Product approval
Also called: Florida Product Approval, FL number, NOA, Notice of Acceptance, Miami-Dade approval, product approval number
A state or county certification that a specific window or door series passed the required impact, pressure and water tests, and the installation instructions it must be installed to. In Florida, an FL number or a Miami-Dade NOA. The permit and the inspection both run on it.
An impact window is only as good as its test results and its installation, so wind-zone codes require both to be documented and public. A manufacturer submits a window series to an approved lab for the large-missile, cyclic pressure, water and air tests; the results, the design pressures by size, and the installation instructions (anchor type, spacing, embedment, sealant, buck details) are filed with the state — Florida’s Product Approval system assigns an FL number — or with Miami-Dade County’s Product Control division, which issues a Notice of Acceptance (NOA) for the stricter High-Velocity Hurricane Zone. Other coastal states accept one or both, or run their own.
The number does three jobs. At permit, the building department checks that the product on the application is approved for the opening’s required design pressure. At installation, the approval’s instructions are the only correct method — a different screw or spacing is a failed inspection. At inspection, the inspector compares the anchors and the label on the frame to the document. Later, the wind-mitigation inspector and a buyer’s home inspector look for the same label and permit.
Every quote should list the approval number per product, and you can look each one up on the state or county site to confirm the series, the sizes it covers and the DP by size. A window sold without a number — online, at a liquidation sale, or by an installer who can’t produce it — can’t be permitted in a wind zone and shouldn’t be bought.