ENERGY STAR Most Efficient 2023 — Vertical Slider Windows

ENERGY STAR Most Efficient 2023 logoThe 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
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

A Window Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Energy Core Double Hung AWN-M-13 0.15–0.20 0.16–0.26 Vinyl 40 N, NC, SC, S

Andersen Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
A-Series Double Hung AND-N-91 0.20 0.13–0.26 Composite 50 N, NC, SC, S
Renewal By Andersen® Double Hung Window AND-N-184 0.20 0.19–0.29 Other 40 N, NC, SC, S

Associated Materials, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8E01/8001 ASO-A-71 0.17-0.20 0.14-0.29 Vinyl 15 N, NC, SC, S
Preservation - 9E01/9001 ASO-A-73 0.17-0.20 0.16-0.29 Vinyl 20 N, NC, SC, S
Mezzo - 3001  ASO-A-89 0.17-0.20 0.07-0.30 Vinyl 15 N, NC, SC, S
80 Series A581 ASO-A-103 0.16-0.20 0.07-0.32 Vinyl 45 N, NC, SC, S

Atrium Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8900/3900/625/25 Double Hung ADW-M-388 0.17–0.20 0.14–0.23 Vinyl 30 N, NC, SC, S

Champion Window
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Comfort 365 Extreme Energy CHW-A-7 0.20 0.21–0.25 Vinyl 30 N, NC, SC, S

Comfort Window Manufacturing
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Double Hung GAM-M-11 0.18–0.20 0.23–0.25 Vinyl 30 N, NC, SC, S

EnergyWall Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8520 Double Hung EWW-M-2 0.15–0.20 0.14–0.35 Vinyl 40 N, NC, SC, S
7020 Double Hung EWW-M-3 0.17–0.20 0.14–0.35 Vinyl 25 N, NC, SC, S
7420 Double Hung EWW-M-14 0.15–0.20 0.15–0.36 Vinyl 50 N, NC, SC, S

Gilkey Window Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Boreal 3390 DH GWD-M- 38 0.17–0.20 0.11–0.25 Vinyl 40 N, NC, SC, S

Great Lakes Window
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
HarborLight GLW-M-125 0.18–0.20 0.17–0.26 Vinyl 55 N, NC, SC, S
ComfortSmart GLW-M-126 0.15–0.20 0.15–0.27 Vinyl 45 N, NC, SC, S
ecoSmart GLW-M-129 0.14–0.20 0.14–0.25 Vinyl 50 N, NC, SC, S

Harvey Industries, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Tribute Double Hung HII-M-42 0.20 0.22–0.22 Vinyl 35 N, NC, SC, S

Ideal Window Manufacturing, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
UltraTite IAP-M-36 0.20 0.22–0.24 Vinyl 45 N, NC, SC, S
PerfectFit / Majestic / Lifescapes IAP-M-25 0.19–0.20 0.22–0.24 Vinyl 35 N, NC, SC, S

Interstate Window & Door Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
9800 DH (CompositWood®)/ 9900 DH (CompositWood®) IBM-K-24 0.16–0.20 0.19–0.22 Composite 50 N, NC, SC, S
9400 DH (Architectural Series) IBM-K-43 0.16–0.20 0.19–0.22 Composite 50 N, NC, SC, S
8800/440 DH IBM-K-49 0.16 0.21–0.23 Vinyl 55 N, NC, SC, S
6800 DH IBM-K-49 0.17–0.20 0.22–0.24 Vinyl 40 N, NC, SC, S

JELD-WEN, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Premium Vinyl (V-4500) Side Load Single Hung JEL-A-543 0.20 0.15–0.19 Vinyl 35 NC, SC, S
Premium Vinyl (V-4500) Double Hung JEL-A-774 0.19–0.20 0.14–0.25 Vinyl 50 N, NC, SC, S

Joyce Manufacturing Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Insulator INDH JMC-K-5 0.15–0.20 0.14–0.22 Vinyl 50 N,NC, SC, S

