Reference tables
Look-up charts built from stable fenestration geometry, heat transfer and labeled industry / code typicals — the ENERGY STAR & IECC climate-zone requirements, U-factor & SHGC by frame and glazing, the united-inches sizing convention, standard rough-opening gaps, IRC R310 egress minimums, and installed cost bands by window type & frame and by door type.
Typical published planning values / code minimums — NOT a certified design or a compliance sign-off. Actual egress compliance and energy performance depend on your local building code (AHJ), climate zone, the exact product’s NFRC-rated U-factor & SHGC and the installation; confirm against local code and the manufacturer’s NFRC label, and consult a pro. Structural headers for enlarged openings, whole-building heat-load / HVAC sizing and code certification are set by code and a professional — not engineered here.
ENERGY STAR & IECC window U-factor & SHGC by climate zoneThe signature reference: LABELED ENERGY STAR 7.0 and IECC 2021 maximum window U-factor and SHGC by US climate zone, side by side, with the derived R-value (R = 1 ÷ U).Typical U-factor & SHGC by frame material and glazingThe signature companion: LABELED typical whole-window U-factor and SHGC by frame material × glazing, with the derived R-value (R = 1 ÷ U).United-inches sizing convention (common window sizes)LABELED united-inches (width + height) and glass square footage for common stock window sizes — the ordering/pricing convention.Standard rough-opening shim & jamb allowancesLABELED standard rough-opening allowances — ½ in shim per side for windows, +2 in W / +2.5 in H for pre-hung doors.IRC R310 emergency-escape egress minimumsLABELED IRC R310 emergency-escape minimums — clear opening ≥ 5.7 sq ft (5.0 at grade floor), width ≥ 20 in, height ≥ 24 in, sill ≤ 44 in.Installed window cost bands by type & frame materialLABELED installed $/window bands by window type and by frame material — a sanity guide only, you enter the real price.Installed exterior-door cost bands by typeLABELED installed $/door bands by type (entry steel/fiberglass, patio/sliding, French, storm) — a sanity guide only.