Energy Efficiency



Energy Savings Calculator

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Energy Saving Windows and Doors

Windows and doors are the single biggest source of home energy loss. According to a recent study 70% of the heat you are paying for, and 46% of your air conditioning is going right outside through your windows and doors, that is only if they are really in good condition.

Pictures from a thermal imaging camera shows the  difference in heat loss through the windows (red areas)  from a house before (left) and after (right) new High  Quality Energy Efficient windows were installed.

Your original windows were probably not designed and built with energy savings in mind. They may be wasting energy three ways:
Conduction: In the winter, cold air literally pulls the heat from your home. Heat is absorbed through the window by the cold air outside. Conduction wastes three times as much energy as infiltration.
Radiance: 25% of total heat loss is caused by radiation through window panes. In the summer, the sun radiates into your house. Radiation causes your furnaces and air conditioners to work overtime!
Infiltration: In all seasons, air moves in and out of your home through tiny cracks and crevices around your windows and doors. A 1/16" gap around a window amounts to a hole the size of a brick!

Your old windows and doors cost you money. They are your #1 source of energy loss. Your furnace and air conditioner systems are forced to overwork just to replace the air that escapes.  It`s like trying to fill a bucket with a hole in it!
Don’t let energy and money slip out of old, drafty windows!

What Makes a Window or Door Energy Efficient?

Window Efficiency: Quality Frame Materials; Multiple Panes; Low-E Glass; Gas Fills; Warm Edge Spacers

Stay Warm with Foam-Filled Windows!

Hollow vs. Foam-Filled Vinyl Windows
These two windows are the same except for what is inside the vinyl frames. The frame on the left is hollow, while the frame on the right is filled with insulating foam. Foam-filled window frame:
- Improves overall window performance on the Energy rating by up to 8%
- Reduces heat and cold transfer through the window sash and frame
- Decreases condensation on the glass surface due to reduced conduction on the window sash and frame


Door Efficiency: Multiple Glass Panes; Improved Core Materials; Tighter Fit and Improved Weather Stripping

One of the top reasons people decide to replace their existing windows is to increase the energy efficiency of their home. Energy Star windows and doors not only Save the Environment but can also Save YOU money!

The easiest way to know which window is right for you are by looking for the Energy Star label.
With rising energy costs, energy efficient - Energy Star windows from WELDA actually pay for themselves.