Blog > Category Posts > Energy Efficiency

What is an Energy Star Energy Rating?

The higher the ER rating number, the more energy-efficient the window or door.
Although windows and doors do not consume energy, they can be a significant source of energy loss. If you are buying windows with energy efficiency in mind, then the ER will help you make standardized window product comparisons.

Having trouble reading window ratings?

Energy Rating Example
Reading window and glass ratings are easily confusing, sometimes the high number is better and sometimes the lower number is better. Here are a few tips to help you out.

What are Energy Star climate zones

ENERGY STAR qualified products in Canada can be classified into 3 climate zones. To qualify for a zone, a product must meet a minimum set of specifications. But to maximize energy cost-saving efficiency, there are other factors to consider.

Balancing energy costs and comfort - 3 Scenerios

Window Optimization - Maximizing comfort and energy efficiency
Windows provide light, warmth and ventilation, but they also decrease home energy-efficiency and can affect the comfort in your home. Choosing the right glass option will allow you to find a balance between energy costs and the desired level of home comfort.

What is a window U-factor

The lower the U-value, the better the window is at keeping the heat in during the winter and the better it insulates
In Ottawa, our windows lose heat to the outside during the colder months and gain heat from the outside during the warmer months. U-factors allow consumers to compare the insulating properties of different window products in order to optimize home comfort.

Understanding the R-value

The R-value which has actually been around for some time now has become an increasingly popular measurement for the use in window sales. How come?

What is a Solar Heat Gain Coefficient?

the higher the SHGC, the number, the greater the solar gain
Let the sun shine in, or not. The Solar Heat Gain Coefficient (SHGC) measurement can help you achieve a desired increase or decrease in the amount of solar radiation (heat) passing through a window into your home.

Understanding visual transmittance in windows

Understanding Visible Light Transmittance
The amount of light you let into your home is a matter of personal taste. When replacing your windows, understanding the VT will help you get it right.