ENERGY STAR Most Efficient 2023 — Casement Style (Awning, Projected, Hopper, Tilt-and-Turn, etc.) Windows

Most Efficient 2023The ENERGY STAR Most Efficient 2023 designation recognizes the most efficient products among those that qualify for the ENERGY STAR program. These vertical slider windows represent the leading edge in energy efficient products this year. Access the full ENERGY STAR Most Efficient certified products list in Excel (EXCEL, 64 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

Andersen Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
A-Series Casement AND-N-86 0.20 0.11–0.34 Composite 50 N, NC, SC, S
A-Series Awning AND-N-87 0.20 0.11–0.33 Composite 50 N, NC, SC, S
A-Series Transom Venting AND-N-90 0.20 0.12–0.34 Composite 50 N, NC, SC, S
Renewal By Andersen® Casement Window AND-N-102 0.19-0.20 0.17–0.25 Other 40 N, NC, SC, S
Renewal By Andersen® Awning Window AND-N-103 0.20 0.17–0.25 Other 40 N, NC, SC, S

Associated Materials, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
80 Series A682 ASO-A-107 0.15–0.20 0.05–0.30 Vinyl 65 N, NC, SC, S
80 Series A681 ASO-A-108 0.15–0.20 0.05–0.30 Vinyl 40 N, NC, SC, S
Awning - 8051/9051/2/3/4/5 ASO-A-31 0.16–0.20 0.14–0.32 Vinyl 35 N, NC, SC, S
Casement - 8071/9071/2/3/4/5 ASO-A-32 0.16–0.20 0.14–0.32 Vinyl 40 N, NC, SC, S

Capitol Glass/Northerm Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
3800 Awning Triple Glaze NRW-A-8 0.19 0.16–0.23 Vinyl 60 N, NC, SC, S
3800 Casement Triple Glaze NRW-A-7 0.19 0.16–0.23 Vinyl 65 N, NC, SC, S

EnergyWall Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8450 Casement Window EWW-M-9 0.14–0.20 0.13–0.31 Vinyl 70 N, NC, SC, S
8460 Awning Window EWW-M-10 0.14–0.20 0.13–0.31 Vinyl 40 N, NC, SC, S
7450 Casement Window EWW-M-17 0.15–0.20 0.14–0.34 Vinyl 20 N, NC, SC, S
7460 Awning Window EWW-M-18 0.15–0.20 0.14–0.34 Vinyl 30 N, NC, SC, S

Gilkey Window Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1000 Series Casement GWD-M- 28 0.17–0.19 0.11–0.24 Fiberglass 90 N, NC, SC, S

Great Lakes Window
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
HarborLight/ComfortSmart/ecoSmart GLW-M-114 0.15–0.20 0.13–0.25 Vinyl 70 N, NC, SC, S
HarborLight/ComfortSmart/ecoSmart GLW-M-116 0.15–0.20 0.13–0.24 Vinyl 70 N, NC, SC, S

GWD, LTD dba Gerkin Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Comfort Series GER-K- 2 0.2–0.2 0.26–0.26 Vinyl 40 N, NC, SC, S

Ideal Window Manufacturing, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
3900 Casement IAP-M-34 0.19–0.20 0.19–0.21 Vinyl 60 N, NC, SC, S
4000 Awning IAP-M-33 0.19–0.20 0.19–0.21 Vinyl 60 N, NC, SC, S

Interstate Window & Door Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
9800 AWN (CompositWood®) IBM-K-29 0.14–0.20 0.19–0.26 Composite 30 N, NC, SC, S
9400 AWN (Architectural Series) IBM-K-41 0.14–0.20 0.15–0.27 Composite 30 N, NC, SC, S
8800/6800/440 CS - 8800/6800/440 FX IBM-K-50 0.15–0.20 0.21–0.27 Vinyl 30 N, NC, SC, S
8800/6800/440 AWN IBM-K-51 0.15–0.20 0.21–0.27 Vinyl 50 N, NC, SC, S

JELD-WEN, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Premium Vinyl (V-4500) Casement JEL-A-595 0.17–0.20 0.13–0.23 Vinyl 50 N, NC, SC, S
Premium Vinyl (V-4500) Awning JEL-A-596 0.17–0.20 0.13–0.23 Vinyl 50 N, NC, SC, S

Joyce Manufacturing Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Insulator INCA JMC-K-9 0.18–0.20 0.13–0.21 Vinyl 60 N,NC, SC, S

