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Free Shipping on most orders over $175 | Sales Tax in NJ only

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
Sold out
MrCool 2 Zone 18K BTU mini-split showing two 9K BTU air handlers with Grow Light Central branding.
Complete MrCool 2 Zone DIY mini-split kit with two air handlers, condenser, remotes, smart controller, and lines.
$2,619.00 - $2,619.00
$2,619.00
$2,619.00 - $2,619.00
$2,619.00

MRCOOL 2 Zone 18K BTU (9K+9K) 24 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Easily heat or cool two rooms with smart zoning, quiet performance, and DIY setup that requires no special tools. The MRCOOL DIY Multi-Zone 18,000 ...

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$2,619.00 - $2,619.00
$2,619.00
$2,619.00 - $2,619.00
$2,619.00
MrCool 2 Zone 27K BTU (9K+18K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
Complete MrCool 2 Zone DIY mini-split kit with two air handlers, condenser, remotes, smart controller, and lines.
$3,563.00 - $3,563.00
$3,563.00
$3,563.00 - $3,563.00
$3,563.00

MRCOOL 2 Zone 27K BTU (9K+18K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Heat or cool large and small rooms with smart zone control, whisper-quiet comfort, and simple DIY installation. The MRCOOL DIY Multi-Zone 27,000 BT...

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$3,563.00 - $3,563.00
$3,563.00
$3,563.00 - $3,563.00
$3,563.00
MRCOOL DIY 2-Zone 36K BTU Ductless Mini Split with 18K and 12K Air Handlers for Efficient Heating and Cooling in Dual-Room Grow Setups
Complete MrCool 2 Zone DIY mini-split kit with two air handlers, condenser, remotes, smart controller, and lines.
$4,163.00 - $4,163.00
$4,163.00
$4,163.00 - $4,163.00
$4,163.00

MRCOOL 2 Zone 36K BTU (12K+18K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Cool or heat large zones with whisper-quiet performance, smart control, and a DIY install that skips the HVAC tech. The MRCOOL DIY Multi-Zone 36,00...

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$4,163.00 - $4,163.00
$4,163.00
$4,163.00 - $4,163.00
$4,163.00
MRCOOL DIY 2-Zone 48K BTU Mini Split Air Conditioner and Heat Pump with 36K and 12K Indoor Units for Large Grow Rooms
Complete MrCool 2 Zone DIY mini-split kit with two air handlers, condenser, remotes, smart controller, and lines.
$5,198.00 - $5,198.00
$5,198.00
$5,198.00 - $5,198.00
$5,198.00

MRCOOL 2 Zone 48K BTU (12K+36K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Control temps in extra-large spaces with quiet comfort, dual zones, and a simple install that skips HVAC pros. The MRCOOL DIY Multi-Zone 48,000 BTU...

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$5,198.00 - $5,198.00
$5,198.00
$5,198.00 - $5,198.00
$5,198.00
MRCOOL DIY 3-Zone 18K BTU Mini Split HVAC System with Triple 6K Air Handlers for Precision Climate Control Across Multiple Grow Zones
MrCool 3 Zone Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$2,926.00 - $2,926.00
$2,926.00
$2,926.00 - $2,926.00
$2,926.00

MRCOOL 3 Zone 18K BTU (6K+6K+6K) 23.9 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Compact and efficient comfort for three small zones with DIY setup, smart control, and ultra-high 24 SEER2 rating. The MRCOOL DIY Multi-Zone 27,000...

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$2,926.00 - $2,926.00
$2,926.00
$2,926.00 - $2,926.00
$2,926.00
MrCool 3 Zone 27K BTU (9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 3 Zone Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$3,696.00 - $3,696.00
$3,696.00
$3,696.00 - $3,696.00
$3,696.00

MRCOOL 3 Zone 27K BTU (9K+9K+9K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Control comfort in three zones with smart features, quiet operation, and simple DIY install that skips the HVAC bill. The MRCOOL DIY Multi-Zone 27,...

