All Weather Windows Horizon Series: Specs, Testing Data & Idaho Fit

Specifications & Testing Data

What the Horizon Series Actually Is

Horizon is All Weather Windows' middle tier. The manufacturer describes it as a line with fewer options than Apex but enough choice for buyers who want value for money, and that is exactly how it behaves on a job. It sits between the premium Apex Series (Apex Alloy 9950, Apex 9100, Summit 9700) and the builder-oriented Terrain Series (Terra 2700, Terra 2750, Terrano 2100). Two current sub-lines make up Horizon, and they split by operating style rather than by quality:

The one-piece base frame is the Alpine's whole argument. Most vinyl sliders are assembled from several extrusions screwed together; a single extrusion has fewer seams to leak or flex, and it lets the glass sit in the centre of the wall assembly instead of at the outside face — warmer interior glass, less condensation on a January morning. The Ascent is the compression-seal sibling: casements and awnings that crank shut against a triple weatherstrip, which is why they test tighter for air infiltration than any slider on the market.

One naming note. All Weather sold a slider called the Horizon 7100 (4 1/2" frame, bevelled sash, exterior colour wrap) through roughly 2019; that model is gone from the current catalogue. If your home has them, warranty service still runs through us.

The Numbers That Matter

All Weather publishes centre-of-glass (COG) performance on its consumer site rather than whole-window NFRC numbers, so read the following carefully. COG figures are always better than the NFRC rating on the label, because the frame and edge-of-glass are excluded. The manufacturer's glass chart (Vision v4.0 simulations, ASHRAE winter conditions, imperial units) shows:

• Dual-pane, one Low-E coating, argon (ComfortGain 180): COG U 0.26, SHGC 0.69
• Dual-pane, one SunStop coating, argon (ComfortPlus 270): COG U 0.25, SHGC 0.37
• Triple-pane, two Low-E coatings, argon (ComfortGain 180): COG U 0.13, SHGC 0.56
• Triple-pane, two SunStop coatings, argon (ComfortPlus 270): COG U 0.12, SHGC 0.31

The practical takeaway: a triple-pane Alpine or Ascent lands comfortably under the U ≤ 0.30 prescriptive figure Idaho's energy code sets for climate zones 5 and 6, while a dual-pane unit needs its whole-window label checked before anyone assumes it does. We quote the NFRC number per unit. Do not accept a COG figure as a code number from any salesperson.

ENERGY STAR needs the same care. Since January 2020 Canada has used a single national zone, and its window threshold (about U ≤ 1.22 W/m²·K, roughly 0.21 imperial, or an Energy Rating of 34 or better) is tighter than the US Northern zone's U ≤ 0.22 under the version 7.0 criteria. A Canadian ENERGY STAR label on an All Weather unit is a strong signal, but it is not the US label an Idaho utility rebate asks for; where a US-certified configuration matters, we confirm it before ordering. Structural ratings follow NAFS, the harmonized North American standard, with Performance Grades that vary by size — the label on each unit states the PG.

Where It Fits in Idaho — and Where It Doesn't

Where it earns its keep. Whole-house replacement on 1990s–2010s Meridian, Nampa and Kuna subdivision homes, where the original sliders were builder-grade and the owner wants a genuine cold-weather upgrade without paying for Apex's colour and trim options. Cabins and second homes in McCall and Cascade, where zone 6B winters turn the triple-pane Alpine and the compression-sealed Ascent from upgrades into sensible defaults. Homes on Canyon County's open ground, where the Ascent's casement seal handles wind-driven air better than any slider.

Where we steer you elsewhere. If you want exterior colour on a slider, the Alpine comes in white only — the Apex 9100 and Summit 9700 carry the acrylic wrap. If the house is a North End bungalow under historic design review, vinyl of any brand is usually the wrong material. For a slim modern frame with maximum glass, the Milgard Trinsic shows more daylight per opening. And for a rental where a domestic lifetime warranty matters more than winter numbers, the Milgard Tuscany is the plainer answer.

One honest logistics point: these windows ship from Edmonton, and a border crossing sits between the factory and your house. Lead times move with season and customs; we quote the current one in writing rather than guessing here.

Warranty and Service, Locally

All Weather's Canadian residential warranty has run 20 years on seal failure of the insulated glass and 20 years on vinyl components, 10 years on paint and coatings applied to vinyl, two years on general workmanship, and one year on spontaneous glass breakage — transferable to a new owner on a single-family detached home. A revised Maintenance & Warranty Guide took effect August 4, 2026; we confirm the terms on your paperwork at quote time. Either way, the claim comes to Wood Windows Inc. Our own employees — not a subcontractor, not a call centre in Alberta — have handled service on every window we've installed for 46 years out of Garden City.

Want an Alpine or Ascent quoted next to the Apex and a Milgard for the same openings? One free measure covers all of them — use the form on this page or call (208) 376-2200.

Last reviewed 2026-09-10 by Wood Windows Inc — (208) 376-2200