Kohltech International, Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Supreme KOI-A-56 0.17–0.18 0.18–0.39 Vinyl 70 N, NC, SC, S
Supreme KOI-A-57 0.17–0.18 0.18–0.39 Vinyl 70 N, NC, SC, S
6000 Plus KOI-A-63 0.17–0.17 0.18–0.20 Vinyl 55 N, NC, SC, S
6000 Plus KOI-A-64 0.17–0.17 0.18–0.20 Vinyl 40 N, NC, SC, S
Select KOI-A-66 0.17–0.18 0.19–0.40 Vinyl 70 N, NC, SC, S
Select KOI-A-67 0.17–0.18 0.19–0.40 Vinyl 30 N, NC, SC, S
2020 Supreme Casement KOI-A-92 0.15–0/20 0.22–0.46 Vinyl 55 N, NC, SC, S
2020 Supreme Awning KOI-A-95 0.15–0/20 0.22–0.46 Vinyl 55 N, NC, SC, S

Kolbe Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Ultra Awning 2-1/4" sash KKM-K-160 0.20 0.14–0.37 Wood and Clad Wood 45 N, NC, SC, S
Ultra Casement 2-1/4" sash KKM-K-159 0.20 0.14–0.22 Wood and Clad Wood 65 N, NC, SC, S
VistaLuxe Awning KKM-K-196 0.19 0.13–0.42 Composite 50 N, NC, SC, S
VistaLuxe Casement KKM-K-194 0.19–0.20 0.13–0.43 Composite 50 N, NC, SC, S

Marvin Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Elevate Casement MAR-N-250 0.20 0.23–0.27 Fiberglass 50 N, NC, SC, S
Elevate Awning MAR-N-251 0.20 0.23–0.27 Fiberglass 50 N, NC, SC, S
Ultimate Casement MAR-N-342 0.19–0.20 0.14–0.26 Wood and Clad Wood 40 N, NC, SC, S
Ultimate Awning MAR-N-343 0.19–0.20 0.14–0.39 Wood and Clad Wood 40 N, NC, SC, S
Ultimate Wood Casement MAR-N-347 0.20 0.13–0.24 Wood and Clad Wood 50 N, NC, SC, S
Ultimate Wood Awning MAR-N-354 0.20 0.13–0.23 Wood and Clad Wood 50 N, NC, SC, S
Ultimate Awning Pushout MAR-N-360 0.20 0.14–0.25 Wood and Clad Wood 30 N, NC, SC, S
Ultimate Casement Stationary Polygon MAR-N-437 0.19–0.20 0.14–0.26 Wood and Clad Wood 50 N, NC, SC, S

Mathews Brothers Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Sanford Hills Casement MBC-M-51 0.19–0.20 0.21–0.37 Vinyl 65 N, NC
Sanford Hills Awning MBC-M-52 0.20 0.21–0.37 Vinyl 40 N, NC

MI Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
9770 PVC Operating Casement Window MEI-A-170 0.15–0.20 0.07–0.23 Vinyl 50 N, NC, SC, S
9660 PVC Operating Awning Window MEI-A-171 0.15–0.20 0.07–0.23 Vinyl 35 N, NC, SC, S
CertainTeed Casement/ 9000 Series 9770 Vinyl Casement/ Designer Series 1675 Casement MEI-A-170 0.18–0.18 0.12–0.20 Vinyl 50 NC, SC, S
CertainTeed Awning/ Designer Series 1665 Awning/ 9000 Series 9660 Vinyl Awning MEI-A-171 0.18–0.18 0.18–0.35 Vinyl 40 N, NC

Milgard Manufacturing, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8220.8230.8370 Single Hung MIL-A-225 0.18–0.20 0.19–0.43 Vinyl 25 N, NC, SC, S
8120.8130.8170 Horizontal Slider MIL-A-224 0.18–0.20 0.19–0.43 Vinyl 40 N, NC, SC, S
8520.8521.8530.8531.8570.8571 Casement MIL-A-227 0.17–0.20 0.17–0.39 Vinyl 60 N, NC, SC, S
8420.8421.8430.8431.8470.8471 Awning MIL-A-226 0.17–0.20 0.17–0.39 Vinyl 40 N, NC, SC, S
8320.8330 Picture Window MIL-A-229 0.16–0.20 0.20–0.45 Vinyl 40 N, NC, SC, S
8360/8370 Picture Window MIL-A-236 0.16–0.20 0.20–0.45 Vinyl 50 N, NC, SC, S