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$3,696.00 - $3,696.00
$3,696.00
$3,696.00 - $3,696.00
$3,696.00
MrCool 3 Zone 36K BTU (18K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 3 Zone Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$4,538.00 - $4,538.00
$4,538.00
$4,538.00 - $4,538.00
$4,538.00

MRCOOL 3 Zone 36K BTU (9K+9K+18K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Control comfort in three rooms with smart zoning, quiet performance, and easy DIY install—no HVAC tech required. The MRCOOL DIY Multi-Zone 36,000 B...

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$4,538.00 - $4,538.00
$4,538.00
$4,538.00 - $4,538.00
$4,538.00
MrCool 3 Zone 48K BTU (24K+12K+12K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 3 Zone Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$5,571.00 - $5,571.00
$5,571.00
$5,571.00 - $5,571.00
$5,571.00

MRCOOL 3 Zone 48K BTU (12K+12K+24K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Cool or heat three large zones with whisper-quiet control, smart features, and tool-free DIY installation at home. The MRCOOL DIY Multi-Zone 48,000...

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$5,571.00 - $5,571.00
$5,571.00
$5,571.00 - $5,571.00
$5,571.00
MrCool 3 Zone 54K BTU (18+18+18) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 3 Zone Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$6,602.00 - $6,602.00
$6,602.00
$6,602.00 - $6,602.00
$6,602.00

MRCOOL 3 Zone 55K BTU (18K+18K+18K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Heat or cool three large zones with smart control, quiet comfort, and tool-free DIY installation that cuts HVAC costs. The MRCOOL DIY Multi-Zone 55...

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$6,602.00 - $6,602.00
$6,602.00
$6,602.00 - $6,602.00
$6,602.00
MrCool 4 Zone 36K BTU (9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 4 Zone 36K BTU (9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$4,671.00 - $4,671.00
$4,671.00
$4,671.00 - $4,671.00
$4,671.00

MRCOOL 4 Zone 36K BTU (9K+9K+9K+9K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Quietly cool or heat four rooms with smart control, energy savings, and an easy install—no HVAC tools or techs needed. The MRCOOL DIY Multi-Zone 36...

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$4,671.00 - $4,671.00
$4,671.00
$4,671.00 - $4,671.00
$4,671.00
MrCool 4 Zone 48K BTU (12K+12K+12K+12K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 4 Zone 36K BTU (9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$5,984.00 - $5,984.00
$5,984.00
$5,984.00 - $5,984.00
$5,984.00

MRCOOL 4 Zone 48K BTU (12K+12K+12K+12K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Heat or cool four large rooms with smart zone control, ultra-quiet operation, and easy no-tech DIY installation. The MRCOOL DIY Multi-Zone 48,000 B...

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$5,984.00 - $5,984.00
$5,984.00
$5,984.00 - $5,984.00
$5,984.00
Diagram of MRCOOL 5 DIY Multi-Zone System with BTU ratings totaling 36K.
MrCool 5 Zone 48K BTU (12K+9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$5,135.00 - $5,135.00
$5,135.00
$5,135.00 - $5,135.00
$5,135.00

MRCOOL 5 Zone 36K BTU (6K+6K+6K+9K+12K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Control five rooms independently with efficient zoning, quiet comfort, and an easy install that skips costly HVAC labor. The MRCOOL DIY Multi-Zone ...

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$5,135.00 - $5,135.00
$5,135.00
$5,135.00 - $5,135.00
$5,135.00
MrCool 5 Zone 48K BTU (12K+9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
MrCool 5 Zone 48K BTU (12K+9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$6,045.00 - $6,045.00
$6,045.00
$6,045.00 - $6,045.00
$6,045.00

MRCOOL 5 Zone 48K BTU (12K+9K+9K+9K+9K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Heat or cool five rooms with efficient zoning, quiet comfort, and an easy install that skips costly HVAC labor. The MRCOOL DIY Multi-Zone 48,000 BT...

