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?
E
EinHausfür513 Nov 2021 22:46Durran schrieb:
What happens if the heating installed in the window breaks? Does that mean you have to replace the entire window? Our neighbors had a leak in their underfloor heating shortly after moving in, and the entire ground floor became uninhabitable. They were relocated to a hotel for several weeks while everything was repaired. I’d rather replace a broken window than deal with that. 😉
Without innovation, there is no progress. Why shouldn’t there be new developments in this area? Personally, I find the system quite interesting at first glance and am generally open to it. Whether it makes sense to heat an entire house this way remains to be seen.
Benutzer200 schrieb:
Drawback: For hot water, you need an additional device—ideally a domestic hot water heat pump. Exactly. In this case, the timber house builder combines the heating system with a domestic hot water heat pump, which is added separately.
The company’s strategy is to invest the savings into a large photovoltaic system so that the heating and the heat pump can be powered primarily by self-generated electricity.
I still need to study the topic in more detail. However, it seemed very interesting at first glance, if it really works as advertised. Whether to use it to heat the entire house or only some rooms remains to be decided.
Today we even walked through the office building to find one where the heating was on. At least all the rooms were nicely warm.
EinHausfür5 schrieb:
In our neighbors’ house, shortly after moving in, there was a leak in the underfloor heating system, and the entire ground floor became uninhabitable. Of course, it’s also possible to make mistakes. Otherwise, a leak is usually repaired within a few days (most of that time is drying time, so not actual work time) without having to relocate the residents.
H
hampshire14 Nov 2021 00:06The idea of heating through windows offers a combination of radiant heat sources with architectural and design freedom. It is certainly a great solution for retrofitting in existing buildings with added insulation but without hydronic infrastructure.
Heating costs are probably not optimized to be low, but I estimate the durability to be long-lasting due to the simple, low-movement technology. Operation should be very straightforward and likely maintenance-free.
Being different or new is initially neither “better” nor “worse,” but it is sometimes perceived as a threat and often triggers automatic rejection.
Heating costs are probably not optimized to be low, but I estimate the durability to be long-lasting due to the simple, low-movement technology. Operation should be very straightforward and likely maintenance-free.
Being different or new is initially neither “better” nor “worse,” but it is sometimes perceived as a threat and often triggers automatic rejection.
R
RotorMotor14 Nov 2021 08:13hampshire schrieb:
Heating costs are unlikely to be optimized for low expenses,An electric heating system alone affordable? How so?
What does the energy performance certificate for the KfW say about the heating energy demand?
If I read mine correctly, my 55-standard building requires 11,000 kWh per year. With a COP of 4, that translates to between 3,500 and 4,000 kWh of electricity. This is a direct electric heating system. You really need to calculate carefully for the coming decades. You also have to factor in the risk that the concept may not be accepted in the market and that replacement parts might not be available in 15 years. For underfloor heating, there is always a heat source to connect to.
Solar panels need to be sized quite large. Yesterday, I only produced 1,412 kWh from my 10 kWp east-west system. That doesn't even cover my home's standby electricity consumption without heating.
If I read mine correctly, my 55-standard building requires 11,000 kWh per year. With a COP of 4, that translates to between 3,500 and 4,000 kWh of electricity. This is a direct electric heating system. You really need to calculate carefully for the coming decades. You also have to factor in the risk that the concept may not be accepted in the market and that replacement parts might not be available in 15 years. For underfloor heating, there is always a heat source to connect to.
Solar panels need to be sized quite large. Yesterday, I only produced 1,412 kWh from my 10 kWp east-west system. That doesn't even cover my home's standby electricity consumption without heating.
RotorMotor schrieb:
An inexpensive pure electric heating? How so?Exactly!
This is a pure electric direct heating system!
It has the same heating effect as an electric heater in the room (thermoelectric heat equivalent).
Electric direct heaters have, in principle, almost 100% heating efficiency because 100% of the energy is converted to "waste heat."
Possibly slightly less efficient in the glass, since – as mentioned – about 8% of the heat is lost to the outside.
The downside (in general) is the heating effect of radiant heating decreases with the square of the distance: at twice the distance, the heating effect is only one-quarter.
Unless the radiation hits solid objects that warm up and heat the air through convection.
Such myths about electric energy savings have been spread by interested parties for already 40 years.
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