National Vinyl LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Northwind III/ Trustgard/ Destiny/ Northwind Builder Remodeler NVP-K-17 0.17–0.29 0.20–0.23 Vinyl 25 N, NC, SC, S
Northwind III/ Trustgard/ Destiny/ Northwind Builder Remodeler NVP-K-18 0.17–0.20 0.21–0.23 Vinyl 55 N, NC, SC, S
Northwind III/ Trustgard/ Destiny/ Northwind Builder Remodeler NVP-K-19 0.17–0.20 0.21–0.23 Vinyl 50 N, NC, SC, S

OKNA Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Casement – 700 Series OKW-K-26 0.16–0.20 0.22–0.24 Vinyl 70 N, NC, SC, S
HIMARK – 1060 OKW-K-43 0.15–0.16 0.21–0.24 Vinyl 80 N, NC, SC, S
Starmark – EVO – 7560 OKW-K-50 0.13–0.16 0.15–0.24 Composite 80 N, NC, SC, S

Pella Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Pella 250 Series Casement Triple Pane Advanced IG PEL-N-239 0.20 0.19–0.20 Vinyl 50 N, NC, SC, S
Pella 250 Series Awning Triple Pane Advanced IG PEL-N-241 0.20 0.19–0.21 Vinyl 50 N, NC, SC, S
350 Series Casement (Nail Fin) PEL-N-184 0.17–0.20 0.18–0.20 Vinyl 60 N, NC, SC, S
350 Series Casement (Pocket Frame) PEL-N-188 0.17–0.20 0.18–0.20 Vinyl 60 N, NC, SC, S
350 Series Awning (Nail Fin) PEL-N-187 0.17–0.20 0.18–0.20 Vinyl 60 N, NC, SC, S
350 Series Awning (Pocket Frame) PEL-N-189 0.17–0.20 0.18–0.20 Vinyl 55 N, NC, SC, S
Pella Architect Series Aluminum Clad Fixed Casement with Advanced Low-E Triple IG PEL-N-1 0.17–0.20 0.21–0.27 Wood and Clad Wood 30 N, NC, SC, S
Pella Architect Series Aluminum Clad Fixed Casement with SunDefense Low-E Triple IG PEL-N-1 0.17–0.20 0.16–0.20 Wood and Clad Wood 30 N, NC, SC, S
Pella Architect Series Aluminum Clad Fixed Casement with NaturalSun Low-E Triple IG PEL-N-1 0.17–0.20 0.35–0.44 Wood and Clad Wood 30 N, NC
Pella Architect Series Aluminum Clad Casement with Advanced Low-E Triple IG PEL-N-11 0.19–0.20 0.21–0.23 Wood and Clad Wood 50 N, NC, SC, S
Pella Architect Series Aluminum Clad Casement with SunDefense Low-E Triple IG PEL-N-11 0.19–0.20 0.16–0.17 Wood and Clad Wood 50 NC, SC, S
Pella Architect Series Aluminum Clad Casement with NaturalSun Low-E Triple IG PEL-N-11 0.19–0.20 0.36–0.39 Wood and Clad Wood 50 N, NC
Pella Architect Series Aluminum Clad Casement with NaturalSun Low-E Triple IG PEL-N-30 0.19–0.20 0.21–0.23 Wood and Clad Wood 50 N, NC, SC, S
Pella Architect Series Aluminum Clad Awning with SunDefense Low-E Triple IG PEL-N-30 0.19–0.20 0.16–0.17 Wood and Clad Wood 50 NC, SC, S
Pella Architect Series Aluminum Clad Awning with NaturalSun Low-E Triple IG PEL-N-30 0.19–0.20 0.36–0.39 Wood and Clad Wood 50 N, NC
Pella Architect Series Aluminum Clad Large Awning with Advanced Low-E Triple IG PEL-N-30 0.19–0.20 0.21–0.23 Wood and Clad Wood 40 N, NC, SC, S
Pella Architect Series Aluminum Clad Large Awning with SunDefense Low-E Triple IG PEL-N-30 0.19–0.20 0.16–0.17 Wood and Clad Wood 40 NC, SC, S
Pella Architect Series Aluminum Clad Large Awning with NaturalSun Low-E Triple IG PEL-N-30 0.19–0.20 0.36–0.39 Wood and Clad Wood 40 N, NC
Pella Architect Series Wood Casement with Advanced Low-E Triple IG PEL-N-39 0.18–0.20 0.19–0.23 Wood and Clad Wood 50 N, NC, SC, S
Pella Architect Series Wood Casement with SunDefense Low-E Triple IG PEL-N-39 0.17–0.20 0.15–0.17 Wood and Clad Wood 50 NC, SC, S
Pella Architect Series Wood Casement with NaturalSun Low-E Triple IG PEL-N-39 0.18–0.20 0.32–0.39 Wood and Clad Wood 50 N, NC
Pella Architect Series Wood Awning with Advanced Low-E Triple IG PEL-N-40 0.18–0.20 0.19–0.23 Wood and Clad Wood 50 N, NC, SC, S
Pella Architect Series Wood Awning with Advanced Low-E Triple IG PEL-N-40 0.18–0.20 0.15–0.17 Wood and Clad Wood 50 NC, SC, S
Pella Architect Series Wood Awning with NaturalSun Low-E Triple IG PEL-N-40 0.18–0.20 0.32–0.39 Wood and Clad Wood 50 N, NC
Pella Architect Series Wood Large Awning with Advanced Low-E Triple IG PEL-N-40 0.18–0.20 0.19–0.23 Wood and Clad Wood 40 N, NC, SC, S
Pella Architect Series Wood Large Awning with SunDefense Low-E Triple IG PEL-N-40 0.18–0.20 0.15–0.17 Wood and Clad Wood 40 NC, SC, S
Pella Architect Series Wood Large Awning with NaturalSun Low-E Triple IG PEL-N-40 0.18–0.20 0.32–0.39 Wood and Clad Wood 40 N, NC
Pella Architect Series Wood Fixed Casement with Advanced Low-E Triple IG PEL-N-41 0.16–0.20 0.21–0.27 Wood and Clad Wood 30 N, NC, S, SC
Pella Architect Series Wood Fixed Casement with SunDefense Low-E Triple IG PEL-N-41 0.16–0.20 0.16–0.20 Wood and Clad Wood 30 N, NC, S, SC
Pella Architect Series Wood Fixed Casement with NaturalSun Low-E Triple IG PEL-N-41 0.16–0.20 0.35–0.45 Wood and Clad Wood 30 N, NC
Pella Lifestyle Series Triple-Pane Casement with AdvancedComfort IG PEL-N-245 0.20 0.20–0.22 Wood and Clad Wood 50 N, NC, SC, S
Pella Lifestyle Series Triple-Pane Awning with AdvancedComfort IG PEL-N-246 0.20 0.20–0.22 Wood and Clad Wood 50 N, NC, SC, S

