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Watcher786 Nov 2015 10:26Hello everyone,
We are currently facing the question of heating systems. Just recently, on Monday or Tuesday, there was a program where someone ended up paying a fortune for an air-to-water heat pump, which served more as a cautionary example ;(
Personally, I would prefer a geothermal heating system using probes, but this costs us 7,500 € more plus the drilling cannot be guaranteed at a fixed price due to the Kaarst rock formation. So either it works with the first drilling, or if we’re unlucky, we might have to pay even more.
Therefore, we are also considering an air-source heat pump, but unfortunately, you mostly hear negative things about this type of heating system. Are there any users who have this system and are satisfied with it, where the costs are reasonable or at least where they should be? I know it all depends on location, temperatures, etc., but there must be some practical experiences.
I think, first and foremost, one should have a reliable heating contractor who is knowledgeable about the type of heating system. I have a meeting on Tuesday with our heating installer who has already installed many air-source heat pumps.
He had already mentioned the Stiebel Eltron 16 Trend, which is said to be very good and also qualifies for subsidies.
It would be great to hear your opinions and experiences, even if this is yet another thread on the topic.
We are currently facing the question of heating systems. Just recently, on Monday or Tuesday, there was a program where someone ended up paying a fortune for an air-to-water heat pump, which served more as a cautionary example ;(
Personally, I would prefer a geothermal heating system using probes, but this costs us 7,500 € more plus the drilling cannot be guaranteed at a fixed price due to the Kaarst rock formation. So either it works with the first drilling, or if we’re unlucky, we might have to pay even more.
Therefore, we are also considering an air-source heat pump, but unfortunately, you mostly hear negative things about this type of heating system. Are there any users who have this system and are satisfied with it, where the costs are reasonable or at least where they should be? I know it all depends on location, temperatures, etc., but there must be some practical experiences.
I think, first and foremost, one should have a reliable heating contractor who is knowledgeable about the type of heating system. I have a meeting on Tuesday with our heating installer who has already installed many air-source heat pumps.
He had already mentioned the Stiebel Eltron 16 Trend, which is said to be very good and also qualifies for subsidies.
It would be great to hear your opinions and experiences, even if this is yet another thread on the topic.
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nordanney6 Nov 2015 10:34There are no bad heating systems, only poorly planned systems or incorrect sizing.
Just a little anecdote: We live in a new housing development in the Lower Rhine region. There will be four construction phases with around 320 houses in total (half have already been sold and are nearly all built). In the first phase, the energy supplier still offered gas – out of 80 houses, if I remember correctly, only four were connected to the gas network. Almost all the other houses opted for heat pumps (there were a few exceptions with wood pellets or gas tanks in the garden, but you can count them on one hand). Both geothermal and air-to-water heat pumps were used (various manufacturers). Complaints about using these heating systems have been very limited, and consumption is generally reasonable as well.
As you rightly pointed out, it’s important to find a competent heating engineer.
Just a little anecdote: We live in a new housing development in the Lower Rhine region. There will be four construction phases with around 320 houses in total (half have already been sold and are nearly all built). In the first phase, the energy supplier still offered gas – out of 80 houses, if I remember correctly, only four were connected to the gas network. Almost all the other houses opted for heat pumps (there were a few exceptions with wood pellets or gas tanks in the garden, but you can count them on one hand). Both geothermal and air-to-water heat pumps were used (various manufacturers). Complaints about using these heating systems have been very limited, and consumption is generally reasonable as well.
As you rightly pointed out, it’s important to find a competent heating engineer.
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HilfeHilfe6 Nov 2015 12:25There was also an interesting segment about Kampa houses on Plus Minus the day before yesterday.
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Watcher786 Nov 2015 12:37I saw exactly the same system and it made me think twice. On the other hand, I can't imagine that this technology could be that bad. As nordanney mentioned, you probably need to find a skilled heating engineer for the system to work smoothly.
That's why I wanted to ask if there are any satisfied air-source heat pump owners out there. I hope there are?!
That's why I wanted to ask if there are any satisfied air-source heat pump owners out there. I hope there are?!
We are installing a ground-source heat pump and have had more trouble with it than I would have liked so far... now the well driller has no availability this month -.- I am now also considering an air-source heat pump.
According to the calculation, we have an annual heating energy demand of 7,700 kWh. Assuming an additional 30% for domestic hot water, this brings us to about 10,000 kWh of required heating energy.
The assumed seasonal performance factor (SPF) for the ground-source heat pump is 4.7 – let’s take 4.5 as a conservative estimate. The SPF for an air-source heat pump is assumed to be 3. Monthly heating costs are therefore €45 for the ground-source heat pump and €67 for the air-source heat pump.
That’s a difference of €260 per year. The drilling will probably cost us around €10,000.
The break-even point is year 40… without interest. It’s unclear why we still want to go through with the drilling.
So, long story short – if an air-source heat pump is properly sized and does not require an electric backup heater, in my opinion there is no reason not to choose it. The milder your climate and the better your insulation, the better (air-source heat pumps really struggle when it’s -10°C (14°F) outside).
According to the calculation, we have an annual heating energy demand of 7,700 kWh. Assuming an additional 30% for domestic hot water, this brings us to about 10,000 kWh of required heating energy.
The assumed seasonal performance factor (SPF) for the ground-source heat pump is 4.7 – let’s take 4.5 as a conservative estimate. The SPF for an air-source heat pump is assumed to be 3. Monthly heating costs are therefore €45 for the ground-source heat pump and €67 for the air-source heat pump.
That’s a difference of €260 per year. The drilling will probably cost us around €10,000.
The break-even point is year 40… without interest. It’s unclear why we still want to go through with the drilling.
So, long story short – if an air-source heat pump is properly sized and does not require an electric backup heater, in my opinion there is no reason not to choose it. The milder your climate and the better your insulation, the better (air-source heat pumps really struggle when it’s -10°C (14°F) outside).
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