HVHZ Buyer's Guide: Which Panda Systems Are Hurricane-Rated and Why It Matters

If you're building in Miami-Dade or Broward County, this isn't a preference — it's a permit requirement.

Most of the conversation around hurricane windows and doors focuses on the glass. Impact glass, laminated glass, missile-rated glass. That's a reasonable starting point — but for homeowners and builders working in Florida's High Velocity Hurricane Zone, the glass specification is only part of the picture. The system holding the glass has to be certified too.

HVHZ — High Velocity Hurricane Zone — is the designation applied to Miami-Dade and Broward Counties under the Florida Building Code. It represents the most stringent residential and commercial building standard in the United States, developed in the aftermath of Hurricane Andrew's 1992 devastation. In an HVHZ, only products with a valid Notice of Acceptance (NOA) or approved equivalent — earned through third-party testing to TAS standards — can be legally permitted. A product that is 'hurricane rated' in a general sense, or carries AAMA or NFRC certification, does not automatically meet HVHZ requirements.

This guide covers what HVHZ certification actually means, which Panda systems carry it, and how to match the right system to your project.

What HVHZ Actually Means — and Why It's Different From 'Impact Rated'

The terms 'impact rated', 'hurricane rated', and 'HVHZ approved' are frequently used interchangeably in marketing. They are not the same thing.

• Impact rated — means the product has been tested to resist impact, typically using an ASTM standard. This is a meaningful rating for wind-borne debris zones outside the HVHZ but is not sufficient on its own for HVHZ permitting.
• Hurricane rated — a general-use marketing term with no single standardized definition. A product can call itself 'hurricane rated' based on almost any level of testing. Treat this phrase with skepticism without a specific test standard attached to it.
• HVHZ approved — specifically means the product has passed Florida's TAS 201, TAS 202, and TAS 203 test protocols and carries either a Miami-Dade NOA or an equivalent approval that is valid in the HVHZ. This is the only designation that means anything for permitting in Miami-Dade or Broward County.

The three TAS tests — what each one actually does

Every HVHZ-approved product has passed all three of the following tests, administered by an independent third-party laboratory:

Why TAS 203 matters more than most buyers realize: A single structural pressure test (like ASTM E1886) tells you a system can handle a one-time peak load. TAS 203's 9,000+ cyclic pressure cycles tell you the system can handle hours of sustained, alternating gust pressure — which is what a real hurricane actually delivers. A system that passes TAS 203 has been proven not to fatigue, deform, or develop seal failures under conditions that approximate the real duration of a major storm event.

Florida's Three-Tier HVHZ Approval System

Not all hurricane product approvals are valid in all locations. Florida operates a three-tier system — and knowing which tier your project requires is critical before specifying any product:

The critical distinction: A Florida Product Approval (FL-xxxx) is sufficient for most of the state — but it is explicitly not valid in Miami-Dade or Broward County. Builders who specify FL-approved products for HVHZ projects will fail permitting. Only Miami-Dade NOA (Tier 1) or Broward County BC (Tier 2, Broward only) products are acceptable in the HVHZ. Panda's HVHZ-approved systems carry Tier 1 Miami-Dade NOA approval — valid statewide across all of Florida.

Panda's HVHZ-Approved Systems — The Complete Lineup

Panda currently offers six HVHZ-approved product categories, spanning large sliding doors, multi-slide systems, entry pivot doors, and architectural windows. All carry Miami-Dade NOA approval — valid statewide — and all are third-party tested to TAS 201, TAS 202, and TAS 203. Here's what each system is and what it's designed to do:

On the IS.14: Panda is the only manufacturer in the industry with the ability to produce large-format Lift & Slide panels — up to 5' × 12' per panel — that carry HVHZ approval with a 100 psf structural load rating. For coastal homes that require both expansive glass walls and full HVHZ code compliance, the IS.14 is the only system in the market that achieves both simultaneously at this panel scale.

Where HVHZ Approval Is Required — and Where It's Just Smart

HVHZ compliance is legally required only in Miami-Dade and Broward Counties. But the value of TAS-tested systems extends well beyond those two counties — and many architects and homeowners in adjacent markets specify HVHZ-approved products precisely because the testing standard is the most rigorous available anywhere in the US.

What to Ask When Specifying an HVHZ Product

Not every product marketed as 'hurricane rated' or 'impact resistant' meets HVHZ requirements. When evaluating any system for an HVHZ project, confirm the following:

• Does it carry a Miami-Dade Notice of Acceptance (NOA)? Ask for the NOA number. Verify it directly in Miami-Dade's Product Control database at miamidade.gov/building. Active NOAs are listed publicly and include the specific sizes and configurations covered.
• Has it been tested to TAS 201, TAS 202, and TAS 203? All three must be passed — not just one or two. Ask for the third-party test report, not just the manufacturer's claim.
• Is the NOA current? HVHZ approvals expire annually. A manufacturer must renew approval, pass factory inspections, and maintain a continuous QA program. An expired NOA cannot be used to permit a new installation.
• Does the approved size cover your opening? NOAs list approved configurations by maximum panel dimensions, design pressure ranges, and anchorage details. A system that is HVHZ approved in one size may not carry approval for the larger dimensions your project requires. Verify that your specific opening falls within the tested and approved envelope.
• Is the glazing within the approval? The glass type and thickness is specified as part of the NOA. Substituting glass outside the approved specification — even with a nominally equivalent product — can invalidate the approval for permitting purposes.

