Name: Cornell Thermiser® Insulated Rolling Door
Brand: CornellCookson

Product Info

All specifications sourced from CornellCookson's official Thermiser® product documentation (Model ESD20). The Thermiser is Cornell's standard insulated rolling door — designed for exterior use where maintaining environmental separation between conditioned and unconditioned spaces is required.

Thermal & Acoustic Performance
R-Value	R-8 (calculated using ASHRAE Handbook of Fundamentals)
Insulation Type	7/8" thick closed-cell pressure foamed-in-place urethane
Flame Spread Index	0 (tested per ASTM E84)
Smoke Developed Index	10 (tested per ASTM E84)
CFC-Free	Yes — Ozone Depletion Potential rating of 0
Building Code	Meets foam plastic insulation requirements of 2012 IBC® Section 2603
STC Rating	Up to 30 for the complete door assembly
ASHRAE Compliance	Meets ASHRAE 90.1 air infiltration requirements
Construction
Slat Design	Double-skin interlocking roll-formed interior and exterior metal slats
Galvanized Steel Options	24/24 ga · 22/24 ga · 22/22 ga · 20/24 ga · 18/24 ga (exterior/interior)
Standard Colors (Galv.)	Brown, Gray, Tan, White, Black (availability varies by gauge — contact DOORTEC)
Stainless Steel	Available — contact DOORTEC for gauge options
Aluminum	Available — contact DOORTEC for gauge options
Cycle Life
Standard Cycle Rating	Up to 20 cycles per day — 50,000 cycles lifetime
Warranty Period	50,000-cycle standard warranty
High Cycle Option	For applications requiring more than 20 cycles per day — contact DOORTEC for High Performance Door options

The Thermiser stands out from standard insulated rolling doors through its double-skin slat construction and foamed-in-place urethane process — the insulation bonds directly to both the interior and exterior slat faces, creating a structurally integrated thermal barrier rather than a simple filled cavity.

Double-skin interlocking slat construction — exterior and interior metal faces with 7/8" foamed-in-place urethane bonded to both skins, creating structural integrity and thermal performance in a single assembly

R-8 thermal value calculated using the ASHRAE Handbook of Fundamentals — higher than the Wayne Dalton 800C's R-7.7, and appropriate for exterior openings on climate-controlled facilities

Sound Transmission Class (STC) up to 30 for the complete door assembly — meaningful noise reduction for facilities adjacent to production equipment, traffic, or noise-sensitive neighbors

CFC-free foaming process with Ozone Depletion Potential of 0 — complies with environmental standards and meets 2012 IBC Section 2603 foam plastic insulation requirements

Flame Spread Index of 0 and Smoke Developed Index of 10 per ASTM E84 — fire performance values that meet code requirements for insulated curtain materials in commercial construction

Compact coil design stores overhead with minimal headroom requirement — the double-skin slat coils efficiently without sacrificing opening height

50,000-cycle standard warranty — designed for up to 20 cycles per day, which translates to approximately 7 years of daily operation at that rate

ASHRAE 90.1 compliant air infiltration performance — important for energy code compliance in commercial construction throughout Oklahoma and surrounding states

The Thermiser is designed specifically for exterior openings where maintaining different temperatures on each side of the door is the primary requirement. It's the standard specification for climate-controlled distribution, cold storage, food service, and hospitality facilities.

Distribution Centers

Cold Storage & Refrigerated

Food & Beverage Facilities

Retail & Hospitality

Industrial Facilities

Exterior Building Openings

The Thermiser can be operated by motor, chain, hand-crank, or push-up depending on door size, weight, and cycle frequency. Cornell offers two primary operator models for the Thermiser — contact DOORTEC to specify the right operator for your application.

Model MG Operator: Medium-duty operator for doors cycling no more than 20 times per day — standard for most Thermiser applications. Electric motor operation with standard controls.

