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High Performance ProductsEgress Specs

Alpen Zenith Series (ZR-X/X-25) Fiberglass Window Egress

Minimum WidthMinimum Height
Single Hung25.2592.539.558.5
Double Hung25.2595.2539.561.25
Slider (XO/OX)50.2545.2578.7528.25
Casement w/ Standard Hardware3145.545.2528.5
Casement w/ Egress Hardware2843.753633
AwningCannot be used for egress

An egress window must satisfy the following International Residential Code (IRC) criteria:

  1. Minimum width of opening: 20 inches
  2. Minimum height of opening: 24 inches
  3. Minimum net clear opening, ground floor: 5.0 sq ft
  4. Minimum net clear opening, all other floors: 5.75 sq ft
  5. Maximum latch height above floor: 54 inches
  6. Maximum sill height above floor: 44 inches

Local building codes may apply more stringent code requirements; please be certain to review those standards.