ENERGY STAR Most Efficient 2023 — Horizontal 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, 68 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

A Window Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Energy Core AWN-M-14 0.15–0.20 0.17–0.26 Vinyl 40 N, NC, SC, S

Andersen Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Renewal By Andersen® Gliding Window AND-N-146 0.19–0.20 0.18–0.28 Other 40 N, NC, SC, S

Associated Materials, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
8002/ 8003/ 8009/ 9002/ 9003/ 9009/ 0502/ 0503/ 0509/ 0602/ 0603/ 0609 ASO-A-43 0.19–0.20 0.23–0.27 Vinyl 25 N, NC, SC, S
Mezzo - 03A2 ASO-A-93 0.16–0.20 0.07–0.35 Vinyl N, NC, SC, S
Mezzo - 3002/3003/3009 ASO-A-90 0.17–0.20 0.07–0.31 Vinyl N, NC, SC, S
Preservation - 9002/9E02/9003/9E03/9009/9E09/8000 Series ASO-A-94 0.17–0.20 0.13–0.40 Vinyl N, NC, SC, S

Champion Window
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Comfort 365 Extreme Energy CHW-A-8 0.20 0.25 Vinyl 25 N, NC, SC, S

EnergyWall Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
7030 Slider EWW-M-4 0.17–0.20 0.14–0.33 Vinyl 15 N, NC, SC, S
8530 Slider EWW-M-5 0.16–0.20 0.13–0.30 Vinyl 45 N, NC, SC, S
7420 Slider EWW-M-15 0.16–0.20 0.14–0.34 Vinyl 35 N, NC, SC, S

Gilkey Window Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Boreal 3310 Lift Out Slider GWD-M- 39 0.17–0.20 0.11–0.26 Vinyl 50 N, NC, SC, S

Great Lakes Window
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
HarborLight GLW-M-124 0.18–0.20 0.17–0.26 Vinyl 50 N, NC, SC, S
ComfortSmart GLW-M-127 0.16–0.20 0.16–0.21 Vinyl 55 N, NC, SC, S
ecoSmart GLW-M-130 0.15–0.20 0.15–0.25 Vinyl 45 N, NC, SC, S

Ideal Window Manufacturing, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
UltraTite IAP-M-38 0.20 0.21–0.24 Vinyl 25 N, NC, SC, S
PerfectFit / Majestic / Lifescapes IAP-M-24 0.18–0.20 0.22–0.24 Vinyl 25 N, NC, SC, S
PerfectFit / Majestic / Lifescapes IAP-M-27 0.20 0.24 Vinyl 30 N, NC, SC, S

Interstate Window & Door Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
9800 HS (CompositWood®) IBM-K-45 0.15–0.20 0.17–0.23 Composite 40 N, NC, SC, S
9400 HS (Architectural Series) IBM-K-47 0.15–0.20 0.20–0.24 Composite 25 N, NC, SC, S
8800/6800/440 HS IBM-K-52 0.17 0.21–0.23 Vinyl 15 N, NC, SC, S

JELD-WEN, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Premium Vinyl (V-4500) Horizontal Slider JEL-A-544 0.20–0.20 0.15–0.19 Vinyl 35 NC, SC, S
Premium Vinyl (V-4500) Double Slider JEL-A-773 0.19–0.20 0.14–0.25 Vinyl 35 N, NC, SC, S

Joyce Manufacturing Co.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Insulator INSL JMC-K-6 0.16–0.20 0.14–0.24 Vinyl 35 N, NC, SC, S

Katerra Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
2101 Horizontal Slider KAT-A-4 0.18–0.20 0.17–0.27 Vinyl 50 N, NC, SC, S

Kensington HPP, Inc.
Product Line CPD Number U-Factor SHGC Vinyl PG Climate Zones
Huntington Slider KHI-M-17 0.18–0.20 0.15–0.40 Vinyl 50 N, NC, SC, S
Quantum Slider KHI-M-21 0.18–0.20 0.14–0.39 Vinyl 55 N, NC, SC, S

Kohltech International, Ltd.
Product Line CPD Number U-Factor SHGC Vinyl PG Climate Zones
Supreme KOI-A-51 0.20–0.20 0.24–0.24 Vinyl 40 N, NC, SC, S
Supreme Single Glider KOI-A-86 0.18–0.20 0.21–0.62 Vinyl 55 N, NC, SC, S

Marvin Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Ultimate Glider MAR-N-387 0.18–0.20 0.16–0.42 Wood and Clad Wood 35 N, NC, SC, S

