ThermaCell Thermal Cellular Shades
R‑Value Comparison
| Cell Configuration | R‑Value | Heat Transfer Reduction |
|---|---|---|
| ¾" Single Cell | 1.8 | 25% |
| 1⅛" Single Cell | 2.5 | 35% |
| 1⅛" Double Cell | 3.5 | 45% |
| 1⅛" Double Cell + Seals | 5.2 | 65% |
R‑values are measured at the center of the shade; actual performance varies based on window type, climate, and installation quality.
How Cellular Shades Insulate
Still air is one of the most effective insulators—far superior to fabric alone. Each honeycomb cell traps a pocket of air that cannot circulate, creating a thermal break between the window glass and your interior. Deeper cells (1⅛") and multi‑layer structures (double‑cell) trap more still air, increasing insulating performance and improving comfort.
Year‑Round Benefits
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Winter — Reduce heat loss through glass by up to 45%. Rooms stay warmer, drafts diminish, and heating costs drop.
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Summer — Reduce solar heat gain by up to 45%. Interiors stay cooler, AC cycles less often, and energy bills fall.
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Shoulder Seasons — Adjust the shade to capture passive solar warmth on cool days or block it on warm days.
ENERGY STAR® Qualified
Select ThermaCell shades meet ENERGY STAR® criteria for window coverings. Look for the certification mark on qualifying products. These shades may also be eligible for utility rebates or tax incentives, depending on your region.
Perimeter Sealing Upgrade
For maximum thermal performance, add our ThermoSeal perimeter sealing system. Side channels, a magnetic bottom seal, and a top seal work together to eliminate air infiltration around the shade edges. This upgrade is especially effective on older or draft‑prone windows.
Energy Savings Calculator
Our website features an interactive energy savings calculator that estimates your annual savings. Enter your window size, climate zone, energy costs, and shade configuration. Typical payback periods range from 3 to 7 years—after that, the savings are pure return.
Available in All Colors & Opacities
Thermal performance never limits your design choices. ThermaCell shades are available in over 30 colors and all opacities—light‑filtering, room‑darkening, and blackout. The insulating cell structure remains identical across fabrics; only the face material changes.