Kohltech International, Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Estate KOI-A-19 0.20 0.23 Vinyl 70 N, NC, SC, S
Heritage KOI-A-19 0.20 0.23 Vinyl 55 N, NC, SC, S
Supreme KOI-A-8 0.20 0.24 Vinyl 70 N, NC, SC, S
Supreme Single Hung KOI-A-87 0.18–0.20 0.21–0.62 Vinyl 65 N, NC, SC, S

Marvin Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Ultimate Wood Double Hung / Single Hung MAR-N-68 0.15–0.20 0.13–0.41 Wood and Clad Wood 40 N, NC, SC, S
Ultimate Wood Double Hung / Single Hung Round Top MAR-N-75 0.16–0.20 0.15–0.41 Wood and Clad Wood 30 N, NC, SC, S
Ultimate Wood Double Hung / Single Hung Magnum MAR-N-318 0.15–0.20 0.15–0.41 Wood and Clad Wood 50 N, NC, SC, S
Ultimate Wood Double Hung / Single Hung Insert MAR-N-364 0.16–0.20 0.16–0.42 Wood and Clad Wood 30 N, NC, SC, S
Ultimate Double Hung / Single Hung G2 MAR-N-425 0.17–0.20 0.15–0.37 Wood and Clad Wood 30 N, NC, SC, S

Mathews Brothers Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Sanford Hills Double Hung MBC-M-55 0.20 0.21–0.24 Vinyl 40 N, NC

Mercury-Excelum, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Harmony Series MEX-M-17 0.20 0.26 Vinyl 50 N, NC

MI Windows and Doors, LLC.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1650 PVC Double Hung Window MEI-A-216 0.16–0.20 0.08–0.44 Vinyl 30 N, NC, SC, S

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-14 0.16–0.20 0.21–0.24 Vinyl 30 N, NC, SC, S

NT Window, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
E,N,W,X,H,P110 NTW-A-13 0.20 0.17–0.19 Vinyl 35 NC, SC, S
E,N,W,X,H,P210 NTW-A-18 0.18 0.16–0.18 Vinyl 25 NC, SC, S
Y110 NTW-A-27 0.20 0.16–0.17 Vinyl 40 NC, SC, S
Y210 NTW-A-24 0.20 0.15–0.17 Vinyl 40 NC, SC, S

OKNA Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Insul Tec – 500 / 5500 Series OKW-K-18 0.15–0.19 0.23–0.26 Vinyl 50 N, NC
Precision Weld – 400 Series OKW-K-22 0.20 0.26 Vinyl 50 N, NC
Enviro Star – 800 Series OKW-K-23 0.16–0.20 0.23–0.25 Vinyl 60 N, NC, SC, S
Starmark – 900 Series OKW-K-32 0.15–0.20 0.22–0.24 Composite 45 N, NC, SC, S
Eco – Pro – 600 / 6600 OKW-K-37 0.16–0.20 0.23–0.26 Vinyl 50 N, NC, SC, S
HIMARK – 1000 OKW-K-41 0.15–0.18 0.22–0.25 Vinyl 55 N, NC, SC, S
Starmark – EVO – 7500 OKW-K-47 0.14–0.17 0.15–0.25 Composite 55 N, NC, SC, S

Pella Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
350 Series Single Hung (Nail Fin) PEL-N-191 0.17–0.20 0.22–0.24 Vinyl 60 N, NC, SC, S
350 Series Single Hung (Pocket Frame) PEL-N-198 0.17–0.20 0.22–0.24 Vinyl 40 N, NC, SC, S
350 Series Double Hung (Nail Fin) PEL-N-190 0.18–0.19 0.21–0.24 Vinyl 60 N, NC, SC, S
350 Series Double Hung (Pocket Frame) PEL-N-186 0.18–0.20 0.21–0.24 Vinyl 40 N, NC, SC, S
Pella 250 Series Single-Hung with Advanced Low-E PEL-N-208 0.20 0.22–0.25 Vinyl 50 N, NC, SC, S

