Retrofit compatibility
If you’re choosing a retrofit, take a close look at the product page, which should list the brands that the retrofit works with. It should also detail important caveats, like if the retrofit won’t work on garage doors of a certain age (late 90s/early 2000s doors may have compatibility trouble). Some retrofits won’t work on certain garage door sensor designs, either. Pay attention to all these details before making a choice.
Height
Garage door motor kits are typically rated for height, usually the standard 7 feet. If your garage door is higher, you may be able to spend extra on an extension kit, a.k.a. extra tracks to fit higher garage doors.
Horsepower
Horsepower requirements vary based on the side of the garage door and its overall weight. If you’re getting a new motor, match the HP of your old motor. The smallest, lightest doors can get by on 0.3HP, but larger and sturdier
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