Hello Forum,
We are planning to install many large windows in our new build (approx. 300sqm (3,230 sq ft) ground floor + upper floor).
The southwest side will consist of 80-90% glass (window front on the ground floor + large windows on the upper floor). We also have many windows on the north side (but no full window front).
Friends are advising us to reduce the size of many windows because they claim it will lead to heat loss (in winter) and high heating costs.
I’m not very knowledgeable on this yet – I’m currently researching topics like the heat transfer coefficient, etc. But with a well-insulated new build, triple glazing, a heat pump, and a photovoltaic system, I thought heating costs would stay reasonable and not get out of control.
I would appreciate your opinions and experiences. What do you think? What is your advice?
(It has actually been important to us to have many large windows for light, views, etc.).
Thank you for your help and advice.
Best regards
We are planning to install many large windows in our new build (approx. 300sqm (3,230 sq ft) ground floor + upper floor).
The southwest side will consist of 80-90% glass (window front on the ground floor + large windows on the upper floor). We also have many windows on the north side (but no full window front).
Friends are advising us to reduce the size of many windows because they claim it will lead to heat loss (in winter) and high heating costs.
I’m not very knowledgeable on this yet – I’m currently researching topics like the heat transfer coefficient, etc. But with a well-insulated new build, triple glazing, a heat pump, and a photovoltaic system, I thought heating costs would stay reasonable and not get out of control.
I would appreciate your opinions and experiences. What do you think? What is your advice?
(It has actually been important to us to have many large windows for light, views, etc.).
Thank you for your help and advice.
Best regards
W
wiltshire27 Jan 2025 23:42ypg schrieb:
The window cleaner will be more expensive and will need to put in more effort.Who wants to clean a dog’s nose print off? This one looks like a love letter from the Middle East.wiltshire schrieb:
Who would want to remove nose prints left by a dog? This one looks like a love letter from the Middle East.
[ATTACH alt="Nasenpost - 1.jpeg"]90178[/ATTACH]Funny, ours doesn’t do anything like that. He just stamps his paws on the floor when he wants to go outside.
SuoTam99 schrieb:
We are planning to install many large windows in our new build (approximately 300 sqm (3,229 sq ft) for ground and upper floors). [...] Friends are now advising us to reduce the size of many windows [...] I’m not very familiar with this yet – I am currently studying topics like the thermal transmittance coefficient, etc. [...] (Large windows have actually been important to us for light, views, and so on). Then why not share the house design and the view? Where does the 300 sqm (3,229 sq ft) come from (250 sqm (2,691 sq ft) plus some added allowance for amateur planning?), is it based on family size or just a desire for spaciousness as an end in itself?
For a house of this size, I would set aside the advice from friends and diving deep into the details for now and first look for an architect for phase A who can create a preliminary draft together with me.
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Hello @SuoTam99,
You already have another thread running in parallel regarding the balcony. Would you consider engaging with the community there as well? Just like here, participants are willingly sharing private photos and details, but there is still no response or updated information about your plans from you.
Multiple separate threads about one project, especially without active involvement from the original poster, tend to be slow and produce weak results. Please contribute your part as well.
You already have another thread running in parallel regarding the balcony. Would you consider engaging with the community there as well? Just like here, participants are willingly sharing private photos and details, but there is still no response or updated information about your plans from you.
Multiple separate threads about one project, especially without active involvement from the original poster, tend to be slow and produce weak results. Please contribute your part as well.
S
Schorsch_baut28 Jan 2025 08:40I would keep an eye on the room acoustics and ensure sufficient UV filters are used.
M
MachsSelbst28 Jan 2025 21:02I probably don’t have super high-end passive house windows, but my wall has a U-value of 0.234, and the windows reach 1.02. That’s a factor of 4 difference.
This means my 186m² (2002 sq ft) 36.5cm (14 inches) PP2 exterior walls lose as much heat as the 40m² (430 sq ft) window area within them.
So yes, windows are much, much less effective in thermal insulation compared to walls.
Also, keep in mind with your large window front... can anyone see inside your home? Does the sun blast straight into your living room?
In the end, you might end up spending 90% of the year with the shutters or curtains closed because it’s uncomfortably cold or hot near the windows, or because you feel like you’re on display and all the neighbors and passersby can look right into your living room...
This means my 186m² (2002 sq ft) 36.5cm (14 inches) PP2 exterior walls lose as much heat as the 40m² (430 sq ft) window area within them.
So yes, windows are much, much less effective in thermal insulation compared to walls.
Also, keep in mind with your large window front... can anyone see inside your home? Does the sun blast straight into your living room?
In the end, you might end up spending 90% of the year with the shutters or curtains closed because it’s uncomfortably cold or hot near the windows, or because you feel like you’re on display and all the neighbors and passersby can look right into your living room...
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