Ply Gem Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1500 Vinyl Collection Beveled PWG-M-168 0.17–0.20 0.12–0.26 Vinyl 50 N, NC, SC, S
1500 Vinyl Collection Brickmould PWG-M-170 0.16–0.20 0.12–0.26 Vinyl 50 N, NC, SC, S
Contractor 2000 PWG-M-155 0.16–0.20 0.17–0.26 Vinyl 55 N, NC, SC, S
Contractor 2000 Double Hung PWG-M-155 0.19–0.20 0.13–0.29 Vinyl 15 N, NC, SC, S
East Premium/Premium EP Replacement PWG-M-28 0.16–0.20 0.14–0.25 Vinyl 50 N, NC, SC, S
Ecosmart/Uniframe Double Hung PWG-M-27 0.15–0.20 0.12–0.25 Vinyl 25 N, NC, SC, S
Ply Gem 1500 Single Hung PWG-M-168 0.17–0.20 0.13–0.25 Vinyl 20 N, NC, SC, S
Ply Gem 1500 Single Hung (Brickmould) PWG-M-170 0.17–0.20 0.13–0.25 Vinyl 20 N, NC, SC, S
Premium 1000 Double Hung PWG-M-31 0.16–0.20 0.15–0.27 Vinyl 15 N, NC, SC, S
Premium Replacement Double Hung PWG-M-29 0.17–0.20 0.15–0.27 Vinyl 35 N, NC, SC, S
Premium Replacement Double Hung (Energy Package) PWG-M-32 0.16–0.20 0.15–0.27 Vinyl 50 N, NC, SC, S
Pro Replacement Double Hung PWG-M-28 0.17–0.20 0.15–0.23 Vinyl 35 N, NC, SC, S
Pro Series 200 Single Hung PWG-M-122 0.19–0.20 0.20–0.24 Vinyl 20 N, NC, SC, S
West Pro Series 200 PWG-M-122 0.19–0.20 0.11–0.26 Vinyl 40 N, NC, SC, S

Polaris Technologies
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
7020 Double Hung POL-M-22 0.17–0.20 0.14–0.35 Vinyl 25 N, NC, SC, S
UltraWeld 8420 Double Hung POL-M-35 0.15–0.20 0.14–0.35 Vinyl 40 N, NC, SC, S
7420 Double Hung POL-M-42 0.15–0.20 0.15–0.36 Vinyl 50 N, NC, SC, S

ProVia Door, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Aeris Wood Clad Vinyl Double Hung PRD-K-63 0.16–0.20 0.17–0.25 Wood and Clad Wood 50 N, NC, SC, S
Aspect/Endure 501/601 Vinyl Double Hung PRD-K-73 0.16–0.19 0.18–0.27 Vinyl 50 N, NC, SC, S

Rosati Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Rosati Double Hung ROS-A-6 0.19–0.20 0.20–0.24 Vinyl 65 N, NC, SC, S

Seaway Mfg. Corp.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Encore-Elite/Signature-Gold SMA-A-26 0.16–0.20 0.23–0.26 Vinyl 55 N, NC, SC, S

Seven D Industries LP
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
7700/7800 Single Hung SED-A-42 0.18 0.25–0.27 Vinyl 50 N, NC
7700/7800 Double Hung SED-A-41 0.19 0.24–0.27 Vinyl 50 N, NC, SC, S

Simonton Windows, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Madeira/Window World 4000/America's Dream Window SBP-A-56 0.17–0.18 0.17–0.26 Vinyl 25 N, NC, SC, S
Madeira/Window World 4000/America's Dream Window SBP-A-55 0.18–0.19 0.16–0.25 Vinyl 30 N, NC, SC, S
Reflections 5500/ PerfeXion Platinum/ Impressions 9800/6500 SBP-A-44 0.18–0.20 0.16–0.24 Vinyl 55 N, NC, SC, S
Reflections 5500/ Prism Platinum/ Grand Estates Premier/ Grand Estates Premium Plus/ Impressions 9800/ Generations/ Grandura SBP-A-44 0.18–0.19 0.17–0.23 Vinyl 50 N, NC, SC, S

