A New Coating for Cold Canadian Weather

Manufacturers need flexible choices when designing windows to beat the Canada ENERGY STAR 2020 code. So Cardinal CG now offers a new option for the Canadian market in residential window and doors. This glass is called LoĒ-Di89 and is a new application of our LoĒ-i89 coating. LoĒ-Di89 glass gives manufacturers that extra nudge over LoĒ-180ESC to meet Canada code compliance.

ENERGY STAR 5.0 Requirements

For Canada, ENERGY STAR version 5.0 went into effect on January 1, 2020. These new requirements mean that windows and doors now must meet a minimum Energy Rating (ER) of 34. To meet that condition, dual pane units need to balance a high solar heat gain coefficient (SHGC) with a low U-Factor.

LoĒ-Di89: Made for Canada

LoĒ-Di89 is engineered to help more windows and doors meet the new Energy Rating of 34 throughout Canada. LoĒ-Di89 is a coating applied to the 3rd and 4th surface of a dual pane unit which allows more energy from the sun to enter the home while the low U-Factor keeps the heat in.

LoĒ-Di89 is available in a variety of custom shapes and sizes and can be heat-strengthened or tempered. In some configurations heat-strengthening may be recommended to mitigate against the effects of thermal stress.

Performance Matters

The design of a window or door requires a careful selection of materials like the sash, frame, decorative bars, as well as the glass. All of these pieces can affect the total performance values of a completed product. Therefore, some glazing options can be more advantageous for particular designs over others.

With LoĒ-Di89 glass, the advantage lies in the combination of a very high solar heat gain coefficient (SHGC) and a very low U-Factor. The high SHGC allow more passive heat from the sun to enter the home, and the low U-Factor helps retain heat within the home’s interior.

The below table shows how LoĒ-Di89 provides a very low U-Factor with a high SHGC, which contributes to the overall ER of the finished window or door.

IG Type
and Coating
Clear / 180ESC
180ESC / i89
Clear / Di89
    Visible light
    Trans-
    mittance
  • 80%
  • 78%
  • 89%
    External
    Reflectance
  • 15%
  • 15%
  • 14%
    SOLAR
    HEAT GAIN
    COEFFICIENT
  • 0.70
  • 0.64
  • 0.71
    U-Factor
    IP
  • 0.27
  • 0.21
  • 0.23
    SI
  • 1.53
  • 1.19
  • 1.30
Configuration: 2-pane IG unit with 3 mm glass and ½” airspace at a 90% argon fill.
Note that LoĒ-Di89 provides a better combination of high SHGC and low U-Factor, contributing more to a higher ER than even LoĒ-180ESC or LoĒ-180ESC/LoĒ-i89.
DEFINITIONS

Note: All values calculated using LBNL Window 7. (See https://windows.lbl.gov/software and https://windows.lbl.gov/software/window for more information on glass optical data and the LBNL Window 7 program.)

Solar Heat Gain Coefficient - (SHGC) - The amount of solar radiation that enters a building as heat. The lower the number, the better the glazing is at preventing solar gain.

U-Factor - This represents the heat flow rate through a window expressed in W/m²·K (SI units) or BTU/hr·ft²·°F (IP units), using winter night weather conditions of -18°C (0°F) outside and 21°C (70°F) inside. The lower the number, the better the window system is at reducing heat loss.

More Options for Better Results

For window and door companies who sell in the Canadian market, LoĒ-Di89 glass is one of many wise choices for energy-efficient windows. Not only does it provide great insulting value with a high solar passive design, it makes it easier for more product designs to meet the advanced ENERGY STAR codes for 2020.

To best understand how LoĒ-Di89 can fit into your overall fenestration needs for windows and doors, please contact your window manufacturer, contractor or architect.

Cardinal Innovation:
Stay comfortable, save heating cost and meet Canadian code requirements with an attractive, versatile two-pane window.

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