The answer to 'which is better air duct sealing or' is that air duct sealing is generally better than other duct repair methods for most homeowners. Air duct sealing involves using specialized sealants to close any cracks, holes, or gaps in your home's ductwork, which can improve the efficiency of your HVAC system and reduce energy costs.
Compared to other options like duct replacement or duct insulation, air duct sealing is typically more cost-effective and can be done without major disruption to your home. It's an effective way to improve indoor air quality, reduce dust and allergens, and ensure your HVAC system is operating at peak performance.