There are three main types of garage door openers: chain-drive, belt-drive, and screw-drive. Chain-drive openers are durable and cost-effective but can be noisy. Belt-drive openers are quieter and provide smooth operation, making them ideal for homes where the garage is adjacent to living spaces. Screw-drive openers are also quiet and require minimal maintenance. PT Doors strongly recommend the Merlin range of Belt-drive motors for residential purposes.