Cannabis: Six Best Practices for Odor Control

TRADELABOR has more than 20 years of experience in the control and treatment of air, working with an experienced and qualified technical staff and with the most advanced technology in this area, which together guarantee the quality of the services provided.



Good HVAC systems include effective odor control strategies.

Growers who have not considered odor control as part of the design and construction build-out process have learned the hard way when nearby neighbors complain to authorities about
malodorous releases from the facility.

Local regulations will have a good deal of influence here, as some municipalities are extremely aggressive in applying punitive measures to those that violate these local statutes, resulting
in large fines and even license suspension or revocations in some cases.

Greenhouse cannabis cultivators would be smart to emphasize odor control during all phases of construction planning and construction. Surna Co-founder Brandy Keen, who consults with greenhouse growers to build out HVAC and odor control systems, recommends these six odor-control

1. Identify Sources of Odor Escape

Proactively controlling odor means making sure everything in the greenhouse is air-tight. Check
for areas where odor might escape, such as entryways and outgoing ports, and look for any cracks,
gaps, or leakage points. Insulation goes a long way toward helping to manage odor in a cannabis

2. Isolate Cannabis-Specific Areas

Design your floorplan to separate offices and common areas from cannabis areas. Create workflow
and traffic flows that also separate these two areas as much as possible. Try to keep entryways far
away from cannabis areas.

3. Manage What Is Leaving Your Facility

Filter your exhaust air at maximum cubic feet per minute and limit exhaust to only what is necessary. Exhaust air can be treated with carbon, ozone, chemical deodorizers, or natural alternatives.

4. Don’t Forget Drying and Trim Rooms

Drying and especially trim rooms are usually bigger sources of odor pollution than cultivation
spaces. They typically have high ventilation requirements due to dense occupancy during harvest,
so you have a double whammy of high terpene/odor density combined with a lot of air leaving the

5. Address Odor Control with Your HVAC Plan

Ensure your mechanical (HVAC) plan specifically addresses odor control, and ensure your mechanical engineer has the experience to design for an effective odor-control strategy: Pressurization
strategies must consider odor control. For instance, if you choose to positively pressurize cultivation spaces with no equalization in adjacent spaces, you have no control over where that air goes
(cracks, crevices, open doors).

6. Contemplate Your Recirculation Strategy

Recirculating odor control strategies are most effective when utilized at high density near critical
entrances or transition points: For instance, near entry doors, near the entrances to cultivation and
processing areas, and in hallways serving those areas.


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