Milgard SunCoat®/SunCoatMAX® Low-E Glass

SunCoatMAX™ and SunCoat™ low-e windows and window coating –
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SunCoat® Low-E2 Glass

This microscopically thin coating is applied to one side of the glass to reflect heat from its source in the summer, keep heat inside in the winter and reduce harmful UV rays. SunCoat Low-E2 glass comes standard on all Milgard dual-pane windows and patio doors

Benefits to You:

  • Consistent temperatures for greater year-round comfort = Saving energy
  • Reduces harmful UV rays by up to 84 percent = Helping protect that new couch or carpet from the sun's damaging rays.
Glass Product Visible Light Transmittance (higher is better) Solar Heat Gain Coefficient (lower is better) Winter Heat Loss - U-Factor (lower is better)
Clear single-pane 90% 0.86 1.04
Clear double-pane 81% 0.76 0.48
Hardcoat Low-E* 75% 0.72 0.35
Gray tinted* 55% 0.58 0.48
SunCoat® Low-E2 glass 70% 0.37-0.41 0.30
SunCoatMAX® * Low-E3 glass 66% 0.27 0.29

Note: All values calculated using Window 5.2 and represent center of glass properties. (See http://windows.lbl.gov/software/default.htm for more on the Window program.) All glass is 3mm thick, and ½" gap width. This is for comparable purposes only, your values may differ. Does not account for the affects of the frame and sashes with respect to the thermal information.

  • * Used as one pane in a double-pane glass unit.
  • Hard-coat Low-E with 0.20 emittance.

SunCoatMAX® Low-E3 Glass

Glass Illustration

SunCoatMAX Low-E glass provides the best clarity and highest performance of all solar gain Low-E glass products.

Benefits to You:

  • Increases center glass surface temperature in winter = Comfortable, consistently cozy rooms.
  • Reduces solar heat gain another 34 percent over two-coat, Low-E glass = Keeps your house cooler in the summer.
  • Provides up to 95 percent ultraviolet light blockage = Additional protection from UV-A and UV-B rays for your fabrics and other furnishings.

Milgard's SunCoatMAX even increases comfort in cooler temperatures. This chart show the glass surface temperatures at two different outside temperatures. Milgard 's SunCoatMAX maintains a higher interior surface glass temperature, even in the coldest temperatures. Why is this important? The Efficient Windows Collaborative suggests that when glass surface temperatures fall below 52 degrees F, there is a risk of thermal discomfort.

Glass Product Temp at Center of Interior Glass When -20°F Outside Temp at Center of Interior Glass When +20°F Outside
Clear single-pane 31°
Clear double-pane 37° 51°
Hardcoat Low-E* 47° 58°
SunCoat® Low-E2 glass 52° 61°
SunCoatMAX® * Low-E3 glass 52° 61°

Note: All values calculated using Window 5.2 and represent center of glass properties. (See http://windows.lbl.gov/software/default.htm for more on the Window program.) All glass is 3mm thick, and ½" gap width. This is for comparable purposes only, your values may differ.

  • * Used as one pane in a double-pane glass unit.
  • Hard-coat Low-E with 0.20 emittance.
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