Compare Panes window performance

Compare two published configurations

Choose two certified reference configurations to compare their whole-window ratings. Each choice identifies the Panes series, glass package and NFRC CPD number. Use the comparison when specifying a replacement window or a new-construction opening.

Match the complete window

Compare the same operating style, frame system and glass package when reviewing a quote. The NFRC record covers the complete window, including the frame and glass. A glass-only value or a coating name does not describe the complete assembly.

Choose the glass for the room

A lower U-factor means less heat transfer. SHGC describes admitted solar heat, while VT describes admitted visible light. For Midwest and Northeast projects, consider winter heat loss, summer exposure, orientation and shading together. The lowest SHGC is not automatically the best choice for every opening.

Keep certification and project requirements together

The CPD number identifies the certified reference configuration. Match it to the selected product and its label. Your builder or project professional can use the applicable documentation when checking local project requirements and the finished opening.

Compare double and triple glazing directly

Use the two selectors to hold the window series constant while changing its glass package. Review U-factor, solar gain and visible light together. Compare the actual configured price separately; a rating comparison does not calculate a household utility bill or payback period.

ENERGY STAR for your US project

US ENERGY STAR window criteria depend on climate zone. Use the official state-and-county finder, then confirm the selected product’s ENERGY STAR listing and label. NFRC publishes performance ratings; ENERGY STAR applies separate qualification requirements.

Whole-window performance you can compare

Panes manufactures certified casement, awning, hung, slider and fixed window systems. Compare published NFRC reference configurations, including lift-out and tilt slider series and both low-profile and high-profile fixed windows. The directory identifies Panes Window Manufacturing Inc. as the manufacturer.

U-factor

Heat transfer through the complete window. Lower values indicate better insulation. U.S. values use Btu/(h·ft²·°F); metric equivalents use W/(m²·K).

SHGC

Solar heat gain coefficient, from 0 to 1. Lower values admit less solar heat.

VT

Visible transmittance, from 0 to 1. Higher values admit more visible light.

These reference configurations have no grilles. Each row preserves the NFRC manufacturer code for its frame, glass and gas combination. Select the matching series and glass package, and confirm the CPD number and label for your order. Different glass, grilles, frame systems and joined assemblies can have different ratings.

For Midwest and Northeast projects, compare heat transfer, winter sunlight and summer exposure together. A lower U-factor indicates less heat transfer. A lower SHGC admits less solar heat; a higher SHGC admits more. VT describes visible light transmission. Orientation, shading and local code affect the choice. NFRC ratings alone do not establish ENERGY STAR eligibility.

Download the reference ratings and source links (CSV) · Download the printable reference (PDF)

Match the rating to your made-to-order window

Keep the frame dimensions, operating style, glass, grilles and hardware together in your approved specification. Ask Panes for the applicable certification label or CPD reference when comparing quotes.