- Frame Depth: 2-7/8″
- Insulating Glass Unit Depth: 7/8″
- Soft Coat Low-E & Argon Filled IGU
– Maximizes energy efficiency. - Corrosion-Resistant Two-Wheel Duel Adjusting Brass Rollers
- Fusion Welded Frame & Sashes
- Removable Sashes
– Safe, easy cleaning of both sashes - Double-Seal Weatherstripping
- Integral Nailing Fin
- Integral J-Channel
Series 420 Vinyl Fully Welded New Construction Single Slider Windows
Series 420 Vinyl Fully Welded New Construction Single Slider Windows
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This Crystal® ThermoBlok™ fully welded sliding [new construction] vinyl window is manufactured with exclusive chambered ThermoBlok™ designer extrusions. These ThermoBlok™ extrusions feature innovative insulating air barrier technology that reduces thermal transference from exterior of window frame to interiors, and “intercept” warm edge glass spacer technology for added thermal protection. These features reduce heating and cooling loads on HVAC systems, providing long-term energy efficiency and utility savings to property owners. This value priced series is ideal for home renovation projects and features easy-to-clean.