ONA Air Filter – Odour Control for Grow Room Ventilation (4–12 inch)

ONA Air Filters provide complete and continuous odour control for your grow room’s exhaust system. Designed to neutralise unwanted smells at the source, these filters treat the air as it’s being expelled — leaving it clean, fresh, and infused only with your favourite ONA fragrance.

Simply attach the filter to your existing ventilation system, drop in the desired number of ONA Blocks through the top hatch, and let the airflow do the rest. No need to disconnect ducting — installation and reloading are quick and hassle-free.

This clever design delivers a superb, long-lasting, and totally reliable odour elimination system for any hydroponic or indoor growing setup. As extracted air passes over the ONA blocks, odours are neutralised on contact — not masked — ensuring the air leaving your ducting smells clean and fresh.

• Powerful and continuous odour control for grow room exhausts
• Simple, portable, and easy to fit to any ventilation setup
• Uses replaceable ONA Blocks for effective odour neutralisation
• No need to remove ducting — refill from the top hatch
• Removes all stray smells quickly and permanently
• Durable build — perfect for continuous use
• Available sizes: 4", 6", 8", 10", and 12"

Why choose ONA?
ONA’s natural odour control formula has been trusted by growers for decades. Their air filters and blocks work together to destroy smells at a molecular level, not just cover them up — making them ideal for discreet, efficient grow room ventilation.

Note: ONA Blocks sold separately.