Hello everyone,
My husband and I attended a home exhibition today featuring a local timber house builder (Schleswig-Holstein) and there we learned about the Vestaxx window heating system.
Is there anyone here who has experience with the Vestaxx window heating?
At first, it sounds unusual to have the heating integrated into the windows. For the triple-glazed windows, a nanotechnology-based, invisible layer is applied to the inner surface of the innermost pane, which warms the glass up to 40 degrees Celsius (104°F) via infrared and heats the room. The warmth actually felt very comfortable, and the windows were completely cold on the outside (today’s temperature was below 10 degrees Celsius (50°F)). Allegedly, the Vestaxx window heating transfers 92% of its heat to the room, and the Technical University of Berlin has tested this Vestaxx window heating system and rated it positively. It appears to have been on the market only recently.
Overall, I find this quite interesting. It is significantly cheaper than other heating systems, allows individual control of each room, and unlike underfloor heating, it is very responsive.
Of course, this only makes sense in a low-energy house (the timber builder mainly constructs 40+ standard homes), as the system runs on electricity. In that case, the Vestaxx window heating is said to consume very little power.
This is my impression from the expo; of course, they want to sell the system.
What are your experiences with Vestaxx? Have you heard of this system before? Could it be an alternative to conventional heating? Does it have a future?
My husband and I attended a home exhibition today featuring a local timber house builder (Schleswig-Holstein) and there we learned about the Vestaxx window heating system.
Is there anyone here who has experience with the Vestaxx window heating?
At first, it sounds unusual to have the heating integrated into the windows. For the triple-glazed windows, a nanotechnology-based, invisible layer is applied to the inner surface of the innermost pane, which warms the glass up to 40 degrees Celsius (104°F) via infrared and heats the room. The warmth actually felt very comfortable, and the windows were completely cold on the outside (today’s temperature was below 10 degrees Celsius (50°F)). Allegedly, the Vestaxx window heating transfers 92% of its heat to the room, and the Technical University of Berlin has tested this Vestaxx window heating system and rated it positively. It appears to have been on the market only recently.
Overall, I find this quite interesting. It is significantly cheaper than other heating systems, allows individual control of each room, and unlike underfloor heating, it is very responsive.
Of course, this only makes sense in a low-energy house (the timber builder mainly constructs 40+ standard homes), as the system runs on electricity. In that case, the Vestaxx window heating is said to consume very little power.
This is my impression from the expo; of course, they want to sell the system.
What are your experiences with Vestaxx? Have you heard of this system before? Could it be an alternative to conventional heating? Does it have a future?
V
Vestaxx GmbH4 Oct 2022 08:40... and I find the comment about the colleague with a locked profile quite pathetic. I don’t need something like that for my arguments and would strictly refuse it.
But it seems there is someone out there who understands and can do the math.
But it seems there is someone out there who understands and can do the math.
R
RotorMotor4 Oct 2022 09:26Vestaxx GmbH schrieb:
Yes, I know from multiple discussions that it can be really hard for some to understand, so here it is again, and gladly in a brief summary as well. What was it again about all those wrong-way drivers on the highway, where you sometimes have to wonder if you might actually be one yourself?
Anyway, I don’t think it’s a constructive way to discuss when you accuse everyone else of not understanding, especially when this thread is full of arguments.
Why is it always the same argument from your side about photovoltaics (although it has already been mentioned several times that you can and should also get them with a heat pump or any other type of heating system)?
Why don’t you compare your heating system with other heating systems like air-to-air heat pumps, night storage heaters, fan heaters, electric underfloor heating, and so on?
In der Ruine4 Oct 2022 10:16I don’t understand why the colleague insists on including the heat pump at all costs.
Maybe I’m just not smart enough. His calculation works just as well without it.
A "cheaper" heat generator with an efficiency below 1 versus an expensive heat generator with an efficiency above 3.
The balance shifts as soon as you consider the electricity price. The cheaper the electricity, the longer it takes for the heat pump to catch up with the advantage of the infrared heating. And a solar system only produces cheap electricity if it was cheap to install in the first place.
Mr. Vestaxx should calculate the tipping point with real numbers.
Maybe I’m just not smart enough. His calculation works just as well without it.
A "cheaper" heat generator with an efficiency below 1 versus an expensive heat generator with an efficiency above 3.
The balance shifts as soon as you consider the electricity price. The cheaper the electricity, the longer it takes for the heat pump to catch up with the advantage of the infrared heating. And a solar system only produces cheap electricity if it was cheap to install in the first place.
Mr. Vestaxx should calculate the tipping point with real numbers.
V
Vestaxx GmbH4 Oct 2022 10:41The first comment I find extremely interesting, and I fully support it.
