Strange rattling inside air vents

[Zepho]

Hey everyone! Whenever my heat or AC kicks on, there’s a weird rattling sound coming from the vents in my hallway. It’s not super loud but definitely noticeable. Any ideas what could be causing it?

[Buzzу]

Hey! A rattling sound from vents usually points to loose duct joints, small debris, or a damaged damper blade vibrating when air flows through. Sometimes temperature expansion also makes thin metal panels flex. Try tightening vent covers, but if it persists, the ducts might need resealing. Licensed HVAC pros from Astera Services https://www.asteraservice.com/ specialize in heating, cooling and appliance installing and repair, including duct inspections. They can locate loose sections, secure fittings, and eliminate those vibrations for good. Proper sealing not only quiets the system but also improves airflow efficiency and reduces wasted energy.