4300 | Casement Vinyl Window

4300 Casement Vinyl Window

When you’re looking for the best of the best, the Comfort Series 4300 casement windows can’t be beat! These windows are the envy of our competition because our casements have air infiltration ratings that are tighter than some of our competitors’ fixed windows!

One of the most important features of the casement window is the operating mechanism. After all, if the window doesn’t open and close with ease, it won’t be a customer favorite. That’s why we installed roto crank hardware with unbelievable leverage and power. The days of sticking sashes are gone with this hardware! We also include a foldaway handle, which is standard on all casements. The 4700 fixed window complements the 4300 casement as a stand-alone fixed window or can be used to mull fixed and specialty shapes in order to create custom configurations.

With twenty-one chambers of fusion-welded vinyl, this casement has uncommon strength, warmth and overall long-term performance characteristics. We seal the 4300 with two heavy compression bulbs and a third secondary exterior seal that blocks the weather before the interior compression seals even have to work!

To ensure the tightest possible full perimeter seal, we use a multi-point lock system along with interlocking hinge side locks. If you’re looking for a weakness in this window, you won’t find one!

The 4300 will impress the most discriminating customer. For the best in performance and operation, the 4300 Comfort Series casement is the ultimate choice!

4300 Series | Features

Value Added Features such as Mulling, Extension Jambs, Brick Mold and Specialty Shapes are also available - click here to read more.

Triple-Seal Weatherstripping

Triple-Seal Weatherstripping: Two compression bulb seals and one fin-seal weatherstrip provide the best seal in the market.

Multi-Point Locking

Multi-Point Locking: Our convenient locking handle will lock the sash in up to 4 locations (depending on sash height) pulling the sash in tight and true to the frame.


Hardware: We use Truth's Maxim Rotocrank hardware with a folding, self-nesting crank handle. This is the finest hardware available and offers an easy, tight operation with no extra "play" when opening and closing the sash. The cranking power and leverage in all positions are the best of any hardware available.


Frame: Our casement has a 3 1/4" frame depth with a slimline frame profile. The frame and sash are fully fusion-welded extruded UPVC.

The 4300 casement comes with 3/4" insulated clear or argon filled LoÉ3 high performance glass. Triple glazed, Double LoÉ or laminate glass options are also available.

4300 Series | Test Results

NFRC - AAMA - Energy Star
U-Value .251 - .202 - .173
U-Value / Air Only*
4300, 4700HP, 4700LP
.28, .29, .29
Solar Heat Coefficient .181 - .17 Triple Glaze2
Visible Light Transmittance .431 - .39 Triple Glaze2
Condensation Resistance Factor 621 - 69 Triple Glaze2

*U-Values for our windows with 1/8" 366 LoÉ3 glass, air only, 1/8" clear glass, no muntins or argon in the air space.

1Thermal value w/ 3/4" OA, 1/8” 366/argon, 1/8" clear/argon, clear - No Muntins

2Thermal value w/ 1-3/8" OA ,1/8” 366/argon, 1/8" 366/argon, clear - No Muntins

3Thermal value w/ 1-3/8" OA ,1/8” 366/argon, 1/8" clear/argon, 180 (270 and 272 may be used in place of 366. Values are without muntins)

Test Window | 1 Lite 24" x 48"
Air Infiltration .02 cfm/sq. ft.
Water 12 psf
Structural 135 psf
Indoor/Outdoor Sound Transmission Class 27
Sound Transmission Class(w/ 1/4 LAM x 1/8 A) 33
AAMA Rating CW-PG90-C
Test Window | 1 Lite 32" x 60"
Air Infiltration .02 cfm/sq. ft.
Water 12 psf
Structural 75 psf
Indoor/Outdoor Sound Transmission Class 27
Sound Transmission Class(w/ 1/4 LAM x 1/8 A) 33
AAMA Rating CW-PG50-C
Test Window | 1 Lite 36" x 72"
Air Infiltration .02 cfm/sq. ft.
Water 6.75 psf
Structural 60 psf
Indoor/Outdoor Sound Transmission Class 27
Sound Transmission Class(w/ 1/4 LAM x 1/8 A) 33
AAMA Rating CW-PG40-C

Tested and Certified to AAMA/WDMA/CSA 101/I.S.2/A440-05 & A440-08 U-Value/SHGC/VT/CRF Tested to NFRC 100/200/500

4300 Series | Colors

  • WhiteWhite
  • TanTan
  • SandstoneSandstone
  • MidnightMidnight/Midnight
  • Midnight/WhiteMidnight/White