It fits this topic perfectly. Who are the wrong-way drivers?
And I’m not assuming everyone doesn’t understand this (that would be presumptuous and not my style).
You just have to be open to it and not always keep referring only to the heat pump’s seasonal performance factor and its low consumption.
And now again the remark from you that you could also power a heat pump with photovoltaics.
Of course, that is certainly technically more efficient, but not economical.
Please refer to my previous comments on this.
I wonder why there isn’t a comprehensible counter-calculation here.
There are arguments, yes – but please support them with numbers, data, and facts.
Do a holistic evaluation – but again, nothing comes of that.
What would be the point of comparing one electric direct heating system with another if only the heat pump keeps being brought up? But if you want – here you go:
- I don’t think much of night storage heaters – outdated, no comfort, yet somehow still allowed.
- Electric underfloor heating – also okay, but possibly more losses than with our system.
- Air-to-air heat pump – not bad, but too much air circulation – air is a poorer heat carrier.
- Fan heaters – extremely cheap (as I mentioned before) but also poor comfort due to convection.
- Other infrared heaters – also possible, but they tend to be too hot and therefore belong to a lower comfort class.
I’ll end again with the call: Please make a counter-calculation here publicly available with comprehensible data!!!
Why is there never anything concrete? As an incentive, I’ll offer a seasonal performance factor of 10 for the heat pump.
But please still make it comparable – meaning equal investment costs with an overall consideration of the house’s energy needs!
So – now come forward with your total cost calculations.
It fits this topic perfectly. Who are the wrong-way drivers?
And I’m not assuming everyone doesn’t understand this (that would be presumptuous and not my style).
You just have to be open to it and not always keep referring only to the heat pump’s seasonal performance factor and its low consumption.
And now again the remark from you that you could also power a heat pump with photovoltaics.
Of course, that is certainly technically more efficient, but not economical.
Please refer to my previous comments on this.
I wonder why there isn’t a comprehensible counter-calculation here.
There are arguments, yes – but please support them with numbers, data, and facts.
Do a holistic evaluation – but again, nothing comes of that.
What would be the point of comparing one electric direct heating system with another if only the heat pump keeps being brought up? But if you want – here you go:
- I don’t think much of night storage heaters – outdated, no comfort, yet somehow still allowed.
- Electric underfloor heating – also okay, but possibly more losses than with our system.
- Air-to-air heat pump – not bad, but too much air circulation – air is a poorer heat carrier.
- Fan heaters – extremely cheap (as I mentioned before) but also poor comfort due to convection.
- Other infrared heaters – also possible, but they tend to be too hot and therefore belong to a lower comfort class.
I’ll end again with the call: Please make a counter-calculation here publicly available with comprehensible data!!!
Why is there never anything concrete? As an incentive, I’ll offer a seasonal performance factor of 10 for the heat pump.
But please still make it comparable – meaning equal investment costs with an overall consideration of the house’s energy needs!
So – now come forward with your total cost calculations.
V
Vestaxx GmbH4 Oct 2022 10:54"Being 'in ruins' already says something very true. The electricity price is a key factor in the whole calculation.
How will the electricity price develop? Will it go back down to pre-Ukraine levels? I don’t think so.
The price of photovoltaic systems was quite stable for a long time but is currently actually rising. The price per kWh from a photovoltaic system was therefore fairly predictable. It ranged between 9 - 11 cents/kWh, depending on the system size. And this price doesn’t change once the system is installed. You can even detach from the Renewable Energy Act feed-in tariff and switch to direct marketing. The market price per kWh, for example, was about 31 cents/kWh in July 2022.
That’s why it’s so important to install a photovoltaic system yourself. However, after purchasing a heat pump, in most cases there is no budget left for that. I’m not even talking about rising interest rates and delivery times for heat pumps here."
How will the electricity price develop? Will it go back down to pre-Ukraine levels? I don’t think so.
The price of photovoltaic systems was quite stable for a long time but is currently actually rising. The price per kWh from a photovoltaic system was therefore fairly predictable. It ranged between 9 - 11 cents/kWh, depending on the system size. And this price doesn’t change once the system is installed. You can even detach from the Renewable Energy Act feed-in tariff and switch to direct marketing. The market price per kWh, for example, was about 31 cents/kWh in July 2022.
That’s why it’s so important to install a photovoltaic system yourself. However, after purchasing a heat pump, in most cases there is no budget left for that. I’m not even talking about rising interest rates and delivery times for heat pumps here."
C
Christian 654 Oct 2022 11:07driver55 schrieb:
Colleague of the managing director with a locked profile? 🙂 Do you really think so?
Interesting assumption.
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