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Windows in Washington

Fenstür delivers on its own trucks in Washington.

Washington spans IECC climate zones 4, 5 and 6. In the strictest zone (4), the IECC prescriptive limit for windows in houses is U-0.30. Washington sets its own window limits, listed below. 7 lines from 1 manufacturer are sold in Washington: 7 have not published NFRC ratings yet.

The Washington State Energy Code is among the most stringent in the US. Seattle adopts its own amendments on top of it.

Window limits under Washington's own code: The Washington State Energy Code, Residential (WSEC-R) sets fenestration U-factor limits tighter than the IECC table, and adds credits that reward better windows. The IECC table is shown for reference only.

Buying in Washington

IECC window limits by zone, for reference

IECC prescriptive window limits for Washington
IECC climate zoneMax U-factorMax SHGC
Zone 40.30No requirement
Zone 50.30No requirement
Zone 60.30No requirement

Source: IECC 2021, Table R402.1.2 (verify against adopted edition). Values are a draft. Confirm the edition your jurisdiction has adopted. Use the code lookup to check one zone.

Lines sold in Washington, checked against zone 4

"Meets" means the line's best published NFRC rating is within U-0.30. Codes need rated values, so a line without them shows "Not published" until the manufacturer publishes them. Ask the sales rep for the rating of your exact configuration.

Window lines sold in Washington checked against zone 4 limits
ProductBest U-factorZone 4
Casement and Awning 78
Fenstür Windows & Doors
Not publishedNot published
Climatech Lift and Slide
Fenstür Windows & Doors
Not publishedNot published
Expression Series
Fenstür Windows & Doors
Not publishedNot published
Imago Lift and Slide
Fenstür Windows & Doors
Not publishedNot published
Picture Windows
Fenstür Windows & Doors
Not publishedNot published
Tilt and Turn 106 Passive
Fenstür Windows & Doors
Not publishedNot published
Tilt and Turn 78
Fenstür Windows & Doors
Not publishedNot published

Full schedule for Washington

Window lines sold in Washington
FrameThe frame material. Aluminum-clad wood has a timber frame with an aluminum skin outside; all-wood shows timber on both faces.OperationHow the window opens: casement, awning, hung, sliding, tilt-turn or fixed. The symbols show the hinge side or travel direction.ImpactTested to withstand wind-borne debris (ASTM E1886/E1996). Required in hurricane debris regions unless shutters are used.GlazingThe number of glass panes in the sealed unit: double, triple or quad. More panes insulate better and weigh more.InstallHow the unit attaches to the opening: nail fin, flush fin, block frame or replacement insert.Verified
Casement and Awning 78
Fenstür Windows & Doors RFV partner
Aluminum-clad wood or All-woodCasementAwningCW-PG45Not publishedNot publishedNot publishedNot publishedNot publishedDoubleBlock frameNot publishedNot publishedDraft
Climatech Lift and Slide
Fenstür Windows & Doors RFV partner
Aluminum-clad wood or All-woodLift and slide doorFixedLC-PG30Not publishedNot publishedNot publishedNot publishedNot publishedDouble, TripleBlock frameNot publishedNot publishedDraft
Expression Series
Fenstür Windows & Doors RFV partner
All-woodFixedTilt-turnHopperNot publishedNot publishedNot publishedNot publishedNot publishedNot publishedDoubleBlock frameNot publishedNot publishedDraft
Imago Lift and Slide
Fenstür Windows & Doors RFV partner
All-woodLift and slide doorFixedLC-PG30Not publishedNot publishedNot publishedNot publishedNot publishedDouble, TripleBlock frameNot publishedNot publishedDraft
Picture Windows
Fenstür Windows & Doors RFV partner
Aluminum-clad wood or All-woodFixedCW-PG55Not publishedNot publishedNot publishedNot publishedNot publishedDouble, Triple, QuadBlock frameNot publishedNot publishedDraft
Tilt and Turn 106 Passive
Fenstür Windows & Doors RFV partner
Aluminum-clad wood or All-woodTilt-turnHopperCW-PG70Not published0.14PHINot publishedNot publishedNot publishedTriple, QuadBlock frameNot publishedNot publishedDraft
Tilt and Turn 78
Fenstür Windows & Doors RFV partner
Aluminum-clad wood or All-woodTilt-turnHopperCW-PG70Not publishedNot publishedNot publishedNot publishedNot publishedDoubleBlock frameNot publishedNot publishedDraft

Showing 7 of 7 lines. Ranges cover every available configuration. Confirm the exact configuration against its NFRC label.

Manufacturers selling in Washington

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