Overhead Door Company of Norwich Inc.

Advanced Sectional Doors

The Thermacore® AP Model 850 is engineered to deliver advanced performance in commercial and industrial applications where climate control, durability and ease of maintenance are primary concerns.

The Thermacore® AP door system’s advanced performance answers the demand for more thermal efficiency, reliability, durability and design flexibility.

Standard max width

40’2″ (12,243 mm)

Standard max height

24’1″ (7317 mm)

Panel thickness

3″ (76.2 mm)


26 (4.58 Msq/W)


0.038 (.22 W/Msq)

Installed U-Factor

.14 Btu/hr x ft² x Fº (.80 W/Msq)

Air infiltration

At 15 mph (24 kmph) .09 cfm/ft² (1.65 m³/hr/m²)

Thermal break

1-3/4″ wide PVC thermal break; PVC thermal break on end stiles


10 year limited delamination
1 year material and workmanship
3 year/20,000 cycle door and operator system (material and workmanship)


White Brown Almond Taupe

Additional Options

Large thermal lites (25″ w x 13″ h) Glass: insulated, insulated tempered, multi-wall polycarbonate in clear, bronze, or white High-cycle springs High-usage components Electric operator Chain hoist Cable failure device Bottom sensing edge


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