Odour Control Over Months

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Carbon filters have a service life measured in months, and a sixteen week flower will exhaust a cheap one before harvest arrives. Airflow rate matters too, since pushing air through too fast gives the carbon no contact time to do its work. Filter sizing advice matched to longer cycles is set out at https://hazesativaseeds.com. Haze in late flower puts out a sharp, penetrating smell that carries further than heavier indica aromas.