During the warm summer months, it is important to keep your greenhouse at or around your plants ideal temperature, which is approximately 80-85 degrees Fahrenheit. There are many ways to keep your greenhouse cool and you don’t have to do them all, especially at first. You might start with one or two and see how it goes for a summer season and then decide if you need to add even more cooling methods for the next growing season.
Cooling Your Greenhouse
Ways to Cool Your Greenhouse in the Summer
Exhaust Fans and Intakes
BCG Residential Exhaust & Intake Systems
10 inch: Best for 8×12 Greenhouse
- Looking for an efficient and effective way to keep your greenhouse cool and ventilated? The Canarm 10” Greenhouse Exhaust Fan Package could be a great fit for you. This package includes an exhaust fan with shutter, motorized intake shutter, and a thermostat, all designed to help you achieve optimal ventilation and temperature control.
- With a maximum airflow of 690 cubic feet per minute (CFM), this exhaust fan package is perfect for an 8×12 greenhouse. The motorized intake shutter and thermostat work together to open the shutter and turn on the exhaust fan as needed, keeping your greenhouse at the ideal temperature, and promoting cross-ventilation for healthier plants.
14 inch: Best for 16×20 Greenhouse
- This 14” Greenhouse Exhaust Fan package by Canarm includes a powerful 14” exhaust fan shutter, two motorized intake shutters, and a thermostat to regulate the temperature inside your greenhouse. With a maximum airflow of 2170 cubic feet per minute (CFM), this greenhouse exhaust fan package effectively cross ventilates your greenhouse and helps to manage temperature, humidity, and air quality for healthier plants.
- Crafted with high-quality materials, the exhaust fan and intake shutters are painted to match your greenhouse, ensuring seamless integration into your setup. The included thermostat is rated for 16 amps at 120V, and it opens the motorized intake shutters and turns on the exhaust fan when the greenhouse reaches your set temperature.
18 inch: Best for 20×20 Greenhouse
- The 18” Greenhouse Exhaust Fan Package from Canarm is a highly effective solution for greenhouse growers seeking to improve air circulation and maintain optimal growing conditions. Designed to provide maximum ventilation for greenhouses up to 20 x 20 feet in size, this package includes an 18-inch exhaust fan shutter, two motorized intake shutters measuring 24” x 24”, and a reliable thermostat for 16 amps at 120V.
- When temperatures rise in your greenhouse, the thermostat automatically opens the motorized intake shutters based on the temperature you set. This allows ing fresh air to flow in the greenhouse while the exhaust fan draws stale air out, creating a cross-ventilation effect that helps to regulate temperatures and prevent humidity buildup. Plus, the fan and intake shutters are painted to match your greenhouse, providing a seamless and professional appearance.
J&D Commercial Exhaust Intake Fans
Wall Master Exhaust Fan (36” 50” 55”)
The Wall Master Exhaust Fan from J&D Manufacturing delivers high-volume airflow with smooth, energy-efficient operation. Engineered for durability, its heavy-duty 18-gauge galvanized steel housing provides superior strength while maintaining a compact, easy-to-install design. Built for reliability, the Wall Master is a versatile solution for agricultural buildings, greenhouses, warehouses, and other demanding environments. Whether optimizing barn ventilation, enhancing greenhouse airflow, or improving industrial climate control, this exhaust fan ensures long-lasting performance and efficiency.
Typhoon with Cone and Without Cone (24” to 50”)
J&D Manufacturing’s Typhoon Slant Wall Exhaust Fan is engineered for exceptional performance, providing powerful and efficient ventilation for agricultural, horticultural, and industrial applications. Built with a heavy-gauge galvanized housing and an X-frame motor mount, the Typhoon offers unmatched durability and structural stability. Designed for efficiency and convenience, the fan features an aluminum shutter with a tie bar and galvanized shutter clips, ensuring a tight, vibration-resistant seal. With a simple twist of the clips, the shutter can be easily removed for quick cleaning and maintenance, minimizing downtime and optimizing airflow. The Typhoon Slant Wall Barn Exhaust Fan delivers high-performance ventilation with low maintenance and operating costs, making it an ideal solution for livestock facilities, greenhouses, and industrial spaces.
