Verified from the manufacturer’s own documentation · last checked September 19, 2026
| Manufacturer | Sierra Pacific |
|---|---|
| Series | H3 |
| Frame material | Fusion of three materials: extra heavy-duty 0.055-inch extruded aluminum exterior cladding, a 0.078-inch structural vinyl base (invisible when the window is closed), and a warm wood interior. Sierra Pacific describes this as its patented Fusion Technology. Wood interior in multiple species (pine, maple, alder, mahogany, cherry, red oak, walnut, white oak, mixed-grain Douglas fir); interior finishes in Ultra Stain (Clear, Espresso, Toffee) and Ultra Coat (White, Black); exterior in 75 finishes across 7 design collections. Aluminum cladding meets AAMA 2605 |
| Styles / configurations | Casement, awning, single- and double-hung, horizontal slider and direct-set / picture. Confirm the current H3 style range on Sierra Pacific's page |
| Glass options | Multiple leading-edge glazing options, dual or triple pane, with decorative glass options; various simulated divided lite grille profiles |
| U-factor | Not published as a single line-wide range; NFRC-certified performance follows the style and glazing package. Check the NFRC label on the exact unit quoted |
| SHGC | Not published as a single line-wide range; follows the glazing package. Check the NFRC label on the unit quoted |
| VT | Not publicly specified |
| ENERGY STAR | Sierra Pacific H3 configurations are ENERGY STAR certified per Sierra Pacific product specifications |
| NFRC certification | NFRC-certified performance follows the configuration; H3 windows carry WDMA Hallmark and AAMA certification with per-product performance data in Sierra Pacific's technical specifications |
| Warranty | Sierra Pacific's H3 Limited Warranty is transferable. Insulated glass carries a 20-year coverage term per dealer product specifications. Coverage details, labor terms and exclusions are set out in Sierra Pacific's current written warranty — request the current document before purchase |
| Positioning | Sierra Pacific's flagship premium window — patented Fusion Technology combining aluminum, vinyl and wood in a single frame. Sierra Pacific Windows is part of Sierra Pacific Industries, the second-largest lumber company in the US, and its products are installed in 30 countries. Positioned as a premium clad-wood alternative with aluminum-vinyl-wood hybrid construction |
| Price position | Premium clad-wood (patented hybrid construction) |
| Installation | New construction and replacement; custom, made-to-order through Sierra Pacific dealers |
Notes
Patented aluminum-vinyl-wood hybrid, unique among the manufacturers in this catalog. CoreGuard Plus wood treatment protects the wood interior against rot and insects. H3 dealer specifications quote a 20-year insulated glass coverage term; other component durations are not transcribed here — request Sierra Pacific's written warranty for full component terms and labor coverage. Performance data is style- and glazing-specific — check the NFRC label
Sources
Sierra Pacific's own 2025 Full Line catalog (sierrapacificwindows.com/pdf/2025_SPW FULL LINE 12_10_25.pdf) — H3 Fusion Technology (extruded aluminum + vinyl + wood), style range, Encore hardware, CoreGuard Plus wood treatment, new construction and replacement suitability, continuous head-and-sill mull option; 2023 Full Line catalog (sierrapacificwindows.com/pdf/2023_Full-Line_Catalog.pdf) for the same content in an earlier revision; 2020 catalog for cladding thickness statement (twice as thick as roll-form). Sierra Pacific dealer product specifications for the transferable Limited Warranty, 20-year insulated glass coverage, WDMA Hallmark, AAMA and ENERGY STAR certifications, and the 75-finish exterior colour palette