The Comfort Series 4400 sliding glass door has been transformed from a great door to an unbelievable door! Our second-generation door has even surprised those who are not easily impressed. We wanted a door that out-shines all other sliding doors in weather tightness, ease of operation, and long-term high performance. We got what we were looking for.
This door features unbelievable strength against the elements with multiple areas of heavy internal aluminum reinforcements and multi-chambered fusion-welded vinyl. Fixed transoms and side lites are also available for the 4400 sliding glass patio door.
Value Added Features such as Extension Jambs are also available - click here to read more.
NFRC | TEST RESULTS | |
U-Value | .29 |
U-Value / Air Only* | .33 |
Solar Heat Coefficient | .23 |
Visible Light Transmittance | .54 |
Condensation Resistance Factor | 58 |
*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. Thermal Value w/ 1" OA 1/8" 366/Argon/ 1/8" Clear - No Muntins |
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AAMA | TEST RESULTS | |
Test Window | 2 Equal Lite 95-1/2" x 95-1/2" | |
Air Infiltration | .05 cfm/sq. ft. |
Water | 4.5 psf |
Structural | 45 psf |
Indoor/Outdoor Sound Transmission Class | 28 |
Sound Transmission Class(w/ 1/4 LAM x 1/8 A) | 34 |
AAMA Rating | LC-PG30-SD |
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 |