ENERGY STAR Most Efficient 2020 — Sliding Glass (Patio) Doors

Most Efficient 2020

The ENERGY STAR Most Efficient 2020 designation recognizes the most efficient products among those that qualify for the ENERGY STAR program. These sliding glass (patio) doors represent the leading edge in energy efficient products this year. Access the full ENERGY STAR Most Efficient certified products list in Excel (EXCEL, 53 KB). Illustrations of all ENERGY STAR window types. Most Efficient recognizes a subset (PDF, 701KB).

Notes on Abbreviations:

CPD National Fenestration Rating Council
Certified Products Directory (link is external)
SHGC Solar Heat Gain Coefficient
PG Performance Grade

ENERGY STAR Climate Zones (PDF, 2.7 MB)

N Northern Zone
NC North-Central Zone
SC South-Central Zone
S Southern Zone

Kolbe & Kolbe Millwork Co., Inc.

Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Forgent Sliding Patio KKM-K-250 0.18-0.19 0.14-0.40 Composite 40
Ultra/VistaLuxe Gardenaire 2-1/4" Panels KKM-K-237 0.20 0.14-0.42 Wood and Clad Wood 35

Pella Corporation

Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Pell 350 Series Triple-Pane Sliding Patio Door with Advanced Low-E IG PEL-N-161 0.19-0.20 0.21-0.23 Vinyl 50 N, NC

Thermo-Tech Windows and Doors

Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Thermo-Tech French Door TTW-A-26 0.18-0.20 0.13-0.44 Vinyl 20 N, NC, SC, S
Thermo-Tech Slim Door TTW-A-27 0.17-0.20 0.15-0.50 Vinyl 25 N, NC, SC, S