The Scoop on Low E Windows for Your Calgary Home

We’ve all heard about windows that are smart when it comes to keeping the inside in, and the outside out, temperature-wise.

Glass is a very important factor for windows and window installation. It is true that a strong frame is required to keep all the components in place while carrying out window installation. But what can really make a difference in the kind of glass you use and the quality of glass coatings applied. If energy conservation is one of your main concerns then glass coatings should be a priority when you make the choice of glass for your windows.

One of the best investments you could make is good quality windows. You can end up paying very high energy bills all through the year if you do not make the extra effort to conserve energy in whatever little way you can. Along with using energy saving appliances you can also use Low E glass.

In order to judge the quality of glass, it’s a good idea to understand the different types of glass ratings and how effective each type will perform. Quality glass is considered to be better if the rating is lower. There are two key numbers in glass ratings. Solar Heat Gain Coefficient (SHGC) and U Values. The term “U Values” gauges the insulating quality of the glass and how well it can keep you warm during winter. The term “SHGC” will show how cool glass will keep you in the summer months; it measures how well the glass can reflect heat away.

The technology that applies a thin layer of metal to the glass enabling it to reflect heat back into the home is known as Low E glass technology. In the times gone by Low E glass was only used for single pane windows but now it is used for all types of glass panes. A very thin layer of tin was applied to molten glass in the case of single pane windows. This was not as effective as the other advanced types of Low E coatings. But soon with the advancement of technology more efficient forms of Low E glass was developed. Micro fine reflective layered surfaces were developed with Silver and this has increased the energy efficiency of glass units to a large extent. Further, each of these layers are gently coated and sandwiched between two glass panes. With this type of glass the use of abrasive cleaners is no longer an issue.

According to JELD-WEN Canada, Low-E (low emissivity) glass helps keep your home warm in the winter and cool in the summer. During warmer months, Low-E repels the UV rays that cause excess heat, keeping your home more comfortable.

Different types of Low-E include:

Low-E 180 (Passive Solar Heat Gain)

Low-E 180 glass keeps your house warm in the winter. Install Low-E 180
glass on east-facing windows if you want heat gain in the morning,
such as in a bedroom or breakfast nook.

Low-E 272 (Reduce Heat Gain)

Low-E 272 glass delivers year-round comfort, reflecting an intermediate level of heat back into the room in winter and rejecting the sun’s heat and UV rays in summer. This product’s coating provides clarity and high-performance low-solar control, reducing window heat gain by 50% compared to ordinary glass.

Low-E 366 (Balanced Solar Control)

Low-E 366 provides a high level of year-round comfort and excellent energy savings. Its coating offers an ideal balance of solar control and high visibility. Blocking up to 95% of the sun’s damaging rays, Low-E glass sets a new standard in energy performance for windows.

Alberta Vinyl Windows & Doors (AVWD) Calgary also boasts quality low-E windows.

Particular styles of glass, including Softcoat, are perfect for hot climates where air conditionng costs are more expensive than heating in winter. This is the best glass for most applications in the Alberta climate. Why is that?

Mostly because it has a high rate of reflection of the radiant heat that emanates outside. This keeps the heat inside and also minimizes heat gain in the summer.

Other types of low-E AVWD glass include:

Argon Gas filled units reduce your window’s conduction and convection of heat. Argon works well with Low-E glass to maximize your new window’s energy efficiency and performance.

7/8″ Overall Insulated Glass results in superior thermal performance.

High Performance Glass — Solar Shield Low-E for reducing solar heat gain. Argon Gas fillings will maximize heat savings.

Optional high performance 1-3/8″ overall triple seal unit — With two ½” air space for Argon Gas with double Low-E allowing for a maximum center of glass at 8.2R (.12U) value.

Triple protection glazing method — An exterior foam glazing tape and an interior silicone full perimeter seal bead provide a great seal.

IGMAC Approved — Certification #’s: SuperSpacer® #0299166 – Intercept™ #0111206

PPG Residential Glass — PPG makes residential window glass for any home and in any climate. They specialize in Solarban 60, which also reflects the sun’s hot rays and keeps your home warmer in winter.

Find out more about how you can save money with quality low-E windows from A two Z Windows & Doors. Call 403-257-DOOR (3667) or email us.









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