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HEAT-SMART® WINDOW SYSTEMS

Heat-Smart® Window Systems offer three levels of thermal protection. The charts below show the comparative performance of each Loewen window system and will help you better understand their benefits.

Learn more about thermal design.

HEAT-SMART®, X

Good. Double glazed, with one layer of Low E² coating and one 1/2" air space filled with argon gas*.

HEAT-SMART® T, XT

Best. Triple glazed, with two layers of Low E² coatings and two 1/2" air spaces filled with argon gas*.

Heat-Smart® Window Systems also protect furnishings by screening out much of the damaging ultraviolet rays that enter the home. This reduces fading and related damage.

ADDITIONAL GLAZING STANDARDS

  • Loewen uses 1/8" double strength glass, giving vast improvement to strength, durability and clarity over thinner glass.
  • All standard sealed units feature machine applied butyl primary sealant and polyisobutyl secondary sealant. This reduces the chance of seal failure, improves argon gas retention and increases strength.
  • Minimal use of exposed exterior caulking on glass surface for a clean, aesthetically pleasing appearance.
  • All standard Loewen sealed units are argon gas filled with no spacer bar piercing*.
  • Glazing fabrication is automated.
  • Our automated glazing assembly line allows robots to excel at what they do best — precise, repetitive tasks — and lets our skilled operators concentrate on issues of quality and performance. The robotic line creates Loewen sealed units with the glass in a vertical position, which prevents the irregularity caused by deflection (glass sagging during production) that can rob units of their hermetic seal over time.
  • Specially treated glass designed for southern exposures and hot climates is available.

***Ashrae calculated values Window 4.1. 12mm airspace (0.5 inches). Does not apply to sealed units with capillary tubes installed.

Information shown in the following charts compares the center of glass performance levels of the sealed unit only when manufactured with different glazing options offered by Loewen. It is not representative of overall window performance, which depends on many factors including grille options, such as simulated divided lites, or grilles between glass, product size and configuration. This information cannot be used to calculate energy consumption, to determine resistance to condensation or to develop assumption about suitability for use or compliance with any energy code. For overall performance of specific windows or doors, refer to “NFRC U-Factor and SHGC/VT” information as published in the Loewen Technical Guide or Architectural Catalogue.