Slocomb Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
400/500 Series Double Hung SLC-K-2 0.15–0.20 0.14–0.24 Vinyl 35 N, NC, SC, S
200 Series Double Hung SLC-K-5 0.16–0.20 0.14–0.25 Vinyl 35 N, NC, SC, S

Soft-Lite LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Barrington SLL-A-13 0.18–0.20 0.18–0.27 Vinyl 55 N, NC, SC, S
Barrington SLL-A-10 0.18–0.20 0.18–0.27 Vinyl 60 N, NC, SC, S
Bainbridge SLL-A-9 0.17–0.20 0.18–0.27 Vinyl 40 N, NC, SC, S
Classic SLL-A-62 0.17–0.20 0.18–0.26 Vinyl 35 N, NC, SC, S
Pro SLL-A-64 0.17–0.20 0.17–0.26 Vinyl 35 N, NC, SC, S
Imperial LS SLL-A-29 0.17–0.20 0.15–0.24 Vinyl 55 N, NC, SC, S
Elements SLL-A-27 0.16–0.20 0.15–0.41 Vinyl 55 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 SUW-K-9 0.18–0.19 0.15–0.23 Vinyl 30 N, NC, SC, S
Sunrise/ Restorations/ Solace/ Vanguard/ V-Class/ Verde/ Season-Tech SUW-K-1 0.17–0.20 0.15–0.25 Vinyl 30 N, NC, SC, S

Thermo-Tech Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Northern Elevations Double Hung TTW-A-24 0.18-0.2 0.14-0.41 Vinyl 40 N, NC, SC, S
Northern Elevations Single Hung TTW-A-23 0.17-0.2 0.15-0.43 Vinyl 45 N, NC, SC, S

Thompson Creek Window Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
7900 Double Hung Window TCW-K-11 0.20 0.22-0.25 Vinyl 55 N, NC, SC, S

Value Windows and Doors, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
GS-SHT TRIPLE PANE VWS-A-38-00040-00001 0.19–0.20 0.16–0.18 Vinyl 35 S

Vector Windows
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Envision Single Hung RRT-K-044 0.17-0.18 0.25–0.28 Vinyl 45 N, NC, SC, S
Envision Double Hung RRT-K-046 0.18 0.24–0.27 Vinyl 40 N, NC, SC, S

Vinyl Window Designs Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
201 Single Hung VID-N-3 0.18 0.26 Vinyl 55 N, NC

Vinylmax LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
4600/4700/4800 Series VIM-M-46 0.16–0.20 0.16–0.27 Vinyl 45 N, NC, SC, S
Radiance Series VIM-M-21 0.16–0.20 0.18–0.27 Vinyl 45 N, NC, SC, S
Sherwood Series VIM-M-23 0.18–0.20 0.15–0.23 Wood and Clad Wood 40 N, NC, SC, S

Vista Window Company, LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Panorama Double Hung VWC-K-1 0.18–0.20 0.21–0.25 Vinyl 30 N, NC, SC, S

Vytex Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Fortis Series VYW-M-30 0.16–0.20 0.16–0.25 Vinyl 50 N, NC, SC, S
Potomac Series VYW-M-24 0.15–0.20 0.14–0.25 Vinyl 30 N, NC, SC, S

Winchester Industries
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Bristol 755 Double Hung WCI-K-6 0.18–0.20 0.15–0.23 Vinyl 50 N, NC, SC, S
Bristol Double Hung WCI-K-6 0.18–0.20 0.15–0.23 Vinyl 55 N, NC, SC, S

Window Mart Mfg. LLC.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1145 Double Hung WMI-K-15 0.18–0.20 0.09–0.20 Vinyl 45 N, NC, SC, S
2645/2745 Double Hung WMI-K-10 0.18–0.20 0.09–0.21 Vinyl 40 N, NC, SC, S
2945 Double Hung WMI-K-11 0.19–0.20 0.09–0.21 Vinyl 50 N, NC, SC, S
3145 Double Hung WMI-K-18 0.18–0.02 0.10–0.20 Vinyl 45 N, NC, SC, S