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DSI - Door Services Inc. - Portland, Maine
Commercial Overhead Doors
Residential Garage Doors
Sales, Installation and Service
Servicing Maine, New Hampshire and Mass.
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Toll Free: (800) 540-5696 | Portland: (207) 797-5696
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Residential Operators
 Linear LDO50
A high-quality, heavy-duty garage door opener designed to provide years of trouble free service on even the most difficult applications.
- 1/2 HP Chain or Belt Drive opener
- Three button remote control
- Deluxe wall station
- Smooth, quiet operation
- Automatic courtesy light.
Comes standard with: Deluxe Wall Control Station and 3-Button Remote Control.
 Linear LDO33 Linear LDO33
A high-quality garage door opener designed to provide years of trouble free use.
- 1/3 HP Chain or Belt Drive opener
- Three button remote control
- Deluxe wall station
- Automatic courtesy light.
Comes standard with: Deluxe Wall Control Station and 3-Button Remote Control.
Linear Model LDCO800
Energy-efficient, green DC-powered garage door opener designed with a smooth-start and soft-stop, ultra-quiet, long-term reliable performance. 800 Newtons of lifting force (equivalent ½ HP AC speed) Eco-friendly, green design with DC-power Belt Drive Three button remote control
- Deluxe wall station
- Superior smooth, quiet operation
- 100 watt courtesy light (bulb not included)
- Lifetime Warranty of Motor and Belt
Linear Model LCO75
 LCO75 The Model LCO75 3/4 HP Deluxe Dual Lamp Garage Door Operator is Linear’s most powerful door operator yet. It can be used in light-duty commercial installations or in residential applications with heavy carriage house style garage doors. The LCO75 has a maximum duty cycle rating of 13 operations per hour; 50 operations per day, far more than other operator designs.
- All steel frame
- Noise-reducing technology for quieter operation
- Commercial grade rail system
- Easy external limit adjustment
- Quick release door arm for manual operation
- Automatic reconnect trolley
- Standard door speed is approximately 9 inches per second
- Standard rail and chain assemblies for 8, 10, 12, and 14 foot doors
- Motor thermal overload protection
- Torque sensing reversing
- Solid state control circuitry
- Deluxe lighted wall station
- 3-Button MegaCode transmitter
- Built-in MegaCode format receiver
- Includes infrared photo eye safety beam
- Dual courtesy lights
Linear Model LSO50
Exceptionally quiet belt drive opener. Built-in vibration isolation system keeps noise and vibration from being transferred to the rest of the house.
- 1/2 HP Chain or Belt Drive opener
- Three button remote control
- Deluxe wall station
- Smooth, quiet operation
- Belt drive or chain drive
- Dual 100 watt courtesy lights
- Noise reduction technology.
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