Okna Window Cost Calculator
$$$Engineered for Performance. Built in Pennsylvania.
Updated September 2026
Okna is a family-owned manufacturer from Bristol, Pennsylvania, beloved by window enthusiasts for best-in-class air infiltration numbers. The 800 series (also sold as HiMark 800) posts a remarkable 0.02 air infiltration rating — among the tightest vinyl windows you can buy.
Quick Answer
Okna windows cost $800 to $1,300 per window fully installed in 2026, averaging around $1,000. The 500 Insul-Tec ($800–$1,000) is the value pick, the 600 EcoPro ($900–$1,150) is the balanced middle, and the flagship 800 series ($950–$1,300, also sold as HiMark 800) delivers a best-in-class 0.02 air infiltration rating. Okna sells through authorized dealers only.
Starting Price
$800
Premium Price
$1,300
*Per window, including installation
Cost Calculator
Get instant estimates
Estimated Total Cost
$2,250 - $4,250
$450 - $850 per window
Product Lines
500 Insul-Tec
Entry/mid vinyl — the value sweet spot
$800-1,000
per window
600 EcoPro
Newer design, near-800 performance
$900-1,150
per window
800 (HiMark 800)Premium
Flagship vinyl, 0.02 air infiltration rating
$950-1,300
per window
Strengths
- Best-in-class air infiltration (0.02 on 800 series)
- Excellent build quality and foam-filled frames
- Deluxe package adds locking screens and upgraded glass
- Strong reputation among window professionals
- Good value vs performance ratio
Considerations
- •Dealer-only sales — limited availability by region
- •Less national brand recognition than Andersen/Pella
- •Fewer style and color options than big brands
- •Premium pricing over budget vinyl
Warranty Information
Lifetime limited warranty on windows and parts for the original owner
Okna Windows vs Competitors
| Brand / Series | Installed Price | Quality | Warranty |
|---|---|---|---|
| Okna 800 | $950–$1,300 | 0.02 AI rating, elite vinyl | Lifetime limited |
| ProVia Endure | $1,000–$1,250 | 0.05 AI rating, top-10 vinyl | Lifetime + glass breakage |
| Soft-Lite Elements | $950–$1,250 | Premium vinyl, strong ratings | Lifetime limited |
| Sunrise Vanguard | $900–$1,200 | Good vinyl, slim frames | Lifetime limited |
Also compare Andersen window costs and Pella window prices before deciding.