Model SG Operator: Super-duty, full logic operator for larger doors or doors that may periodically cycle more than 20 times per day. Recommended for wide openings or heavy-use applications.

Chain Hoist: Manual chain operation for facilities without convenient electrical access or applications where power backup is preferred.

Push-Up Operation: Manual push-up for smaller, lighter Thermiser doors — no operator required, lowest installation cost for infrequently cycled openings.

High Cycle Applications: For facilities requiring more than 20 cycles per day, DOORTEC recommends Cornell's High Performance Door line rather than the standard Thermiser — contact us to discuss your duty cycle requirements.

Cornell backs the Thermiser with a 50,000-cycle standard warranty — tied to the door's rated cycle life of 20 cycles per day. DOORTEC adds its installation workmanship guarantee on top of manufacturer coverage.

50,000-Cycle Standard Warranty Cornell warrants the Thermiser for 50,000 cycles standard — rated for up to 20 cycles per day. This represents approximately 7 years of daily operation at that cycle rate.

Cornell 50,000-cycle warranty — standard coverage for the Thermiser ESD20

DOORTEC Workmanship Guarantee — any installation issue is returned and corrected at no charge

For applications exceeding 20 cycles per day, the Thermiser Max or High Performance Door lines carry higher cycle warranties — ask DOORTEC for details

DOORTEC installs the Cornell Thermiser throughout Oklahoma City, Edmond, Norman, Moore, Yukon, Midwest City, Guthrie, El Reno, and Tulsa. Our factory-trained technicians handle everything from site assessment through full commissioning and operator programming.

DOORTEC Commercial Installation Process
Site Assessment	We assess opening dimensions, header clearance, wall construction, structural mounting requirements, and electrical availability for operator installation.
Specification	We specify curtain gauge, exterior/interior slat combination, finish color, operator type (MG, SG, chain, push-up), and any accessories based on your facility's cycle rate and environment.
Installation	Factory-trained technicians install guides, barrel assembly, double-skin curtain, bottom bar, and operator to Cornell specifications.
Operator Setup	Full motor programming, travel limit adjustment, and safety device commissioning before leaving the site.
Safety Testing	Full obstruction reversal and safety edge testing before sign-off.
Service Coverage	Oklahoma City · Edmond · Norman · Moore · Yukon · Midwest City · Guthrie · El Reno · Tulsa

Thermiser® Installation in Oklahoma City

The Cornell Thermiser is DOORTEC's recommendation for Oklahoma City facilities with exterior openings requiring genuine thermal separation — not just a standard insulated door, but a double-skin construction with a certified R-8 value and ASHRAE 90.1 compliance. In an Oklahoma City climate where summer temperatures regularly exceed 100°F, the difference between a properly specified insulated rolling door and a standard curtain translates directly into annual energy costs for climate-controlled facilities.

DOORTEC installs the Thermiser for distribution centers, cold storage operations, food manufacturing facilities, and any Oklahoma City business where maintaining conditioned air inside the building is a genuine operational priority. Call (405) 720-7107 for a free commercial site assessment and quote across Oklahoma City, Edmond, Norman, Moore, Yukon, Midwest City, Guthrie, and El Reno.

Insulated Commercial Rolling Doors Tulsa & OKC

DOORTEC's Tulsa location at 1835 N 106th E Ave serves Tulsa-area distribution centers, manufacturing plants, and cold storage facilities with the Cornell Thermiser and the full CornellCookson commercial door line. The greater Tulsa metro has significant industrial and distribution infrastructure where properly specified insulated rolling doors deliver measurable energy savings over the life of the installation.

For Tulsa facilities with very high cycle requirements — more than 20 cycles per day — ask DOORTEC about the Thermiser Max or Cornell's High Performance Door line, which carry higher cycle warranties for continuous heavy use. If you're not certain which door is right for your duty cycle, our commercial team will assess your facility and make a specific recommendation at no charge. Contact us at (405) 720-7107 or online at doortec.com.