When I first started growing, i was concerned about no odor or low odor. After 6 years of growing ive learnwd to trust and believe in proper ventilation. If your fans and filter and exhausting are proper, you can grow the funkiest of the funk with not to much worry. The problem Ive come across is trying to be stealthy and controling odor. Fans make noise!! If you are trying to keep your grow a secret in your home, you have to ask yourself if you can run a fan 24/7 without raising eybrows. If not, definitely stay with low odor strains. Another trick I use is I keep my funky grows more for the winter when no one is outside and the air is extremely cold. That way incase some odors creep outside no one will smell it. Also if you can, vent your exhaust upwards. I vent into the attic of a newer 2 story home that has multiple roof vents. Vapor and heat rise.