10 Best Air Conditioners for Greenhouses: Keep Your Plants Happy and Cool

Written by: Editor In Chief
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When it comes to keeping your greenhouse environment just right, selecting the right air conditioner is essential. You want a unit that not only cools but also manages humidity effectively. With so many options available, it can be overwhelming to find the perfect fit for your space. Let’s explore some of the best air conditioners that can help guarantee your plants thrive in a comfortable climate.

Whynter ARC-1230WN Portable Air Conditioner

If you’re looking for a powerful and efficient cooling solution for your greenhouse, the Whynter ARC-1230WN Portable Air Conditioner is an excellent choice. With a robust 14,000 BTU capacity, it effectively cools spaces up to 600 sq ft while also dehumidifying. Thanks to its inverter technology, you’ll enjoy 20% more cooling efficiency and significant energy savings. You can control it via the NetHome Plus app or voice assistants like Alexa and Google Home. Plus, its innovative dual hose design minimizes heat leakage, ensuring your plants stay happy and cool. Maintain ideal temperatures between 60°F and 86°F effortlessly!

Best For: The Whynter ARC-1230WN Portable Air Conditioner is best for those seeking an efficient and versatile cooling solution for medium-sized spaces, such as greenhouses or homes.

Pros:

  • Inverter technology provides 20% more cooling efficiency and 40% more energy savings compared to traditional units.
  • Smart control options allow for convenient operation via the NetHome Plus app and compatibility with voice assistants like Alexa and Google Home.
  • Effective dehumidification capability with a built-in system that can exhaust up to 87 pints of condensate per day.

Cons:

  • The unit’s size may be cumbersome for smaller spaces or rooms with limited installation options.
  • Initial setup may require additional time and effort, particularly when using the window installation kit.
  • While energy-efficient, the maximum power consumption of 1293W could lead to higher electricity bills in prolonged use.

Whynter Portable Air Conditioner 14,000 BTU (ARC-14S)

The Whynter Portable Air Conditioner ARC-14S is an excellent choice for greenhouse enthusiasts looking to maintain ideal temperatures for their plants. With a cooling capacity of 14,000 BTU, it efficiently covers spaces up to 500 sq. ft. Its dual hose system maximizes cooling, while the dehumidification feature removes up to 71 pints of moisture daily. Operating at a quiet 51 dBA on low, it won’t disturb your plants. Plus, it includes a washable pre-filter and an activated carbon filter for improved air quality. Awarded for its performance, this portable AC is a reliable companion for any greenhouse setup.

Best For: Greenhouse enthusiasts seeking an efficient portable air conditioning solution to maintain optimal temperatures for their plants.

Pros:

  • High cooling capacity of 14,000 BTU suitable for spaces up to 500 sq. ft.
  • Quiet operation at 51 dBA on low speed, ensuring minimal disturbance in a greenhouse environment.
  • Dehumidification feature removes up to 71 pints of moisture daily, promoting a healthier climate for plants.

Cons:

  • Weight of 73 pounds may make it less portable for some users.
  • Corded electric power source limits placement options based on outlet availability.
  • Initial setup may require more effort due to the dual hose installation and window kit.

Evaporative Air Cooler with Remote & Timer for Large Rooms

For those managing large greenhouses, the Evaporative Air Cooler with Remote & Timer is an ideal choice, delivering over 2200 CFM of cooling power. Its 2.1-gallon tank and two ice packs guarantee extended cooling without frequent refills. You’ll appreciate the whisper-quiet operation at just 30dB, perfect for peaceful nights. With 110° vertical and 80° horizontal oscillation, this cooler reaches every corner of your space. Plus, you can customize your comfort with three fan speeds and modes, including sleep mode and a 12-hour timer. It’s an efficient solution for keeping your plants—and you—cool during hot days.

Best For: Those managing large greenhouses or seeking efficient cooling solutions for spacious areas.

Pros:

  • Whisper-quiet operation at just 30dB, ensuring a peaceful environment.
  • High-capacity 2.1-gallon tank with ice packs for extended cooling without frequent refills.
  • Versatile functionality with three fan speeds and multiple cooling modes for customizable comfort.

Cons:

  • May require regular maintenance to keep the cooling pads in optimal condition.
  • Evaporative cooling is less effective in high humidity environments.
  • Not as powerful as traditional air conditioning units for extreme heat conditions.

