Duct sealing can make a huge difference in the efficiency of your home, HVAC system, and your utility costs. Think about it this way - if ducts are left unsealed, they will be hot in the summer and cold in the winter, like any under-insulated parts of your home. The air that your HVAC system worked so hard to cool or heat will be traveling through these ducts before being released into a room. Not only will the gaps in your duct system release a ton of air and efficiency, but it will be more difficult for the air to hold its temperature. Your heating and cooling system will have to work much harder, and take far longer to reach the desired temperature in your room.