This issue of motor options usually is one of the first questions broached when starting to investigate and navigate the large range of lift chair options available. The motor, as stated above, is the control box allowing the lift feature in lift chairs. So. What are the options? In simple terms: the more motors the chair has, the more options you have.
SINGLE MOTOR
A single motor lift chair will allow your legs to raise, then it will recline your backrest. When you sit up in the chair, the back will sit you up, then the footrest will pack away, and if you keep your finger on the button you will rise to your feet.
DUAL MOTOR
A dual motor lift chair will allow you to bring your feet up for a relaxed afternoon with a book. You can also bring your feet up and recline your back for a nice relaxing afternoon nap. Because you can move the backrest and leg rest separately, you can achieve many more positions than with a single motor lift chair, and you are not restricted to the order you need to do things.
TILT IN SPACE
Triple motor recliner has been developed to give you more adjustment than ever before with tilt in space or zero gravity position and Trendelenburg option. Tilt in space helps you maintain a more supported position when reclined whilst the Trendelenburg position is the ability to raise your ankles higher than your heart, allowing for optimal relief from various medical conditions.
You have full control over your level of comfort and how you want to be positioned thanks to the quad motor technology that has completely integrated, independently powered adjustments for the headrest, lumbar support, backrest, and footrest.
Source : (Pride Mobility)