Portable Air Conditioner 10,000 BTU (YN-10K/07I)

Designed to cool spaces up to 450 square feet, the Portable Air Conditioner 10,000 BTU (YN-10K/07I) is perfect for greenhouse enthusiasts looking to maintain ideal temperatures for their plants. With rapid cooling and 360° air circulation, your greenhouse will stay comfortable. It offers four modes: cooling, sleep, dehumidifier, and fan, ensuring you have options for any situation. The LCD touch panel and remote control simplify adjustments, while the 24-hour timer and adjustable fan speed enhance convenience. Plus, its portable design and quiet operation make it easy to use without disturbing your plants or the environment.

Best For: Greenhouse enthusiasts and individuals looking to maintain comfortable temperatures in spaces up to 450 square feet.

Pros:

  • Rapid cooling with 360° air circulation ensures effective temperature control.
  • Multiple modes (cooling, sleep, dehumidifier, and fan) cater to different needs.
  • Portable design with quiet operation allows for easy mobility and minimal disturbance.

Cons:

  • Limited to cooling spaces up to 450 square feet, which may not be suitable for larger areas.
  • Requires manual intervention for drainage in some cases, which may be inconvenient.
  • Operating noise level may be noticeable in quiet environments, despite the sleep mode option.

Portable 3-IN-1 Evaporative Air Conditioner

Looking for an effective cooling solution for your greenhouse? The Portable 3-IN-1 Evaporative Air Conditioner is just what you need. With its innovative airflow technology, it cools up to 270 sq.ft, reducing temperatures by 38-47°F. Featuring a 1.85-gallon water tank, it operates quietly and efficiently, using up to 80% less energy. You’ll love its four modes and three wind speeds, plus a 7-hour timer for hassle-free operation. Its portable design includes universal wheels and child-safe features, making it convenient for everyone. Keep your plants happy and cool with this powerful, versatile air conditioner!

Best For: Those seeking an efficient and portable cooling solution for small to medium-sized spaces like bedrooms, greenhouses, or indoor areas.

Pros:

  • Energy Efficient: Reduces power consumption by up to 80% with its brushless motors.
  • Quiet Operation: Sleep mode operates at a low noise level of 36 dB, perfect for nighttime use.
  • User-Friendly Design: Features a top-fill water tank and portable wheels for easy mobility and convenience.

Cons:

  • Limited Cooling Area: Effective cooling is limited to a maximum area of 270 sq.ft.
  • Requires Water Refill: Needs regular refilling of the water tank for optimal performance.
  • Not Suitable for High Humidity: Best used in dry environments, as its effectiveness may diminish in humid conditions.

Hessaire Portable Swamp Cooler (MC18M)

The Hessaire Portable Swamp Cooler (MC18M) stands out as an excellent choice for greenhouse owners seeking an efficient cooling solution. With a powerful 1300 CFM airflow, it covers areas up to 500 sq. ft., making it ideal for your plants. Its hi-density XeL50 media boosts cooling efficiency while saving you up to 50% on electricity costs. Operating quietly at just 53.4 dB, it won’t disturb your environment. Plus, its lightweight design and 4.8-gallon tank make it easy to move and operate. Hessaire’s trusted reputation guarantees you’re investing in a reliable, energy-efficient cooling solution for your greenhouse.

Best For: Greenhouse owners looking for an efficient, portable, and cost-effective cooling solution.

Pros:

  • Efficient cooling for areas up to 500 sq. ft. with 1300 CFM airflow.
  • Saves up to 50% on electricity costs with hi-density cooling media.
  • Lightweight design and easy operation make it portable and user-friendly.

Cons:

  • Limited coverage area may not be suitable for larger greenhouses.
  • Requires regular maintenance, such as tank filling and cleaning.
  • Performance may be less effective in extremely humid conditions.

14000 BTU Portable Air Conditioner with Remote Control

For greenhouse enthusiasts seeking efficient climate control, the 14,000 BTU Portable Air Conditioner with Remote Control is an excellent choice. It cools spaces up to 700 sq.ft., offering a temperature range of 61°F to 88°F. With its 3-in-1 functionality, you can enjoy cooling, fan, and dehumidifying modes. The smart features maintain comfort effortlessly, while the quiet sleep mode guarantees peaceful nights. You’ll appreciate the convenience of the remote control and the easy maintenance with its self-evaporation system. Plus, its portable design allows easy mobility and installation, making it a perfect fit for your greenhouse needs.

