Garage Door Opener

Garage doors have several types of chain systems for

its function.  These types usually fit the owner’s purpose

for the garage.  These systems are the:

        computer-controlled system - Computer controlled

 system is maneuvered with the use of a remote control. 

        screw-drive system – The door garage with a

screw-drive system works by sliding along the length

of a steel mechanism that lifts the door garage. 

         chain drive system - The chain-drive system

works with the use of a chain that mechanically moves

the garage door panels along a track.   The chain-drive

system is the most inexpensive type of system and is

the most commonly used among the three. 

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*** Chamberlain Whisper Drive 1/2 HP Garage Door Opener #WD822KD

*** Chamberlain Power Drive 1/2 HP Security Plus Chain Drive Garage Door Opener PD210D

*** Chamberlain PD752D 3/4 HP Chain Drive Garage Door Opener, Blue