Check for licenses, insurance, and manufacturer certifications.

While DIY saves money, professional installation ensures the warranty remains valid. Get at least from local contractors.

Hinged at the side; great for maximum ventilation. Sliding: Operates horizontally; ideal for wide openings.

Look for the label and pay attention to these ratings: U-Factor: Measures heat loss (lower is better).

💡 Schedule your installation during the "off-season" (late fall or winter) to potentially score better discounts and faster service.

Your (for a single window or whole house). The climate you live in (extreme cold, coastal, or desert).