[quote name='"SwagCaleb"']Can you blow weed through the air vents in a air conditioner and eliminate the smell?[/quote] No you'll spread it all over the house to other vents or blow it right back up.
If you blow it into a vent it'll blow back out at you. Modern airconditioners have an intake vent, usually near the thermostat and similarly placed on each floor, which draws the warm air in and spits it back out as cold through the registers everywhere else in the house. If you blow smoke into the vent in your bedroom or whatever, the next time the AC kicks on your shit is gonna smell like bud
Reverse air ducts. They fucked me over the only time I got caught, don't do it. Most modern houses have them.