ᐅ Window Selection: Double or Triple Glazing?!?

Hello everyone,
a new topic has come up again. Yesterday, the window installer was on-site for the measurements.
The question arose whether to choose double or triple glazing. The window installer tends to prefer double glazing, saying it lets in more light and the rooms are brighter compared to triple glazing. Honestly, I hadn’t really thought about that before.
By the way, this concerns a prefabricated house from the late 1970s with a brick facade. According to feedback from the energy consultant, triple glazing would not be a problem as long as you ventilate properly.
From what I have read online, we might also be eligible for a subsidy from KfW for triple-glazed windows. So now I am wondering whether to go with double or triple glazing. What are your opinions on this? Thanks

Technically speaking, the lighting aspect is correct. However, the size and placement of the windows are likely more important. You can safely dismiss that argument.

You need to directly compare the offered glass types based on their Light Transmission (LT) values. It’s not accurate to say that triple glazing automatically means less light.

Here is a small example:

Ah, okay, that's good to know. Thanks for the information. I will inquire about it.

X_SH5_X schrieb:

According to feedback from the energy consultant, triple glazing is not an issue if you ventilate properly

This has nothing to do with the glazing itself, but rather with the airtight installation of the new windows.

Personally, I would choose only triple glazing. Not because it is necessarily better, but because it increases the value of the house more than double glazing does. Even if both options cost the same.

I used to work in the window industry. When two or three panes have the same price, they are generally also comparable in quality. The number of panes is more of a factor for "practical minds" – and in this respect, it can also influence the image when reselling. However, without changing the wall construction, I would be careful not to push the U-value requirements beyond what the energy-saving regulations demand.

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