Mathews Brothers Company
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Clara Starrett MBC-M-48 0.19 0.22–0.25 Vinyl 40 N, NC, SC, S

Mercury-Excelum, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Harmony Series MEX-M-18 0.20 0.26 Vinyl 40 N, NC

MI Windows and Doors, LLC.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1685 PVC Horizontal Slider (XX) Window MEI-A-215 0.17–0.20 0.08–0.44 Vinyl 15 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-15 0.16–0.20 0.21–0.24 Vinyl 20 N, NC, SC, S

NT Window, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
E,N,W,X,H,P140 NTW-A-14 0.18 0.18 Vinyl 30 NC, SC, S
Y140 NTW-A-22 0.20 0.16–0.18 Vinyl 35 NC, SC, S

OKNA Windows & Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Insul Tec – 520 / 5520 Series OKW-K-21 0.16–0.20 0.23–0.26 Vinyl 40 N, NC
Precision Weld – 420 Series OKW-K-24 0.17 0.25 Vinyl 35 N, NC, SC, S
Enviro Star - 820 Series OKW-K-30 0.20 0.25 Vinyl 50 N, NC, SC, S
Starmark - 920 Series OKW-K-33 0.15–0.20 0.22–0.25 Composite 40 N, NC, SC, S
Eco-Pro - 620/6620 OKW-K-39 0.17–0.20 0.22–0.25 Vinyl 40 N, NC, SC, S
HIMARK - 1020 OKW-K-40 0.16–0.18 0.20–0.23 Vinyl 60 N, NC, SC, S
Starmark - EVO - 7520 OKW-K-46 0.15–0.18 0.15–0.25 Composite 60 N, NC, SC, S

Pella Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
350 Series Sliding Window (Nail Fin) PEL-N-192 0.18–0.19 0.22–0.24 Vinyl 40 N, NC, SC, S
350 Series Sliding Window (Pocket Frame) PEL-N-201 0.18–0.20 0.22–0.24 Vinyl 40 N, NC, SC, S
Pella 250 Series Sliding Window with Advanced Low-E PEL-N-210 0.20 0.22–0.25 Vinyl 25 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-169 0.19–0.20 0.12–0.25 Vinyl 50 N, NC, SC, S
1500 Vinyl Collection Brickmould PWG-M-171 0.19–0.20 0.12–0.25 Vinyl 50 N, NC, SC, S
Contractor 2000 PWG-M-157 0.17–0.20 0.17–0.26 Vinyl 50 N, NC, SC, S
Contractor 2000 Horizontal Slider PWG-M-157 0.20–0.20 0.21–0.21 Vinyl 15 N, NC, SC, S
East Premium/Premium EP Replacement PWG-M-35 0.16–0.20 0.14–0.25 Vinyl 40 N, NC, SC, S
Ecosmart/Uniframe Horizontal Slider PWG-M-33 0.15–0.20 0.13–0.26 Vinyl 15 N, NC, SC, S
Ply Gem 1500 Horizontal Slider PWG-M-169 0.18–0.20 0.12–0.24 Vinyl 15 N, NC, SC, S
Premium 1000 Horizontal Slider PWG-M-35 0.16–0.20 0.15–0.28 Vinyl 15 N, NC, SC, S
Premium Replacement Horizontal Slider (Energy Package) PWG-M-37 0.16–0.20 0.15–0.27 Vinyl 45 N, NC, SC, S
Premium Replacement Horizontal Slider PWG-M-38 0.17–0.20 0.15–0.27 Vinyl 30 N, NC, SC, S
Pro Replacement Horizontal Slider PWG-M-36 0.18–0.20 0.15–0.23 Vinyl 30 N, NC, SC, S
Pro Series 200 Horizontal Slider PWG-M-121 0.19–0.20 0.20–0.24 Vinyl 15 N, NC, SC, S
West Pro Series 200 PWG-M-121 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
7030 Slider POL-M-21 0.17–0.20 0.14–0.33 Vinyl 15 N, NC, SC, S
UltraWeld 8430 Slider POL-M-36 0.16–0.20 0.13–0.30 Vinyl 45 N, NC, SC, S
7430 Slider POL-M-43 0.16–0.20 0.14–0.34 Vinyl 35 N, NC, SC, S

