How much room do I need above my door to install my garage door opener?

Which model is better the chain drive or the belt drive?

What horsepower do you recommend for your garage door openers?

When I install an electric operator, is there some type of hardware required to attach the operator lifting arm it to the door?

How long does it take to install a garage door opener?

Will your garage door opener open my eight, nine or ten foot high door?