NFRC Certified Fenestration Product Database

The National Fenestration Rating Council runs the certification program behind the energy-performance labels on virtually every window, door, and skylight sold in North America. Its Certified Products Directory is the ledger of that program: 741 manufacturers across 14 product types — awning, casement, picture, sliding, single-hung, double-hung and specialty windows, garage doors, glazed wall systems, sidelites, transoms, skylights, sliding glass doors, swinging exterior doors, and sloped glazing systems — with each certified glazing variant carrying measured U-factor, Solar Heat Gain Coefficient, visible transmittance, condensation resistance and air leakage values.

In Datadory's catalog of 1,744 datasets across 159 viable industries, this record scores 7/10 for quality and sits among 24 cataloged building-products datasets. It is the performance layer of that set: product catalogs tell you who sells a window, evaluation reports tell you whether it passes code, and this tells you precisely how the assembled unit performs thermally.

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Captured during the August 2026 review, from one casement product line — Acadia Windows and Doors' "700 Casement", CPD number AWD-M-21:

CPD #                 U-factor  SHGC   VT    CR   Glazing make-up
AWD-M-21-00081-00001  0.27      0.27   0.49  64   Vinyl/Vinyl, Fill 1: ARG(95/5), LowE, CL, No Grid
AWD-M-21-00082-00001  0.28      0.25   0.45  64   Vinyl/Vinyl, Fill 1: ARG(95/5), LowE, CL, Grid
AWD-M-21-00085-00001  0.28      0.27   0.49  62   (same line, thicker glass pack)

Three rows, and the shape of the whole dataset is already visible. Each variant differs from its siblings by exactly one specification decision — decorative grids added, glass pack thickened from DS/DS to 5mm/5mm — and each of those decisions moves the numbers: adding grids trims 0.04 of visible transmittance, the thicker insulated glass unit buys condensation resistance back down to 62.

Every row also carries a manufacturer product code spelling out the glazing recipe in order — 70/36 / arg / clr (DS/DS) 3/4" IG reads as glass thicknesses, argon fill, clear coating position, and a three-quarter-inch insulated glass unit. That code is the join key between marketing SKUs and certified physics.

Thirteen fields, verified against live rows during review — the identity block (CPD number, manufacturer, series name, operator type), the five measured ratings, and three descriptive attributes (glazing make-up, frame type, gas fill):

• CPD Number — the certified identifier, anatomical in format: AWD-M-21-00081-00001 decomposes into maker, product type, line and variant, so a single string locates a configuration inside a manufacturer's catalog.
• Operator Type — the mechanism code (CSSV on the sampled casements); sash-type codes such as AN/AS/AT/AU/VC/CO/CF/FG/WF/WM distinguish fixed from operable units.
• U-factor, SHGC, VT — the thermal trio, each bounded and comparable across every manufacturer in the directory because one certification procedure produced them.
• Condensation Resistance — an integer index where higher resists interior condensation; the sampled line ran 62 to 64 across variants.
• Glazing make-up — free text encoding frame finish, cavity gas, coating and grid decisions (Vinyl/Vinyl, Fill 1: ARG(95/5), LowE, CL, No Grid).

Two sparser fields — air leakage and the optional ventilation rating for standard screens — are folded under additional fields on request rather than promised in the base dictionary. Ask for them with your sample and they arrive joined.

Coverage runs narrow in dimension, deep in rows:

• Geography: North America — United States and Canada certifications, the labeling regime behind ENERGY STAR qualification checks in the directory.
• Temporal: Currently certified products populate the live tables, while the label-verification record set retains historical certificates for matching labels already installed in buildings.
• Granularity: One row per certified glazing variant within a product line — the sampled casement line contributed ten variants on its own.

Scale follows from that grain: 741 manufacturers spread across 14 product types, each shipping multiple product lines, each line splitting into rated variants. The total certified-unit count is not published anywhere, but per-line variant counts imply hundreds of thousands of individual rated rows. For anyone modeling the North American fenestration market, that depth is the asset — competitor catalogs document thousands of products, this documents every certified configuration with five comparable numbers apiece.

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Name the fields and the cadence when you request the sample — pushed to storage, served over an endpoint, or synced straight into your database. The sample ships first either way, so you can check the ratings against a label on your own window before anything recurring starts.

A certified-ratings registry earns its keep in specific jobs:

• Architects and spec writers — verify that a specified window's certified U-factor and SHGC meet the project's energy model assumptions before submittals, using the same numbers the code official will see.
• Competitive intel and product teams — benchmark a product line against every certified rival in its category: who else holds a 0.25 U-factor casement, and with what gas fill and frame economics.
• Market researchers — segment the 741-manufacturer landscape by frame material, gas fill and performance band to size addressable categories inside windows, skylights and glazed wall systems.
• Data scientists and energy modelers — build distribution curves over certified performance (how much U-factor separates a builder-grade double-hung from a passive-house casement) and feed realistic envelope parameters into simulations.
• Investors and analysts — track certification breadth per manufacturer as a demand signal tied to energy-code tightening across states and provinces.

The common thread: everyone needs the certified number itself, not a marketing claim next to it.

Datadory catalogs 24 building-products datasets, and they answer different questions about the same window. Sweets answers "who makes one and what are its spec-sheet options." ICC-ES Evaluation Reports answers "does it satisfy the code." Declare answers "what chemicals are in it," and GREENGUARD answers "what does it emit indoors." The NFRC directory answers "how does it perform thermally and optically, as certified."

The strongest workflows chain them: pick candidates in Sweets, confirm code standing in ICC-ES, then rank the survivors here on certified U-factor per dollar band — and screen indoor-air quality last with Declare and GREENGUARD. One product, four registries, zero duplicated schema.

Provenance note — the ratings originate from the National Fenestration Rating Council's certification program, the same program whose labels appear on shipped product; every row traces to a CPD certificate held by a named manufacturer.

Completeness note — no aggregate count of certified products is published anywhere in the program's materials. Row totals here derive bottom-up from the 741-entry manufacturer roster and observed per-line variant counts, which is why size claims elsewhere deserve suspicion.

Reading note — U-factor bounds differ by category (0.20–1.20 windows, 0.00–2.00 doors), so cross-category rankings need normalization before they mean anything.

Where to go next — for breadth of specification options, pair with Sweets Building Product Catalog; for code-compliance status, ICC-ES Evaluation Reports; for ingredient disclosure, Declare. The ranked shortlist lives on the best building products datasets page.