Pella® Impervia® Casement
Detailed Product Description

Frame 
•	Frame is Duracast—five-layer pultruded fiberglass material [with optional foam insulation1] reinforced with a Pella patented interlocking mat.  
•	Overall frame depth is 3-1/4".  
•	Nominal wall thickness of Duracast® fiberglass composite members is .050" to .090" thick.
•	Frame corners are mitered, joined and bonded with corner lock and injected with sealant. 
•	Jambs contain factory-drilled installation screw holes on block frame.
•	Optional factory-applied jamb extensions available in 4-9/16" and 6-9/16".
Sash 
•	Sash is Duracast fiberglass composite — five-layer pultruded fiberglass material, reinforced with a Pella patented interlocking mat.  
•	All sash members have mitered corners bonded with corner lock and sealed with injected sealant. 
Exterior/Interior 
•	Duracast fiberglass composite surfaces with powder-coat paint finish.
•	Color is [White] [Brown] [Black] [Tan] [Morning Sky Gray].
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•	Dual-color option [Brown] [Black] [Tan] [Morning Sky Gray] exterior with White interior2.
Glazing System
•	Quality float glass complying with ASTM C 1036.
•	11/16" insulating glass [[annealed] [tempered]] [obscure3] [[clear] [Advanced] [SunDefense™] [SunDefense+] [AdvancedComfort] [NaturalSun] [NaturalSun+] Low-E coated, with argon]] sealed and bonded to sash.
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•	1" Triple-pane insulating glass [annealed] [tempered] [obscure 3] [clear] [[Advanced] [SunDefense™] [AdvancedComfort] [NaturalSun] Low-E coated, [with argon]]] [[bronze] [gray] [green] Advanced Low-E [with Argon]] sealed and bonded to sash 
•	High altitude glazing [with argon] available.
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Impact-Resistant
•	Silicone-glazed 1" dual-seal impact-resistant insulating glass [SGP] [PVB]. [[tempered] [annealed]] exterior light is [[Advanced Low-E] [SunDefense] [clear] [bronze]]. Laminated clear interior light.
– or –
•	Silicone-glazed 11/16" dual-seal impact-resistant insulating glass PVB. [[tempered] [annealed]] exterior light is [[Advanced Low-E] [SunDefense] [clear]]. Laminated [clear] interior light, or [[tempered] [annealed]] exterior light is [multi-layer Low-E]. Laminated [bronze] interior light.
Dual Weather Stripping
•	Continuous, flexible ThermoPlastic Vulcanizate material in dual durometer design, compressed between frame and sash for positive seal on all four sides. 
•	Secondary ThermoPlastic Vulcanizate leaf-type weather strip between edge of sash and frame.
Hardware 
•	Easy-Slide operator assembly
•	 Hardened, nickel-coated Steel worm and wheel gears. 
•	Zinc-magnesium alloy hob and gearbox with corrosion-protecting ultra-clear finish. 
•	5 ball bearings. 
•	Stainless steel swing arm and hinge pin for extra corrosion protection of exposed components. 
•	Kevlar-reinforced drive belt. 
•	Harsh environment approved – ASTM B 117 salt chamber and debris cycling, 20,000 life cycle test approved. 
•	Optional Easy-Slide operator with Accessibility Lock Lever assembly
•	6" elongated lock lever
•	5lb operational forces available on sizes when FW is ≤ 35" and FH is ≤ 72.5" or FW > 35" but ≤ 36" and FH ≤ 60"
– or – 
•	Roto operator assembly
•	Steel worm gear sash operator with hardened gears.
•	Operator base is zinc die cast with painted finish. 
•	Operator linkage, hinge slide, and hinge arms are 300 series stainless steel. 
•	Exposed fasteners are stainless steel. 
•	Hardware shall exceed 1,000 hours salt spray exposure per ASTM B 117. 
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•	Finish of integrated folding crank is [baked enamel [White] [Brown] [Tan] [Matte Black] [Morning Sky Gray]] [Satin Nickel (Roto operator only)]. All vent units are available with left- or right-hand hinging. 
•	Unison Locking System—A single handle locking system operates positive-acting arms that reach out and pull the sash into a locked position: one installed on units 27-1/2" and smaller frame height, two unison operating locks installed on units over 27-1/2" frame height, three unison operating locks over 72-1/2”. 
•	Lock handle finish is [baked enamel [White] [Brown] [Matte Black] [Tan] [Morning Sky Gray]] [Satin Nickel (Roto operator only)]. 
Optional Products
Screens
•	InView™ screens
•	Vinyl-coated 18/18 mesh fiberglass screen cloth complying with SMA 1201, set in aluminum frame fitted to inside of window, supplied complete with all necessary hardware.
•	Screen frame finish is baked enamel, color to match interior.
Grilles
•	Grilles-Between-the-Glass
•	Insulating glass contains 3/4" contoured aluminum grilles permanently installed between two panes of glass.
•	Grilles are factory prefinished [White] [Brown] [Black] [Tan] [Morning Sky Gray] to match interior and exterior finish.
Hardware
•	Optional limited opening hardware available for vent units in stainless steel; nominal 3" opening.
•	Optional window opening control device available for field installation. Device allows window to open less than 4" with normal operation, with a release mechanism that allows the sash to open completely. Complies with ASTM F2090-10. 

(1)	Foam insulation inserts are not available with clear glazing.
(2)	Dual-color finish is not available on products with integral nailing fin.
(3)	Obscure glazing is not available when AdvancedComfort Low-E coated IG is specified.