What Is The Best Window For Your Home?

You would discover from the early 1900s window that it has many ripples in the single pane of glass set into a wooden frame – which is really different from the most energy-efficient, double-paned, vinyl framed windows of today.
Although window glass has steadily improved through the decades, insulated windows – two or more pieces of glass with dead air between them – made their first appearance in the 1970s. The windows restricted the change in temperature and cut down on condensation by providing dead air space.
A decade later, low-e glass was introduced. Preventing heat and ultra-violet (UV) rays from coming through , low-e coatings are extremely thin layers of metallic oxide that are bonded to the surface of the glass in the window. Due to this, windows have become more effective at keeping heat out during summer and in during winter.

We cannot see infrared or UV rays but they makeup most of the sun’s energy. UV rays can also fade furnishings and finishes inside the home aside from causing those nasty sunburns. Infrared rays heat up the asphalt outside and even your flooring and furniture indoors. If you let it in, infrared heat can affect your home even after the sun sets because this heat is retained and released as the air around them cools.

However, low-e coated glass reflects certain portions of the light spectrum back out through the windows, so the inside of the home stays cooler, not only during the sunny part of the day, but later as well.

The low-e glass comes in hard coat and soft coat. To make hard coat, tin is applied directly to the molten glass. In the soft coat’s case, a thin layer of silver is applied to the glass in a vacuum. Always sandwiched with another piece of glass, soft coat low-e glass is easily damaged. Argon gas is often used between panes to prevent oxidation and also acts as an additional insulator.

A heat mirror, which includes a thin polyester sheet suspended between the two panes of a dual pane window is the third type of low-e glass. If you live in extreme climates, the coating reflects radiant heat and the sheet decreases heat loss, which makes this the best option for you. The film increases insulation by as much as 100 percent while at the same time blocking as much as 99.5 percent of UV light.

Before buying windows, make sure the ones you think you want are appropriate for the climate you live in. The Energy Star or National Fenestration Rating Council (NFRC) label is what you need to find for that. Included in the NFRC label should be the U-value and the solar heat gain coefficient (SHGC) for the window. Windows should have an SHGC rating of .4 or lower, in the hotter areas and a U-factor of .75 or lower; in the colder areas the U-factor should be .35 or less, to comply with Energy Star standards, although there is no SHGC requirement because solar heat gain would not be an issue.

About the author: Flora Boyd provides information about how to conceive fast and how to become pregnant on her site.

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