| 1 | Research manufacturers' experience in the industry. | Ensures reliability and expertise. | ISO 9001 certification. |
| 2 | Check for product warranties offered. | Protection against defects and issues. | Class A or B certification. |
| 3 | Evaluate energy efficiency ratings. | Conserves energy and reduces bills. | Energy Star certification. |
| 4 | Ask for customer references and reviews. | Provides insight into customer satisfaction. | AAMA certification. |
| 5 | Examine the range of products offered. | Ensures options for different needs. | NFRC labels for performance. |
| 6 | Inquire about custom design options. | Allows for personalized aesthetics. | Local building codes compliance. |
| 7 | Review installation options and expertise. | Ensures proper fit and performance. | Installer certifications such as AAMA. |
| 8 | Request information on material sources. | Assures quality and sustainability. | LEED certification for sustainable practices. |
| 9 | Investigate company support and service. | Critical for ongoing assistance. | Warranty compliance standards. |
| 10 | Verify compliance with local regulations. | Avoid legal issues and ensure safety. | Compliance with state and federal codes. |