Triple Pane Passive House Windows
U-factor ≤ 0.14, warm-edge spacers, fiberglass or wood-clad frames — the energy-and-health workhorse of every Passive House.
Toxicity Screening — All Clear
This material screens clear across all seven independent toxicology authorities we use on every project.
Material Type
High-Performance Triple-Glazed Window Assembly
Material Description
Passive-House-grade windows combine three things you don't get in conventional windows: three lites of glass with two low-e coatings and argon or krypton fill (U-factor down to 0.10-0.14), warm-edge spacers that eliminate the cold-edge condensation seen in aluminum-spacer windows, and a thermally-broken frame in fiberglass, wood-clad, or PHI-certified aluminum-thermal-break. The result is a window that performs essentially as well as the surrounding wall — interior glass surface stays close to room temperature even at -10°F outside, eliminating cold drafts and condensation that drive mold. EBH avoids uPVC (vinyl) frames — that's an entire chemistry family on the Avoid list — and specifies fiberglass or wood-clad-aluminum frames.
Composition & Origin
Health Profile — All Endpoints Clear
Severity scored 0–10 against the same 10 hazard endpoints we use for the chemical families on the avoid list. Every score is 1–2 — essentially no signal across every endpoint.
Common Forms & Brands
- Alpen High Performance Series 525 / 725
- Zola European Hybrid
- Pinnacle PHC certified passive-house windows
- Common framing: fiberglass triple-pane, wood-clad triple-pane, thermally-broken aluminum (PHI-certified)
Why We Use It
- Interior glass surface stays warm — no condensation, no cold drafts
- Solar-heat-gain coefficient tunable per orientation
- Acoustic performance dramatically better than dual-pane
- No off-gassing — glass, metal, and fiberglass-resin frame (not uPVC)
- 30-50 year service life with proper installation
Where It Performs Best
- All exterior windows in new construction and deep retrofits
- Passive House and net-zero residential projects
- Curtain wall installations in cold climates
- Skylight units (where triple-glazed available)
Building Applications for Triple Pane Passive House Windows
Listed alphabetically. Where in a home this material earns its keep.
Curtain Wall Glazing
Fixed & Operable Windows
French Doors & Patio Doors
Skylights & Roof Glazing
Sliding Door Assemblies
Triple Pane Passive House Windows on a Bay Area Home
Triple Pane Passive House Windows is one of the materials we actually install. Every product that reaches an Earth Bound Homes jobsite is screened against seven independent toxicology databases first, so the healthy home we hand over is healthy in the walls, not just on the brochure.
If you are planning a new house or a deep remodel and you want this level of material control, that is the whole job we do. Earth Bound Homes builds in Los Gatos, San Jose, Santa Clara County and across the San Francisco Bay Area.