View full details
$6,045.00 - $6,045.00
$6,045.00
$6,045.00 - $6,045.00
$6,045.00
Diagram of MRCOOL 5 DIY Multi-Zone System with BTU ratings totaling 55K.
MrCool 5 Zone 48K BTU (12K+9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool
$6,875.00 - $6,875.00
$6,875.00
$6,875.00 - $6,875.00
$6,875.00

MRCOOL 5 Zone 55K BTU (6K+6K+9K+12K+18K) 22 SEER2 Ductless Heat Pump DIY 5th Gen

MRCOOL

Control five rooms independently with efficient zoning, quiet comfort, and an easy install that skips costly HVAC labor. The MRCOOL DIY Multi-Zone ...

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$6,875.00 - $6,875.00
$6,875.00
$6,875.00 - $6,875.00
$6,875.00
Close-up shot of the outdoor unit of the MRCOOL DIY Ductless Mini Split Air Conditioner.
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.
Deals on 2+ units
$2,599.00
$2,599.00 - $2,599.00
$2,599.00
$2,359.00
$2,359.00 - $2,359.00
$2,359.00

MRCOOL DIY 12K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

MRCOOL

Effortless DIY install, smart control, and R-454B efficiency for heating and cooling rooms up to 550 sq ft all year long. Take total control of you...

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$2,599.00
$2,599.00 - $2,599.00
$2,599.00
$2,359.00
$2,359.00 - $2,359.00
$2,359.00
Save $240.00 Save $0.00
Close-up shot of the outdoor unit of the MRCOOL DIY Ductless Mini Split Air Conditioner.
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.
Deals on 2+ units
$3,599.00
$3,599.00 - $3,599.00
$3,599.00
$2,909.00
$2,909.00 - $2,909.00
$2,909.00

MRCOOL DIY 18K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

MRCOOL

Heat and cool up to 750 sq ft with R-454B efficiency, app + voice control, and zero-hassle DIY installation in hours. Upgrade your home’s heating a...

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$3,599.00
$3,599.00 - $3,599.00
$3,599.00
$2,909.00
$2,909.00 - $2,909.00
$2,909.00
Save $690.00 Save $0.00
Close-up shot of the outdoor unit of the MRCOOL DIY Ductless Mini Split Air Conditioner.
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.
Deals on 2+ units
$3,699.00
$3,699.00 - $3,699.00
$3,699.00
$3,329.00
$3,329.00 - $3,329.00
$3,329.00

MRCOOL DIY 24K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

MRCOOL

DIY install in hours with R-454B refrigerant, smart control, and year-round comfort for rooms up to 1,000 sq ft. The 5th Generation MRCOOL DIY 24K ...

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$3,699.00
$3,699.00 - $3,699.00
$3,699.00
$3,329.00
$3,329.00 - $3,329.00
$3,329.00
Save $370.00 Save $0.00
Close-up shot of the outdoor unit of the MRCOOL DIY Ductless Mini Split Air Conditioner.
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.
Deals on 2+ units
$4,299.00
$4,299.00 - $4,299.00
$4,299.00
$3,769.00
$3,769.00 - $3,769.00
$3,769.00

MRCOOL DIY 36K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

MRCOOL

Heat and cool up to 1,500 sq ft with smart control, R-454B efficiency, and tool-free DIY install in just a few hours. Upgrade your home's climate c...

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$4,299.00
$4,299.00 - $4,299.00
$4,299.00
$3,769.00
$3,769.00 - $3,769.00
$3,769.00
Save $530.00 Save $0.00
Close-up shot of the outdoor unit of the MRCOOL DIY Ductless Mini Split Air Conditioner.
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.
Deals on 2+ units
$2,899.00
$2,899.00 - $2,899.00
$2,899.00
$2,329.00
$2,329.00 - $2,329.00
$2,329.00

MRCOOL DIY 9K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

MRCOOL

Heat and cool rooms up to 400 sq ft with smart control, R-454B efficiency, and no HVAC pro needed for install. Enhance your home’s heating and cool...

View full details
$2,899.00
$2,899.00 - $2,899.00
$2,899.00
$2,329.00
$2,329.00 - $2,329.00
$2,329.00
Save $570.00 Save $0.00

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.