ProVia Door, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Aeris Wood Clad Vinyl Slider PRD-K-62 0.17–0.18 0.17–0.24 Wood and Clad Wood 50 N, NC, SC, S
Aspect/Endure 502/602 Vinyl Slider PRD-K-74 0.16–0.19 0.18–0.26 Vinyl 30 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-27 0.16–0.20 0.22–0.25 Vinyl 55/35 N, NC, SC, S

Seven D Industries LP
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
7700/7800 Horizontal Slider SED-A-43 0.17–0.18 0.25–0.28 Vinyl 30 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-59 0.18–0.20 0.16–0.24 Vinyl 25 N, NC, SC, S
Madeira/Window World 4000/America's Dream Window SBP-A-58 0.17–0.20 0.17–0.26 Vinyl 25 N, NC, SC, S
Reflections 5500/ PerfeXion Platinum/ Impressions 9800/6500 SBP-A-41 0.19–0.20 0.15–0.24 Vinyl 55 N, NC, SC, S
Reflections 5500/ Prism Platinum/ Grand Estates Premier/ Grand Estates Premium Plus/ Impressions 9800/ Generations/ Grandura SBP-A-41 0.18–0.19 0.17–0.22 Vinyl 20 N, NC, SC, S

Soft-Lite LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Barrington SLL-A-12 0.18–0.20 0.18–0.27 Vinyl 40 N, NC, SC, S
Barrington SLL-A-46 0.18–0.20 0.18–0.27 Vinyl 40 N, NC, SC, S
Bainbridge SLL-A-36 0.17–0.19 0.18–0.27 Vinyl 40 N, NC, SC, S
Classic SLL-A-60 0.17–0.20 0.17–0.26 Vinyl 35 N, NC, SC, S
Pro SLL-A-61 0.17–0.20 0.17–0.26 Vinyl 35 N, NC, SC, S
Imperial LS SLL-A-30 0.17–0.20 0.15–0.24 Vinyl 55 N, NC, SC, S
Elements SLL-A-28 0.16–0.20 0.15–0.24 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/ Season-Tech SUW-K-2 0.17–0.19 0.15–0.25 Vinyl 35 N, NC, SC, S
Sunrise/ Restorations/ Solace/ Vanguard/ V-Class/ Verde/ Season-Tech SUW-K-6 0.17–0.19 0.15–0.25 Vinyl 25 N, NC, SC, S

Thermo-Tech Windows and Doors
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Northern Elevations Slider TTW-A-25 0.17-0.2 0.15-0.44 Vinyl 45 N, NC, SC, S

Value Windows and Doors, Inc.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
GS-XO TRIPLE PANE VWS-A-42-00040-00001 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 Glider RRT-K-045 0.17-0.18 0.25–0.28 Vinyl 50 N, NC, SC, S
Envision Double Glider RRT-K-047 0.18-0.19 0.24–0.26 Vinyl 25 N, NC, SC, S

Vinyl Window Designs Ltd.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
303 Single Slider Lift-Out/Lift-Out End Vent VID-N-18 0.18 0.26 Vinyl 50 N, NC

Vinylmax LLC
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
4600/4700/4800 Series VIM-M-47 0.15–0.20 0.16–0.27 Vinyl 25 N, NC, SC, S
Radiance Series VIM-M-20 0.16–0.20 0.18–0.26 Vinyl 35 N, NC, SC, S
Sherwood Series VIM-M-24 0.18–0.20 0.15–0.23 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 Horizontal Slider VWC-K-2 0.17–0.19 0.22–0.26 Vinyl 30 N, NC, SC, S
Panorama Tilt-N-Slide VWC-K-16 0.19–0.20 0.20–0.24 Vinyl 15 N, NC, SC, S

Vytex Corporation
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
Fortis Series VYW-M-29 0.16–0.20 0.16–0.25 Vinyl 50 N, NC, SC, S
Potomac Series VYW-M-27 0.16–0.20 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 558 S-N-S Slider WCI-K-7 0.18–0.20 0.15–0.23 Vinyl 30 N, NC, SC, S
Bristol SNS Slider WCI-K-7 0.18–0.20 0.15–0.23 Vinyl 30 N, NC, SC, S

Window Mart Mfg. LLC.
Product Line CPD Number U-Factor SHGC Frame Type PG Climate Zones
1045 Double Slider WMI-K-14 0.18–0.20 0.09–0.21 Vinyl 30 N, NC, SC, S
2545 Double Slider WMI-K-9 0.18–0.20 0.09–0.21 Vinyl 25 N, NC, SC, S
3545 Double Slider WMI-K-19 0.17–0.20 0.11–0.23 Vinyl 25 N, NC, SC, S