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		Pella Commercial double-hung and single-hung windows: Offer a virtually unlimited range of size options, including sizes up to 5' wide x 10' high Are built to order in 1/4" increments Performance up to DP 50* Feature many design options including a contemporary style that is popular in schools Are available with fixed glass companion units and transoms Architect Series® double-hung window with HurricaneShield® impact resistant glazing rated up to Missile D for Wind Zone 3. * Performance class and grade rating and related hallmark certification apply to single units only with appropriate glass options and not the combined or composite units.

	Operable Units (frame dimensions*)	1' 1 3/4" (349)	5' 0" (1524)	2' 3/8" (619)	10' 0" (3048)
	Nonoperable companion units (frame dimensions*)
	• Rectilinear (maximum of 50 square ft)	8" (203)	10' 0" (3048)	8" (203)	10' 0" (3048)
	• Curve Top Maximum area of 38 sq. ft for all curve tops except for half circles and full arch heads, where the maximum area is 50 sq. ft. (when measured as a rectangle).	1' 2" (356)	9' 0" (2743)	10 1/2" (267)	8' 0" (2438)
	*Opening = frame + 3/4" Sizes listed in parenthesis denote millimeters. Larger & smaller sizes available on custom basis. See your local Pella sales representative for more information.

	Between-the-glass Slimshade® mini-blinds
	Between-the-glass cellular fabric shades
	Between-the-glass decorative panels
	Woods
	Pine
	Mahogany
	Alder
	Douglas Fir
	Grilles
	Historical grilles (permanent interior and exterior)
	Applied grilles (permanent interior and exterior)
	Removable between-the-glass (clad-matched exterior and     wood interior)
	Removable interior grilles (wood)
	Grilles-between-the-glass (White interior, exterior finish matches     aluminum-cladding color)
	Hardware
	Champagne, White, Brown, Bright Brass, Satin Nickel, Oil-Rubbed Bronze*
	Antique Brass, Chrome
	Rocky Mountain Hardware** (solid bronze)
	Screens1
	Flat (fiberglass)
	Vivid ViewTM (high transparancy fabric2)
	Rolscreen®
	* Oil-Rubbed Bronze is a living finish that will develop its own unique patina with use. ** Rocky Mountain Hardware is not available on all double-hung windows. See representative for availability. 1Warning: Use caution when children or pets are around open windows and doors. Screens are not designed to retain children or pets. 2Made with

	Clear Insulating Glass
	Low-E Insulating Glass with argon*
	Dual Glazing with Between-the-Glass Options
	Triple Glazing with Between-the-Glass Options
	Laminated Glass
	Impact Resistant Glass
	Tinted Glass
	Reflective Glass
	Spandrel glass or panels
	* High-altitude Low-E insulating glass does not contain argon gas.

	NFRC U-value Total Unit (47" x 49")	0.31 - 0.53	0.25 - 0.51	0.32 - 0.50	0.29 - 0.533
	Design Pressure* (psf)	30 - 50	30 - 50	30 - 50	20 - 90
	Structural Test Pressure (psf)	45 - 75	45 - 75	45 - 75	30 - 135
	Water Penetration	none @ 4.5 - 7.5 psf	none @ 4.5 - 7.5 psf	none @ 4.5 - 7.5 psf	none @ 15 psf
	Air Infiltration (@ 1.57 psf)	0.30 cfm	0.30 cfm	0.30 cfm	0.05 cfm
	* Performance class and grade rating and related hallmark certification apply to single units only with appropriate glass options and not the combined or composite units. 3For 48" x 48" windows

	Winter NFRC U-value	0.25 - 0.51	0.16 - 0.50	0.25 - 0.51	0.25 - 0.51
	Solar Heat Gain Coefficient	0.32 - 0.79	0.26 - 0.79	0.41 - 0.79	0.32 - 0.79
	Shading Coefficient	0.37 - 0.91	0.31 - 0.91	0.47 - 0.91	0.37 - 0.91
	% UV Transmission	7 - 62	5 - 63	16 - 62	7 - 62
	LBL Fading Damage4	0.18 - 0.64	0.15 - 0.65	0.33 - 0.64	0.18 - 0.64
	% Visible Light Transmission	40 - 83	33 - 83	72 - 83	40 - 83
	4Developed by Lawrence Berkeley Laboratories, the LBL damage function is a better predictor of fading damage than UV transmission. Lower values indicate less fading potential. (NOTE: This value does not consider visible light.)

	STC Rating	27 - 35	30 - 33	27	28 - 36
	OITC Rating	23 - 31	23 - 27	22	24 - 32
	5Performance based on standard glass options.

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