Best For: Greenhouse enthusiasts looking for an efficient and versatile climate control solution.

Pros:

  • 3-in-1 functionality: Offers cooling, fan, and dehumidifying modes for versatile use.
  • Smart features: Automatically adjusts based on room temperature for optimal comfort.
  • Portable design: Easy to move and install with wheels and a simple setup process.

Cons:

  • Requires drainage every 8 hours in humid conditions, which may be inconvenient.
  • Cooling capacity may be less effective in larger spaces nearing the 700 sq.ft. limit.
  • Noise level may be noticeable in quiet settings, even in sleep mode.

SereneLife Portable Swamp Cooler Air Conditioner

Ideal for those seeking an efficient cooling solution in various settings, the SereneLife Portable Swamp Cooler Air Conditioner combines powerful 2500 CFM airflow with 360° oscillation to guarantee extensive comfort. With its 3-in-1 functionality, you can easily switch between cooler, fan, or humidifier modes, ensuring favorable conditions for your plants. The dual ice packs enhance cooling performance, while the 8-gallon water tank and safety pump provide reliable operation. Plus, you’ll appreciate the energy-efficient design and low maintenance with a washable filter. Its portability, stylish look, and smart features like Wi-Fi control make it perfect for any greenhouse environment.

Best For: Individuals seeking an efficient and versatile cooling solution for bedrooms, living rooms, or outdoor areas.

Pros:

  • 3-in-1 functionality allows for use as a cooler, fan, or humidifier, adapting to different comfort needs.
  • Energy-efficient operation at 140W with quiet performance (≤52 dB), making it suitable for any environment.
  • Portable design with built-in handles and caster wheels for easy movement between rooms.

Cons:

  • Requires regular refilling of the 8-gallon water tank for optimal performance.
  • May not be as effective in extremely high humidity environments.
  • Limited cooling range compared to traditional air conditioning units.

Portable Air Conditioner, 4-IN-1 Ultra-Quiet Design

Searching for a versatile cooling solution for your greenhouse? The 2025 upgraded 4-in-1 Portable Air Conditioner is a perfect choice. It combines an air conditioner, humidifier, fan, and a 7-color night light, ensuring comfort year-round. With three adjustable fan speeds and two cool mist modes, you’ll enjoy revitalizing air thanks to its 1500ml water tank, providing up to eight hours of continuous mist. Plus, its ultra-quiet operation makes it ideal for sleep or focused tasks. The compact, USB-powered design allows easy use indoors or outdoors, and the remote control adds convenience for adjusting settings from a distance.

Best For: Those seeking a multifunctional cooling solution for their greenhouse, home, or outdoor activities.

Pros:

  • Versatile 4-in-1 functionality: Combines air conditioning, humidifying, fan, and night light features for year-round comfort.
  • Ultra-quiet operation: Designed for minimal noise, making it perfect for sleeping or focused work environments.
  • Portable and convenient: Compact, USB-powered design allows for easy transport and use in various settings.

Cons:

  • Limited cooling capacity: May not be sufficient for larger spaces or extremely hot climates.
  • Water tank requires frequent refills: The 1500ml tank may need to be replenished regularly for continuous mist operation.
  • Adapter not included: Requires a separate adapter for use with standard wall outlets.

Midea 10,000 BTU U Shaped Smart Inverter Window Air Conditioner

The Midea 10,000 BTU U Shaped Smart Inverter Window Air Conditioner is perfect for greenhouse enthusiasts who prioritize energy efficiency without sacrificing comfort. This unit cools spaces up to 450 sq ft while maintaining ultra-quiet operation at just 32 dBA. With over 35% energy savings and ENERGY STAR certification, it’s a smart choice for eco-conscious gardeners. Its Wi-Fi capability lets you control it remotely through the SmartHome app or via voice commands with Alexa and Google Assistant. Plus, the U-shaped design minimizes external noise while allowing fresh air intake, making it a versatile addition to your greenhouse setup.

Best For: Eco-conscious greenhouse enthusiasts looking for an energy-efficient and quiet cooling solution.

