Click the swap button to see how specs change between products. Watch the values morph and learn what needs to match.
ABC Windows Corp
Guardian Glass LLC
Choose a category to see common substitution scenarios
Every swap must pass these checks
Substitute must meet or exceed original positive and negative pressure ratings
Must have same or higher missile impact level for HVHZ compliance
New product must have current, unexpired NOA for Miami-Dade HVHZ
Verify NOA covers the specific sizes you need - larger sizes may have lower ratings
Installation must follow NOA-approved methods for the substitute product
Submit substitution request with both product specs for architect/engineer approval
Yes, but the substitute product must meet or exceed the original specifications. This includes design pressure ratings, impact resistance, and must have a valid NOA number. You may need updated wind load calculations if specs change significantly.
Key specs include: Design Pressure (positive and negative), Impact Rating (Large Missile Level), Wind Zone (HVHZ), Water Penetration resistance, Air Infiltration rating, and valid NOA number with current expiration date.
If the substitute product has different design pressure ratings or you are changing sizes significantly, you may need updated wind load calculations to verify the new product meets requirements. This is especially true if the new product has lower ratings.
The architect or engineer of record must approve substitutions. For significant changes, the building department may also need to review. Submit a formal substitution request with both product specifications for comparison.
Get wind load calculations to confirm your new product meets requirements.
Calculate Required Pressures