Ply Gem Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Contractor 2000 PWG-M-173 0.15–0.20 0.13–0.23 Vinyl 70 N, NC, SC, S
Contractor 2000 PWG-M-174 0.15–0.20 0.13–0.23 Vinyl 70 N, NC, SC, S
East Pro/Premium/Premium EP Replacement PWG-M-25 0.15–0.20 0.13–0.24 Vinyl 70 N, NC, SC, S
East Pro/Premium/Premium EP Replacement PWG-M-26 0.15–0.20 0.13–0.25 Vinyl 70 N, NC, SC, S
Ecosmart/Pro/Premium/Uniframe Casement PWG-M-25 0.14–0.20 0.13–0.25 Vinyl 40 N, NC, SC, S
Ecosmart/Pro/Premium/Uniframe Awning PWG-M-26 0.14–0.20 0.13–0.25 Vinyl 45 N, NC, SC, S
Pro Series 700 Awning PWG-M-130 0.19–0.20 0.17–0.21 Vinyl 15 N, NC, SC, S
Pro Series 700 Casement PWG-M-131 0.19–0.20 0.17–0.21 Vinyl 15 N, NC, SC, S
West Pro Series 700 PWG-M-130 0.19–0.20 0.12–0.22 Vinyl 60 N, NC, SC, S
West Pro Series 700 PWG-M-131 0.18–0.20 0.12–0.22 Vinyl 50 N, NC, SC, S

