How Clean Does Air Really Have to Be
for producing the smoothest smoking cannabis? In a word, Extremely. The volume of air, passing through a flowering room, makes even the smallest issue noticeable when smoking the flowers grown there. Wipe your finger on any surface in the facility where air is being drawn from for flowering rooms. The dust on your finger is the natural accumulation from your environment. It may be thick or thin, take a day to accumulate or a week. The point is the flowering room will be cycling this dust through at a much higher rate.
As the dust load increases, so does the harshness of the smoke. Each hit you take from the bowl adds additional harsh, as the contaminates charcoal. The ash takes on a darker hue than the color, of the same type of cannabis, grown in clean air.
Cannabis is Sticky
Dust, pollen, spores, lint, dander, fibers and more are all trapped by the surface of cannabis. None of these contaminates will increase your enjoyment, I assure you. :) Diatomaceous earth, soil particles, coco fibers, clay pebble dust and other grow related materials, all contribute to additional harshness, when improperly handled.
Fabric softener and other airborne chemicals/oils are also contaminates to avoid, because cannabis will absorb them very easily. What cannabis absorbs, tends to stay absorbed for great lengths of time. These contributions, of flavor and aroma, range from mildly to gaggingly unpleasant when burned.
Recommendations?
HEPA class air filtration methods and a little common sense. These two tools can go a long way toward keeping particles out of the air and off your flowers.
HEPA Class Filters
Inexpensive filters are as close as your local hardware store or online supplier, in the furnace filter section. There are also a number of expensive HEPA filters, designed for cultivation, which are washable and reusable. Whether you custom build with furnace filters or buy off the shelf, cutting the amount of particles in the air will increase your flower smoking quality.
Intake Location
Where you draw your air in, for your flowering room, can make a big difference. Love fabric softener and perfumed deents? Skip the laundry room and any scented rooms of the house. Have a crawlspace smelling like a musty crawlspace? If you're growing for quality, you'll skip it as an option. Hot, pine attic? Same thing. All of these areas will produce flowers which smell of these areas, and taste worse when burned.
Grow Management
Plan your tasks to help keep from creating particulates and dust in the flower room. Manage airflow to keep it away from pots of media, such as soil, perlite and coco. This will reduce the chances of particles being blown into the air, where it can be trapped by the plant.
Beneficial Insect Feces
Feces, webs, eggs and insect bodies, all stick to cannabis as well. Predatory, beneficial or destructive all species of insects leave feces and dead insect bits behind.
Personal Management
Change into lint-free, freshly laundered clothing before going in and checking on your grow. Those with long hair, you'll want to tie it up or otherwise contain it, while working on the grow. Pet hair and dander are great contaminates, be sure you leave loving on them for after your time in the grow. All kinds of pests and issues are travelers of pet hair, in addition to the hair itself being a contaminate.
Smooth and Soft
Though air quality itself cannot make fantastic quality cannabis, it's impossible to have fantastic quality without HEPA class, clean air. :)