absolutely... the problem some poeple make is that they fill up the room with co2, but never circulate and replace the air... huge mistake. co2 can increase yield 50%, but the air should still be exchanged every hour at the most. the sentinal CHHC1 is sweet for that cause its a meter, and only pumps in co2 to the specified level when lights are on, and kicks in the exhaust fan while killing co2 injection whenever specified