R5 Triple-Glazed Windows and Patio Doors

Eco-Friendly

Common Energy Star windows and patio doors only have an R rating of 3. We designed a series with an R rating of 5.

How Much Difference Does the R5 Window Make?

An R5 rating translates to a reduction in heat loss through glass of up to 40% or more compared to regular windows and the potential for significantly reduced energy costs.

Heat and cold transfer through windows causes approximately 30% of heating and cooling energy costs nationally. That is an annual 4.31 quadrillion BTU of energy consumption.

R5 = U-Factor 0.20

An R-value of 5 is the same as a U-factor rating of 0.20.

Benefits

  • Reduced heat loss in the winter, better than typical Energy Star or Low-E windows
  • Potential for significant reduction in energy costs
  • Moderate to significant reduction in noise levels compared to double pane windows

Features

  • Triple-Glazed: the insulated glass unit has three panes of glass
  • Krypton Gas Filled Between the Panes: Krypton has significantly better insulating qualities than Argon
  • Double Low-E glass: Low-E is on the exterior pane and the center pane

Lang Windows and Patio Doors with the R5 Upgrade

R5 is available on all Lang vinyl windows and patio doors, except Rezilience:

Powerweld Series
Platinum Series
Renaissance Series
Glide Patio Doors (Vinyl)