Humidity Control
Humidity control gear for grow tents and rooms: smart humidifiers and dehumidifiers from Quest, AC Infinity and Vivosun that hold your RH — and your VPD — exactly where your plants want it.
Humidity Control That Holds Your Grow in the Sweet Spot
Serious Dehumidifiers, Small Tents to Full Rooms
From the compact Quest 70 up to the Quest 700, plus Vivosun's AeroDrain D12 and AC Infinity's Hydrone 5, there's a dehumidifier here sized for every grow space. Pulling excess moisture is the fastest way to shut down mould, mildew and bud rot risk in flower.
Smart Humidifiers With App and VPD Control
AC Infinity's Cloudforge series and Vivosun's AeroStream range run ultrasonic misting with app control, and models like the AeroStream H05 use an external probe to target VPD directly — set your range once and let the unit hold it.
Humidity Control Advice From Growers Who Use This Gear
We're growers first, retailers second. Fourteen years of running rooms in Tasmania means we'll tell you straight whether you need a $100 humidifier or a Quest — and everything ships fast from Australian stock.
Dial in the rest of your climate: temperature control, environment controllers, grow room monitors and the full grow room environment control range.
FAQs
What humidity level should a grow tent be?
Seedlings and clones do best at 65–75% RH, vegetative growth at 50–70%, and flowering at 40–50%. Dropping RH in late flower is the single biggest thing you can do to protect buds from rot.
Do I need a humidifier or a dehumidifier?
Run a hygrometer for a week first. Tents in veg usually run too dry and need a humidifier; sealed rooms and anything in late flower almost always need a dehumidifier.
Can these units connect to a grow room controller?
Yes. The AC Infinity units run on the UIS platform and the Vivosun smart range connects to the GrowHub app ecosystem, so your humidity gear can respond automatically to live RH readings.
Welcome to The Grow Guys
We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.
FAQs
Calculated at checkout by weight and destination. Free shipping over $499*.
Order by 2pm and it ships the same business day from Invermay, Tasmania.
500+ products across 40+ brands, every one filtered through 14 years of real growing experience. Shipping Australia-wide.
30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.
Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.