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 553 Mar 2022 21:35Tolentino schrieb:
Friday noon to Monday night) 93 kWh.
And then from Tuesday until today, around 6 p.m.: another 40 kWh The consumption is relatively easy to calculate and compare with the heat pump data. If I neglect solar and internal gains as well as ventilation losses, the calculation with my values is as follows: Building envelope area 360 m² (3875 sq ft) × transmission heat loss coefficient 0.2 W/m²K = 72 W/K × temperature difference between outside and inside, for example 20°C (36°F) ≈ 1500 W × 24 hours, resulting in about 36 kWh thermal loss. That should correspond to approximately 8 to 10 kWh of electricity per day.
Tolentino schrieb:
Can this be installed by yourself, or does it have to be done by the HSL technician?You can actually do it yourself, and it should not affect the warranty.
In my case, the Vaillant technician who was on-site and faced with my question said it’s basically "just two wires" that need to be connected to the bus.
If I’m not mistaken, the module is also Wi-Fi capable.
This week I had very low electricity consumption for heating (probably due to the sun), but the hot water preparation might still need some optimization....!?
So, after the heat pump used another 20 kWh since yesterday, I had a bit of time this morning to check around the professional installation level. Yes, the room control was already off, and the heating curve was set to 0.4!!! I have now temporarily changed it to 0.2.
The heat pump seems to be leaking further; at least the area underneath it in the back is wet. Unfortunately, I can’t catch the moment when it happens, otherwise I would know where it’s leaking from. Is it possible to trigger a defrost cycle?
The heat pump seems to be leaking further; at least the area underneath it in the back is wet. Unfortunately, I can’t catch the moment when it happens, otherwise I would know where it’s leaking from. Is it possible to trigger a defrost cycle?
Check the test menu on the hydro station/professional level to see if it is available there. The code should be 17.
Is the hot water system working? On my hydro station, the valve was set to manual by default and was only changed to automatic after I pointed it out. 20 kWh of electricity per day is quite high. But are you looking at the actual electricity consumption or the heat produced?
Is the hot water system working? On my hydro station, the valve was set to manual by default and was only changed to automatic after I pointed it out. 20 kWh of electricity per day is quite high. But are you looking at the actual electricity consumption or the heat produced?
OWLer schrieb:
Ignoring the indoor temperature and relying solely on the heating curve is optimal for efficient operation I would like to disagree with this. Heating controlled based on the indoor temperature is more efficient, or at least the indoor temperature should be included when determining the required flow temperature. This significantly improves efficiency, especially during transitional seasons, because in new buildings the heating can simply remain off when it is cold outside but still warm inside, and solar gains may occur during the day.
Following this approach, my heating system has been switched off precisely since March 1st, and surprisingly, even without heating cycles, the house remains comfortably warm despite -2°C (28°F) at night and around 10°C (50°F) during the day with corresponding solar gain.
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