EC147 Casement Window

The EnergyCore 147 casement window combines traditional style with unparalleled energy efficiency and performance for any new construction or renovation and replacement project. The unique frame and sash design create clean, continuous lines and large viewing areas, while the 90-degree hinging capability allows optimal ventilation and airflow into the home.

ENERGY STAR-qualified in all four U.S. climate zones, the EC147 vinyl casement window is one of MI Windows and Doors most energy efficient windows. With features like a warm-edge spacer system and exterior perimeter weatherstripping, the EC147 vinyl casement window is ideal for projects that demand high performance while not sacrificing curb appeal or ventilation. 

Energy Star ®


  • North-Central
  • Northern
  • South-Central
  • Southern
  • Warm-edge spacer system maximizes energy efficiency and improves seal performance of insulated glass units
  • Welded, multi-chambered frame and sash for superior strength and energy-efficiency
  • Exterior perimeter weatherstripping for enhanced thermal performance
  • Dual-compression bulb seals for protection against wind, rain, dust, and noise
Product Details:
  • 3-1/4" frame depth
  • 3/4" dual-pane insulated glass
  • 5 frame styles
    • 1-3/8" fin, 1-3/8" stucco fin, 1" fin, 1-7/8" flush fin, finless
Performance Ratings:
  • STC: 30-41
  • U-Value: 0.19-0.31
  • SHGC: 0.11-0.24
  • VLT: 0.22-0.44
Glass Options:
  • Tempered
  • Obscure
  • Laminated
  • Argon Gas Enhancement
  • LoE-340
  • LoE-366
  • i89 LoE

Color Options:
  • White (interior and exterior)
  • Adobe (interior and exterior)
  • Bronze  (exterior with white or adobe interior)
Grid Options:
  • 5/8" flat grids-between-the-glass
  • 15/16" sculptured grids-between-the-glass
  • 5/8" simulated divided light
  • 15/16" simulated divided light
  • Color match

*Product availability varies by state and region. 
Consult your local building code for product approvals pertaining to your specific project.  Please contact MI for assistance.