The answer to 'should I get air duct sealing or' is that air duct sealing can be a beneficial upgrade for many homeowners. Sealing air ducts helps improve the efficiency of your HVAC system by preventing conditioned air from leaking out, which can save you money on energy bills. It also helps improve indoor air quality by reducing the amount of dust, allergens, and other pollutants that can be pulled into the ductwork.
The process of air duct sealing typically involves inspecting the ductwork for any cracks or gaps, then using a specialized sealant to close those leaks. This can be done by a professional HVAC technician, or in some cases, as a DIY project. The cost and complexity will depend on the size and accessibility of your ductwork, as well as whether any duct cleaning or other repairs are needed.