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Air Conditioners

Find portable units, window models, and DIY mini split air conditioners like high-SEER MRCOOL options that cool, dehumidify, and stabilize your environment without major retrofits. Ideal for sealed cultivation rooms, these grow room air conditioners support precise temperature control (65–77°F), remove excess moisture, and reduce mold and pest risks.

For larger or commercial grows, dedicated grow-room AC systems combine cooling, dehumidification, and air circulation in one integrated package. These cool ductless air conditioners help manage vapor pressure deficits and lower energy costs when paired with proper insulation and ventilation. Select your system now to protect your harvest from heat stress.

Get a closer look at customer satisfaction by checking out our reviews.

Hydrofarm Active Air Portable Air Conditioner white remote control with black buttons for speed, temperature, mode, sleep, timer, swing, and power.
Active Air portable air conditioner with top vent and side exhaust hose. Hydrofarm cooling unit. Sold out
$589.99 - $589.99
$589.99
$589.99 - $589.99
$589.99

Active Air Portable Air Conditioner - 14,000 BTU

Active Air

Powerful, portable cooling for your grow space with smart controls, built-in dehumidification, and easy setup—no ductwork required. Beat the heat a...

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$589.99 - $589.99
$589.99
$589.99 - $589.99
$589.99
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Frequently Asked Questions

What size AC do I need for a grow room?

AC size depends on the heat load generated by your grow lights, equipment, room volume, insulation, and ambient conditions. A general rule is 25–40 BTU per square foot, adjusted for insulation and light intensity. For example, a 100 sq ft room with no windows typically needs a 5,000 BTU unit, while bigger tents (like 16×16 ft) may require 18,000 BTU units. For setups using 1,000 W lights, growers recommend roughly 4,000 BTU per 1kW of air-cooled lights (or 6,000 BTU per 1kW for non-air-cooled lights. Always size up slightly to avoid overworking the AC.

How do I cool my grow room?

Start with proper ventilation, use exhaust fans to pull hot air out and intake fans to bring fresh air in. Incorporate oscillating and clip-on fans to distribute air evenly through the canopy. Use cooler-running LED lights instead of HPS where feasible, and consider running lights at night to avoid high daytime temps. For serious heat control, add a portable, window, or mini-split AC appropriately sized to your grow space

Which is the best way to supply cool air to your grow room?

The most effective method is to cool the entire room housing the grow tent or room rather than cooling inside the tent itself. Use a dedicated AC, such as a mini-split, portable, or window unit, placed outside the tent, and feed cool air in via intake fans or ducting. Maintain good airflow so the fan pulls cool air in and exhausts warm air. Many growers prefer mini-splits in sealed rooms for quiet, efficient cooling and adjustable airflow.

Can you put an air conditioner in a grow tent?

Technically, yes, but it's not ideal. A portable AC inside the tent creates problems like negative pressure, heat from the exhaust hose, and reduced grow space. If you do it, pick a dual-hose unit that vents outside the room for efficiency. Still, the consensus is that keeping the AC outside the tent and supplying cool air into the tent is a more efficient, manageable solution.