🏢 NFRC 100 / 500 Thermally Broken Frames (U 0.32-0.45), CRF 70+ & ASHRAE 90.1

Curtainwall Thermal U-Factor & CRF Calculator

Model commercial unitized and stick curtainwall energy compliance under NFRC 100/500 & ASHRAE 90.1: calculate total system U-factor (framing + vision glass + thermal isolator strips), Condensation Resistance Factor (CRF 65-75 preventing interior winter frost), HVAC peak cooling load reduction, and facade contractor margins.

1. Project & Operating Inputs

Curtainwall Facade Area (Square Feet e.g. 18,000 Sq Ft)

System Assembly U-Factor (BTU/hr-ft²-°F e.g. 0.36 U-Factor)

Customer Turnkey Invoiced Facade Bid ($ / Sq Ft e.g. $115/SqFt)

Thermally Broken Extrusions, Polyamide Bars, Triple IGU & Install ($ / Sq Ft)

2. Financial Breakdown & Yield

NFRC CURTAINWALL THERMAL SIZING

Turnkey Facade Package Profit

Curtainwall Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost