currently facing a delivery issue with my heat pump (Vaillant Arotherm Plus VWL 75/6), which is not available from any dealer and according to the manufacturer will likely only be delivered in calendar week 6 of 2022. With winter approaching and my heating technician now using his instantaneous water heater at another customer’s place, the situation is becoming quite problematic. He is offering me a 5 kW (kilowatt) fan heater as a temporary solution, but I’m concerned that this will lead to very high energy costs.
For this reason, I have come up with the idea of getting a readily available monoblock heat pump to use just as a temporary measure until my Vaillant arrives. There seems to be a Panasonic model (probably from the series of the well-known and widely recommended “Geisha”) which appears to be suitable and is available at a reasonable price (around 3500 EUR). I would then resell it afterwards.
However, since the market for used heat pumps is rather small, I wonder whether this will really be cheaper than heating electrically with direct heating for three months. I have roughly calculated that in the worst case, I would have to expect heating costs of 2500-3000 EUR with electric direct heating (depending on extent and weather conditions).
Does anyone here have experience with this?
@Benutzer200, if I remember correctly, you once installed a Panasonic unit? Did you happen to sell it later on?
Well, I hope someone has faced a similar problem and can share their experience.
Kind regards
Tolentino
I am currently facing a delivery issue with my heat pump (Vaillant Arotherm Plus VWL 75/6), which is not available from any dealer and according to the manufacturer will likely only be delivered in calendar week 6 of 2022. With winter approaching and my heating technician now using his instantaneous water heater at another customer’s place, the situation is becoming quite problematic. He is offering me a 5 kW (kilowatt) fan heater as a temporary solution, but I’m concerned that this will lead to very high energy costs.
For this reason, I have come up with the idea of getting a readily available monoblock heat pump to use just as a temporary measure until my Vaillant arrives. There seems to be a Panasonic model (probably from the series of the well-known and widely recommended “Geisha”) which appears to be suitable and is available at a reasonable price (around 3500 EUR). I would then resell it afterwards.
However, since the market for used heat pumps is rather small, I wonder whether this will really be cheaper than heating electrically with direct heating for three months. I have roughly calculated that in the worst case, I would have to expect heating costs of 2500-3000 EUR with electric direct heating (depending on extent and weather conditions).
Does anyone here have experience with this?
@Benutzer200, if I remember correctly, you once installed a Panasonic unit? Did you happen to sell it later on?
Well, I hope someone has faced a similar problem and can share their experience.
Kind regards
Tolentino
H
Hausbau 5528 Dec 2021 15:05Thank you. Yes, I’m glad that the heating engineer and the general contractor were so accommodating with the Hotboy. Heating with underfloor heating is definitely better.
Do you have a way to contact your heating engineer? Mine is on vacation. I’m really interested to know if the Unitower can produce hot water without a heat pump. If everything goes according to plan, my 13.6 kWp (kilowatt peak) photovoltaic system will be commissioned on 01/03. Then, starting in February, I could adjust hot water production somewhat to the photovoltaic yield.
Do you have a way to contact your heating engineer? Mine is on vacation. I’m really interested to know if the Unitower can produce hot water without a heat pump. If everything goes according to plan, my 13.6 kWp (kilowatt peak) photovoltaic system will be commissioned on 01/03. Then, starting in February, I could adjust hot water production somewhat to the photovoltaic yield.
Just my "guess," the tower alone won’t be sufficient for domestic hot water production, even with the heating element.
I also don’t know what kind of power consumption the element will have. So far, our heating element hasn’t even switched on.
In the last few nights, temperatures dropped as low as -10.5°C (13°F). The air-to-water heat pump has been running continuously. The photovoltaic system only helps by feeding in power for a few hours.
There isn’t much sunshine at the moment. It’s been cloudy and overcast almost all day.
I’m keeping my fingers crossed that you’ll soon get a fully functional air-to-water heat pump from Vaillant.
I also don’t know what kind of power consumption the element will have. So far, our heating element hasn’t even switched on.
In the last few nights, temperatures dropped as low as -10.5°C (13°F). The air-to-water heat pump has been running continuously. The photovoltaic system only helps by feeding in power for a few hours.
There isn’t much sunshine at the moment. It’s been cloudy and overcast almost all day.
I’m keeping my fingers crossed that you’ll soon get a fully functional air-to-water heat pump from Vaillant.
H
Hausbau 5528 Dec 2021 16:15Mahri23 schrieb:
Just my "guess," the tower alone won’t be enough for hot water production, despite the heating element.
I don’t even know how much power the element will draw. So far, our heating element hasn’t switched on.
The last few nights we had temperatures down to -10.5°C (13°F). The air-to-water heat pump was running continuously. And the photovoltaic system only contributes supplementally for a few hours.
There hasn’t been much sun lately—mostly cloudy and overcast all day.
I’m keeping my fingers crossed that you’ll soon get a fully functional air-to-water heat pump from Vaillant. Of course, the heating element must be activated. The installation manual for the Unitower provides clear instructions for this.
Your observations regarding photovoltaic yields are nothing new. From February onward, I already have over 600 kWh, and in March over 1100 kWh per month.
What is the basis for your "guess"?
H
Hausbau 5528 Dec 2021 16:46Mahri23 schrieb:
Currently, December only generated 124.4 kWh. February 2021 was 252.4 kWh, and March reached 525.9 kWh. It was only from April that I approached the 1000 mark.
I understand that the heating element must be activated. 😉 Maybe you could tell me the size of your system and your potential annual yield?
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