Pros:

  • Ultra quiet operation: Noise levels as low as 32 dBA ensure a peaceful environment.
  • Energy savings: Achieves over 35% more efficiency compared to traditional units, saving on energy bills.
  • Smart technology: Wi-Fi enabled for remote control and compatible with voice assistants like Alexa and Google Assistant.

Cons:

  • Limited cooling capacity: Designed for spaces up to 450 sq ft, may not be suitable for larger greenhouses.
  • Window compatibility: Requires specific window sizes (22-36 inches width and minimum height of 13.75 inches) for installation.
  • Initial cost: Higher upfront investment compared to standard window AC units.

Factors to Consider When Choosing an Air Conditioner for Greenhouse

When choosing an air conditioner for your greenhouse, you need to contemplate several key factors. Start by evaluating the cooling capacity requirements based on your space and plant needs. Don’t forget to look into energy efficiency ratings, humidity control features, portability, and noise levels to guarantee you make the best choice.

Cooling Capacity Requirements

Choosing the right cooling capacity for your greenhouse air conditioner is essential to guarantee ideal growth conditions for your plants. Start by calculating the required BTUs based on your greenhouse’s size; aim for about 20 BTUs per square foot. Don’t forget to factor in heat generated by your plants, sunlight, and equipment, as these can considerably increase your cooling needs. Assess your greenhouse’s insulation and ventilation, too—poorly insulated structures may need higher BTU ratings to maintain optimal temperatures. On peak temperature days, you might also require a higher capacity unit to combat excessive heat. Finally, consider humidity levels; increased humidity means you’ll need dehumidification capabilities alongside cooling capacity for the best results.

Energy Efficiency Ratings

Understanding energy efficiency ratings is essential for selecting the right air conditioner for your greenhouse. These ratings are typically measured in BTU (British Thermal Units) per watt, indicating how effectively the unit converts electricity into cooling power. Look for high Energy Efficiency Ratios (EER); higher EER ratings mean lower energy consumption while maintaining the same cooling output, vital for greenhouse environments. Additionally, consider the Seasonal Energy Efficiency Ratio (SEER), as higher values indicate better efficiency over the cooling season, leading to cost savings. Units with inverter technology can boost energy efficiency by up to 40% by adjusting compressor speed according to cooling needs, making them perfect for fluctuating greenhouse temperatures. Prioritizing energy efficiency can greatly reduce your operating costs and environmental impact.

Humidity Control Features

Humidity control is essential for maintaining the ideal growing conditions in your greenhouse, as excessive moisture can lead to mold and plant diseases. When choosing an air conditioner, look for models with built-in dehumidification functions that can remove excess moisture effectively—some can exhaust up to 95 pints of condensate daily. It’s vital to adjust humidity levels since most plants thrive in a relative humidity range of 40% to 70%. Consider units that utilize inverter technology, as they efficiently adapt cooling output based on temperature and humidity changes, conserving energy. Additionally, portable air conditioners with a fan mode can circulate air and reduce humidity, promoting better air quality and overall plant health.

Portability and Installation

When selecting an air conditioner for your greenhouse, portability and ease of installation play essential roles in achieving ideal climate control. Consider the size and weight of the unit, especially if you plan to move it around for seasonal adjustments. Look for models that come with window sealing kits or adjustable hoses to simplify installation and minimize heat loss. Make sure the cooling capacity suits your greenhouse’s square footage, as units are rated for specific areas. Don’t overlook energy efficiency ratings, as they can markedly affect your operating costs. Finally, opt for features like remote control or smart technology, allowing you to make adjustments easily without disturbing your plants.

Noise Level Considerations

While you might focus on cooling capacity and energy efficiency when choosing an air conditioner for your greenhouse, don’t underestimate the importance of noise levels. Excessive noise can stress your plants and disturb beneficial insects, so aim for units with lower decibel (dBA) ratings, ideally below 50 dBA. Portable air conditioners often have higher noise levels than window units, typically ranging from 36 dBA to 53 dBA. Look for modern air conditioners designed with noise-reducing technologies like insulated compressors and improved fan designs to create a serene environment. Also, don’t forget that regular maintenance, such as cleaning filters and fans, can help keep noise levels down over time, ensuring a peaceful atmosphere for your greenhouse.