Go with 1 2 hp for a double door and 3 4 hp for a door that has a wood or faux wood overlay they can be heavy.
How to install a replacement garage door opener.
Consider this when making the choice of what opener to buy.
Both operate in roughly the same way but just use a slightly different part for operation.
If your opener model is no longer manufactured it may not be easy to find a new remote designed specifically for your opener.
Mount the new motor in the same location as the old one.
A belt driven garage door opener can be a bit quieter during operation.
If the garage door opener is 20 years old or newer a universal garage door opener remote may work as a replacement remote.
Choose a garage door opener.
Some brands may work with even older door opener units.
Install the end of the rail in the bracket that held the old opener above the garage door and secure it with the fastener bolts or clevis pin.
Choose the right garage door opener.
There are two basic types of garage door openers chain driven and belt driven.