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
Good question, I had the module connected during the initial installation. It might have been possible to do it myself, but then there’s the issue of the warranty... so I had it done at the same time. I’m always cautious with retrofits while the device is still under warranty.
It was also important to have a network cable there. Since the switch is very close to my setup, installing it and connecting it to the internet was very quick.
It was also important to have a network cable there. Since the switch is very close to my setup, installing it and connecting it to the internet was very quick.
So, I was there but could only check the consumption again. Whether it keeps running continuously, I didn’t verify.
Last month (from Friday noon to Monday night), it was 93 kWh.
And then from Tuesday until today, around 6 p.m., another 40 kWh.
Temperatures in the district over the past few days:
Today, we had no sunshine at all, and despite a desired temperature of 18°C (64°F), I had 22°C (72°F). Could it be that the heating ignores the setpoint and regulates itself solely based on outdoor temperature and return flow temperature?
Last month (from Friday noon to Monday night), it was 93 kWh.
And then from Tuesday until today, around 6 p.m., another 40 kWh.
Temperatures in the district over the past few days:
Today, we had no sunshine at all, and despite a desired temperature of 18°C (64°F), I had 22°C (72°F). Could it be that the heating ignores the setpoint and regulates itself solely based on outdoor temperature and return flow temperature?
Tolentino schrieb:
So today we had no sunshine at all, and despite a desired temperature of 18°C (64°F), I had 22°C (72°F). Could it be that the heating ignores the target temperature and controls itself solely based on outdoor temperature and return flow temperature? Ignoring the indoor temperature and operating purely according to the heating curve is optimal for efficient operation. At the professional trade level, this setting would be called "room control off," if I’m not mistaken. Then the target temperature setting is only responsible for the parallel shift. The base should be 20°C (68°F).
Which heating curve is set? I operate at a target temperature of 21°C (70°F) with a heating curve of 0.2.