ThermaCell Insulating Cellular Shades

Insulation is simply trapped air. And no window covering traps air more effectively than a cellular honeycomb shade. Each hexagonal cell is a sealed pocket of still air—a thermal barrier between the cold (or hot) glass and your comfortable room. ThermaCell Insulating Cellular Shades are engineered to maximize this effect, with precise cell geometry, durable cell walls, and optional double-cell construction. The result is a shade that reduces heat transfer through windows by 25% to 45% , lowering your energy bills and improving year-round comfort. Yet these shades remain lightweight, beautiful, and easy to operate. Available in ¾-inch and 1⅛-inch single-cell, and 1⅛-inch double-cell configurations, with light-filtering, room-darkening, and blackout opacities. Custom‑sized to your exact window dimensions, with cordless, continuous cord loop, top-down/bottom-up, or motorized operation. The original insulating shade, perfected.

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How Honeycomb Cells Insulate

Still air is one of the most effective insulators—far superior to fabric alone. Each honeycomb cell traps a pocket of unmoving air, creating a thermal break between the cold window glass and your warm interior. Deeper cells (1⅛") and multi‑layer structures (double‑cell) trap more still air, increasing overall insulating performance.

R‑Value Comparison

Cell Configuration R‑Value Equivalent
¾" Single Cell 1.8 Storm window
1⅛" Single Cell 2.5 Double‑pane window
1⅛" Double Cell 3.5 Low‑E storm window
1⅛" Double Cell + Seals 5.2 Triple‑pane window

R‑values are measured at the center of the shade; actual performance varies based on window type and installation quality.

Year‑Round Benefits

  • Winter — Reduce heat loss through glass by up to 45%. Rooms stay warmer, drafts diminish, and heating costs drop.

  • Summer — Reduce solar heat gain by up to 45%. Interiors stay cooler, AC cycles less often, and cooling costs fall.

  • Shoulder Seasons — Adjustable shades let you capture passive solar warmth on cool days and block excess heat on warm ones.

ENERGY STAR® Qualified

Select ThermaCell shades meet ENERGY STAR® requirements for window coverings. Look for the certification mark on qualifying models. These shades may also be eligible for utility rebates or tax incentives depending on your region.

Not Just Insulation—Also Acoustic

The same trapped air cells that slow heat transfer also reduce sound transmission. ThermaCell shades lower perceived noise by 25–35%, creating a quieter, more peaceful home. This acoustic benefit is often overlooked but immediately noticeable.

Available in All Colors & Opacities

ThermaCell shades deliver high performance without limiting your design choices. They are available in over 30 colors and all opacities—light‑filtering, room‑darkening, and blackout. The insulating cell structure remains identical across all fabrics; only the face material changes.