What’s going on guys? here’s another 60-second tech tip, this is on supply and return grills and properly sealing them. As you can see this return grill that I have pulled down was not properly sealed. No silicone or mastic, so basically what’s happening you can see a little bit of wood here when the blower comes on it pulls air that’s pulling unconditioned air from between the sheetrock and the wood that’s framing this box out of the attic and into our Airstream. Since our air filter goes here as well most of this isn’t being filtered, it’s just passing right into the system. As you can see that return is fairly dirty so all of this should be sealed with mastic and usually we just silicone or you can mastic this as well. Same thing with supply grilles, so if you ever have customers that are dealing with dust issues or units getting dirty but the filters aren’t that dirty this could be your culprit. Make sure you’re paying attention to the supplier return grilles and look out for this kind of stuff so hope that helps thanks for watching.