42"x 36" custom energy efficient aluminum folding up window

Upgrade your space with the Energy Efficient Folding Window. This 42"x 36" custom aluminum folding up window lifts the sash upward for a clean, space-saving opening. Designed for light-duty service areas, it helps bring in fresh air while keeping floor clearance open. Choose WHITE or BLACK to match your interior or exterior finishes. The aluminum frame supports everyday durability, and the smooth folding action reduces awkward swing space. Ideal for compact kitchens, counters, and pass-through openings, it offers practical access without clutter. For best performance, ensure proper sealing at installation and fold gently to help protect hinge life.