Energy 04

Energy 04

We've been talking about how the exterior wall is what protects you from the cold.  It is the exterior wall that keeps the heat inside and the cold outside.  Obviously the exact opposite is true in the summer.

Earlier we talked about increasing the size of the wall cavity allowing for more insulation.  The same theory applies to windows.  Typically windows have evolved into several major configurations:

  • Single glaze windows - the single layer of glass in a window is something that is simply not used any more.  This type of window offers little protection to heat loss and in new buildings it does not meet the Vermont Energy Code.
  • Double pane windows - this is the window that gained in popularity in the early 1970's just after The Energy Crisis of 1973.  Ordinary double pane windows were around for a while and then were replaced with LOW-E windows
  • The LOW-E window is a double pane window that have a thin metallic coating on the inside that greatly improves the insulating performance.  LOW-E coatings are a product that came from the Space Age.
  • LOW-E windows then improved further when the void in between the glass was filled with Argon Gas.  Argon is a good product in that it is inexpensive and conducts heat very poorly.  Or, an Argon Gas filled window has a significantly better insulating capabilities.  When LOW-E coating and Argon Gas were combined our modern window was created.  And, it is this LOW-E Argon Gas filled window that is today's common practice window.

Here at Vermont Modular you might have noticed that we do not build your ordinary home.  We go out of our way to built The Most Energy Efficient Home in Vermont.  Therefore we do not use LOW-E Argon gas filled windows, we use the most technologically advanced window available.

  • Every home from Vermont Modular comes with Triple Pane windows or three pieces of glass not two.  By adding the third piece of glass two significant improvements are made:
    • First - it creates two spaces or voids where gas can be added
    • Second - it allows for a second coating of LOW-E film.  The LOW-E film is always on the inside of the glass so a Triple Pane window has two layers of LOW-E coating where as a Double Pane window has only one.

Insulating Values of Windows:

The Insulation in a structural wall is measured in R-Values and the higher the number the greater the resistance to transmitting heat; high score wins.

The Insulating value of a window is measured in U-Values, a U-Value measures Thermal Performance and the higher the number the worse the performance.  So in windows we are looking for the lowest number possible.  The Vermont Energy Code requires that all windows have a U-Value of U-0.30 or better.  The typical double pane window used in Vermont is a U-0.29 or barely better than required.  

A triple pane window from Vermont Modular will have a U-Value of U-0.19 which is a huge improvement in the performance of your windows.

Between our double wall construction with its R-Value of R-40± and the Triple Pane Windows with a U-Value of U-0.19 you will be greatly protected with the howling winds, blowing snow, and bitter cold.  Oh by the way, all the same applies to protecting you from the excessive heat of summer.

You know you'd rather have your new home from Vermont Modular!

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