Is it worth buying new windows?

 Today, the opportunity to reduce energy consumption is a common reason for people to start thinking about their windows. Can it possibly pay to replace them and buy new windows?

The heat seals through the window can be as large as a third of the house's total heating. If you compare this with the fact that windows in recent years have become up to 70% more energy-efficient than old double-glazed windows, you see that there can be large energy gains.

The streamlining is due to new technologies. Today, almost all window manufacturers offer energy-efficient triple glazed windows and energy-saving glass. On energy-efficient windows, two or three glasses have been sealed with air or noble gas between the panes. The gas conducts heat worse than air and therefore provides better insulation.

Additional energy can be saved with energy-saving glass that has a metal coating on one side of the window that reflects heat. This means that less heat penetrates through the window. You can have one or two energy-saving glasses in the window cassette.

Since the glass also reflects light, the window lets in slightly less sunlight into the room. However, this can be an advantage in the summer when you get lower costs for cooling a room with a large window section.

U-value on old connected double-glazed windows

A classic older connected double-glazed window has a U-value of about 2.5. But when it comes to the u-value of old connected double-glazed windows, several aspects must be taken into account. 1. The larger the wooden surface in the window frame, the more wood the better the value. 2. How big is the gap between the window frame and the frame, it also affects the u-value. If you only look at the glass itself, a value of about 3.0 is reasonable.

U-value on new windows

However, if you have old but still functioning windows, it is more difficult to calculate a window replacement, even if the energy costs are lower. However, since the windows affect the total energy consumption, it may be worth looking at a window replacement in connection with replacing, for example, a boiler or other heating equipment. With new windows, maybe you can buy a smaller facility and earn some of the money there.

But you can get other benefits that are at least as important. An advantage is a quieter indoor environment with better insulation. Less cold drafts and drafts allow you to use your home differently, and perhaps place the elements in other places. Better functions and easier window cleaning, and perhaps also less maintenance in the future can be great advantages.

If you have a lot of windows, you should also consider whether it will be very hot in the summer. Then you can also get costs and energy consumption for cooling or ventilating during the summer. Such costs can be lower if you choose windows with energy-saving glass that reflect solar radiation.