Polaris Technologies
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
UltraWeld 8450 Casement Window POL-M-37 0.14–0.20 0.13–0.31 Vinyl 70 N, NC, SC, S
8460 Awning Window POL-M-38 0.14–0.20 0.13–0.31 Vinyl 40 N, NC, SC, S
7450 Casement Window POL-M-44 0.15–0.20 0.14–0.34 Vinyl 20 N, NC, SC, S
7460 Awning Window POL-M-45 0.15–0.20 0.14–0.34 Vinyl 30 N, NC, SC, S

ProVia Door, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Aeris Wood Clad Vinyl Casement Window PRD-K-64 0.16–0.20 0.16–0.23 Wood and Clad Wood 50 N, NC, SC, S
Aeris Wood Clad Vinyl Awning Window PRD-K-65 0.16–0.20 0.16–0.23 Wood and Clad Wood 50 N, NC, SC, S
Aspect/Endure 524/624 Vinyl Casement PRD-K-75 0.14–0.18 0.18–0.26 Vinyl 60 N, NC, SC, S
Aspect/Endure 531/631 Vinyl Awning PRD-K-76 0.15–0.18 0.18–0.26 Vinyl 60 N, NC, SC, S

Seaway Mfg. Corp.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Lighthouse/Commander SMA-A-21 0.16–0.20 0.18–0.22 Vinyl 45 N, NC, SC, S

Simonton Windows, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Reflections 5500/ PerfeXion Platinum/ Impressions 9800/6500 SBP-A-61 0.17–0.20 0.14–0.21 Vinyl 55 N, NC, SC, S
Reflections 5500/ PerfeXion Platinum/ Impressions 9800/6500 SBP-A-62 0.17–0.20 0.14–0.21 Vinyl 55 N, NC, SC, S

Slocomb Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
300 Series Casement SLC-K-6 0.16–0.20 0.14–0.23 Vinyl 25 N, NC, SC, S
300 Series Awning SLC-K-7 0.16–0.20 0.14–0.23 Vinyl 50 N, NC, SC, S

Soft-Lite LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Casement SLL-A-81 0.15–0.20 0.15–0.37 Vinyl 40 N, NC, SC, S
Awning SLL-A-82 0.15–0.20 0.15–0.37 Vinyl 40 N, NC, SC, S

Sunrise Windows, Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Sunrise/ Restorations/ Solace/ Vanguard/ V-Class/ Verde/ Season-Tech SUW-K-14 0.17–0.19 0.14–0.23 Vinyl 70 N, NC, SC, S
Sunrise/Restorations/Vanguard SUW-K-15 0.15–0.20 0.14–0.41 Vinyl 55 N, NC, SC, S

Thermo-Tech Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Classic Awning TTW-A-4 0.18–0.19 0.15–0.24 Vinyl 40 N, NC, SC, S
Classic Casement TTW-A-3 0.18–0.19 0.15–0.24 Vinyl 50 N, NC, SC, S
Northern Elevations Awning TTW-A-22 0.16-0.2 0.14-0.38 Vinyl 50 N, NC, SC, S
Northern Elevations Casement TTW-A-19 0.16-0.2 0.14-0.38 Vinyl 50 N, NC, SC, S

Thompson Creek Window Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
TC 900 TCW-K-13 0.18–0.19 0.21–0.23 Vinyl 50 N, NC, SC, S

Value Windows and Doors, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Eurotek 70 Dual Action Tilt and Turn VWS-A-48 0.17–0.18 0.12–0.16 Vinyl 60 S
GS-CM TRIPLE PANE VWS-A-20 0.19–0.20 0.14–0.21 Vinyl 30 S

Vector Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Envision Casement RRT-K-041 0.17 0.24–0.27 Vinyl 50 N, NC, SC, S
Envision Awning RRT-K-042 0.17 0.24–0.27 Vinyl 55 N, NC, SC, S

Vinyl Window Designs Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
100 Casement VID-N-1 0.18–0.19 0.21–0.23 Vinyl 70 N, NC, SC, S

Vinylmax LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Prestige Series VIM-M-15 0.16–0.20 0.16–0.23 Vinyl 50 N, NC, SC, S
Sherwood Series VIM-M-26 0.17–0.20 0.20–0.23 Wood and Clad Wood 50 N, NC, SC, S

Vista Window Company, LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Panorama Awning VWC-K-5 0.17–0.20 0.19–0.23 Vinyl 15 N, NC, SC, S
Panorama Casement Window VWC-K-4 0.17–0.20 0.19–0.23 Vinyl 50 N, NC, SC, S