Panda's approach: All Panda HVHZ products ship with documentation that includes the NOA number and the tested size configurations. Panda's technical team can confirm whether your specific project dimensions fall within an active approval, and can advise on the appropriate product if the opening exceeds standard tested sizes. Contact Panda's team directly at (888) 246-1651 before finalising your specification.

HVHZ Approval Beyond Florida — Why It Matters Nationally

The HVHZ certification is a Florida code requirement, but its reach as a quality standard extends well beyond the state. Several reasons architects and builders in other high-wind markets specify TAS-tested products:

• It's the most rigorous publicly available test standard. TAS 201/202/203 is more demanding than ASTM standards used in the rest of the country. Specifying to TAS gives a measurable margin above what code requires in most wind zones.
• The cyclic load requirement has no equivalent in ASTM testing. TAS 203's 9,000-cycle requirement is unique to the HVHZ protocol. Products that pass it have demonstrated fatigue resistance that ASTM-only products have not been required to prove.
• Insurance underwriters increasingly recognise it. In high-risk coastal markets across the Gulf Coast and Atlantic Seaboard, insurance carriers are beginning to offer premium reductions for homes with verified HVHZ-compliant fenestration — in some cases regardless of whether HVHZ compliance is legally required.
• It provides a clear, verifiable specification baseline. The NOA number is publicly searchable and independently verifiable. For architects and project managers specifying performance requirements, it provides a single, unambiguous benchmark that 'hurricane rated' marketing language does not.

Specifying for the HVHZ? Start Here.

Panda's HVHZ product line covers large sliding doors, multi-slide systems, entry pivot doors, and architectural windows — all carrying Miami-Dade NOA approval and tested to TAS 201, 202, and 203. The collection is growing, and Panda's engineering team can advise on whether your specific project dimensions and configurations are covered by an active approval before you finalise your specification.

For projects that combine HVHZ code compliance with high design ambition — large glass walls, luxury entry doors, contemporary profiles — Panda's IS.14, X0 Slim-Line, and Voyage Collection are the systems that deliver both without compromise. No other manufacturer offers a large-format Lift & Slide system with HVHZ approval at the panel dimensions the IS.14 supports.

View HVHZ-Approved Systems

panda-windows.com/impact-rated-hvhz

Get a Free Project Quote

panda-windows.com/contact | (888) 246-1651

Frequently Asked Questions

What counties in Florida are in the HVHZ?

The High Velocity Hurricane Zone (HVHZ) currently covers Miami-Dade and Broward Counties. These are the two counties where only TAS 201/202/203-tested products with a valid Miami-Dade NOA or Broward County BC approval can be legally permitted for glazed openings.

What is a Miami-Dade Notice of Acceptance (NOA)?

An NOA is the formal product approval issued by Miami-Dade County Product Control after a product passes HVHZ testing. It specifies the exact sizes, configurations, glazing types, and anchorage details that are approved for use. NOAs expire annually and must be renewed by the manufacturer. They are publicly searchable in Miami-Dade's Product Control database.

Is a Florida Product Approval (FL-xxxx) sufficient for HVHZ projects?

No. Florida Product Approvals are valid only in non-HVHZ areas of Florida. They are explicitly not accepted in Miami-Dade or Broward County. A project in the HVHZ that specifies FL-approved products will fail permitting.

How does HVHZ approval differ from standard impact rating?

Standard impact ratings (typically ASTM E1996/E1886) are a baseline for wind-borne debris resistance. HVHZ approval goes significantly further — requiring missile impact testing (TAS 201), structural and water infiltration testing (TAS 202), and 9,000+ cyclic pressure cycles (TAS 203). The cyclic load requirement is unique to the TAS protocol and has no equivalent in ASTM standards. It proves the system can withstand sustained, alternating wind pressure over the full duration of a hurricane event.

Which Panda system is the right choice for a beachfront home in Miami-Dade?

For large sliding glass wall applications, the IS.14 Lift & Slide is the strongest specification — it is the only large-format HVHZ-approved Lift & Slide system available at panel scales of 5' × 12', with a 100 psf structural load rating. For the entry door, the Voyage Collection pivot door is HVHZ approved and scales up to 24' in height. For windows, the TS.67 series matches the Voyage Collection profile and is also HVHZ approved. For a multi-slide door application, the TS.X0 or Tavi.X0 provide the slimmest sightlines in the industry with full HVHZ approval.

Do Panda's HVHZ systems require special maintenance?

The maintenance requirements for Panda's HVHZ systems are the same as for the standard versions — fresh water rinsing every one to three months in coastal environments, annual silicone-based lubrication of moving components, and periodic inspection of gaskets and weatherstripping. The 304-grade stainless steel hardware, Kynar-coated lock faces, and Delrin polymer rollers used across the HVHZ product line are specified for coastal durability without elevated maintenance requirements.

Panda Windows & Doors | panda-windows.com | (888) 246-1651 | N. Las Vegas, NV 89030