Thermospan® Model 200-20

Insulated Sectional Steel Door
Thermospan® Model 200-20 is the ideal commercial sectional door for energy-conscious architects, engineers, contractors, and building owners. With a U-value* of .057 and R-value* of 17.5, this door outperforms most conventional insulated steel doors.
The Wayne Dalton Thermospan® Series doors are the only sectional doors in the industry with patented, roll-formed integral struts on each section, making them the most rigid doors available. The Thermospan® Series also has a patented manufacturing process with a polyurethane core that is continuously foamed-in-place between the outer and inner skins. An innovative thermal break keeps the interior skin at room temperature, preventing condensation and frost and helping to resist corrosion.



Key Product Features
Max Width: 24’2”
Max Height: 16’1”
20-gauge exterior steel
Polyurethane insulation, R-value* = 17.5; U-value* = .057
2” section thickness
10,000 cycle standard spring
Patented, roll-formed integral struts for rigidity

*Wayne Dalton uses a calculated door section R-value and U-value for insulated doors.
Door Construction

Joint seals prevent air infiltration and saves energy

Thermal break separates inner and outer skins so virtually no head or cold is conducted through the section.

Pre-painted inner and outer skins for added corrosion resistance

Solid polyurethane core provides maximum thermal efficiency and aids in quiet operation

Integral struts – Two 1-3/4” roll-formed struts per section increase rigidity and strength.

Two-inch nominal thickness

Heavy-duty 20-gauge smooth flush exterior skin gives the Thermospan 200-20 added strength and makes it ideal for large openings

IECC® Compliant
The Thermospan® 200-20 meets IECC® requirements for maximum U-factor of operable fenestrations (2015 Section C402.4) with a 3rd party certified tested value of less than 0.37. Thermospan® 200-20 also meets the ASHRAE 90.1 and IECC® requirement for maximum air leakage for fenestration assemblies (2015 Section C402.5.2 Garage doors) with a 3rd party certified tested value of less than 0.40.


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