Start with the project—not only the series name
A useful comparison begins with the number and type of openings, the condition of the existing frames, the desired window style and whether installation services are needed. Product availability can vary by style, dimensions and current manufacturer offerings.
| Question | OKNA 400 Series | OKNA 500 Series |
|---|---|---|
| Who may consider it? | Buyers seeking a dependable, straightforward replacement-window line for common configurations. | Buyers who want to compare an additional OKNA line and its available design and performance choices. |
| Styles to discuss | Double-hung, slider, picture, casement, awning and selected specialty configurations, subject to availability. | Ask which operating styles and sizes are available for the specific openings in your project. |
| Options that affect the quote | Window size and style, glass package, grids, colors, screens, hardware, quantity and installation scope. | |
| Best next step | Provide an opening count, preliminary measurements, photographs and the project town. Final order dimensions must be verified before manufacturing. | |
Compare the complete window configuration
A series name alone does not describe the final product. Ask what glass package is included, whether double- or triple-pane configurations are available, which Low-E and gas-fill options apply, and how grids, colors, screens and hardware affect price and timing.
Include installation scope in the comparison
Product-only pickup and professional installation are different project scopes. When comparing proposals, confirm who verifies final measurements, what removal and trim work are included, how delivery is handled and what conditions could change the installation price. Window Sales LLC coordinates delivery when installation services are included.
Questions worth asking before ordering
- Which series and window style fit each opening?
- What glass, grid, color, screen and hardware selections are included?
- Are custom sizes required?
- What is the current estimated order timing?
- Is the proposal product-only, pickup, or product with installation services?
- Who will verify final ordering dimensions?