Motorized Intake Shutters or Without Motors (12″ to 75″)
Aluminum Power Shutters from J&D are designed to be used as an inlet to bring fresh air into your building, and may also be used for free-air exhaust. All Power Shutters include a shutter motor kit and heavy-duty frame with welded corners for extra strength. Order without a cord, or choose our pre-wired models with a 9′, 115 Volt cord for “No Electrician Needed” operation.
Commercial Thermostats (VC115 & VC115-C)
The rugged VC115 thermostat is perfect for applications that require a simple weather resistant control. It may be wired for heating or cooling to control your exhaust fan, circulation fan, power shutter, heater, or heat lamp. For plug-and-go operation, the VC115-C is pre-wired with a 115 volt, 8′ piggyback cord. The JDTMECH02 with it’s large switch contacts, provides durability and reliability.
Additional Natural Wind Information:
Natural wind gusts can play a key role with temperature inside your greenhouse. Sort of kind of like when the wind hits the side of your house it causes that side to be the “cooler side of the house”, same concept except with a greenhouse. Before you construct your greenhouse there is an area that will align with natural wind patterns.
Watering Plants Regularly:
Watering your plants regularly will keep them healthy and makes sure they don’t get stressed out from the heat. Plants absorb the water that they need and then the rest evaporates. Making sure that your plants have the right amount of water will ensure that the transpiration process takes place.
Greenhouse Internal Fans
12 inch: Green Breeze HAF Fan
Achieve optimal climate control and plant performance with the Green Breeze from J&D Manufacturing—the industry’s leading Horizontal Airflow (HAF) fan engineered specifically for greenhouse environments. Designed for maximum energy efficiency and adaptability, the Green Breeze delivers exceptional value without compromising performance. During colder months, the Green Breeze helps reduce heating costs by promoting uniform air circulation throughout the greenhouse, minimizing temperature stratification and enhancing climate consistency. When preparing plants for market, simply reduce fan speed and fine-tune the airflow direction to promote stronger stems and improve overall plant hardiness. Whether you’re looking to stabilize temperature, improve plant quality, or increase operational efficiency, the Green Breeze greenhouse fan is your all-season solution for professional growers.
18 inch: Black Indoor/Outdoor UL507 Certified Wall, Ceiling or Pole Mount Fan
J&D Manufacturing’s POW Indoor/Outdoor Fan is a rugged, three-speed, waterproof fan built for reliable performance in demanding agricultural and industrial environments. Designed for pole, wall, or ceiling mounting, it’s ideal for spaces exposed to moisture, humidity, or direct spray. Pre-wired with a 115V plug and 8-foot cord, it offers quick, plug-and-play installation. UL507-rated for wet locations, it’s perfect for barns, greenhouses, wash bays, marinas, patios, and more. Built to handle tough conditions, the POW fan can be sprayed down for easy cleaning, making it an excellent choice where dust and debris are common. Durable, versatile, and easy to maintain—this fan delivers dependable airflow wherever you need it.
18 inch: Stainless-Steel Basket Fan
J&D Manufacturing’s new 20″ Stainless Steel Basket Fan sets the standard for durability and performance in demanding environments. Designed with complete corrosion resistance in mind, every component—including the guard, propeller, motor housing, mounting bracket, and hardware—is built to withstand harsh agricultural and industrial conditions, making it an ideal solution for both barn fan and greenhouse fan applications. Engineered as a high-efficiency HAF (Horizontal Airflow Fan), this advanced air circulator delivers powerful, uniform airflow that supports optimal climate control. Whether you’re cooling livestock, maintaining consistent temperatures for plant growth, or improving air movement around sensitive equipment, this fan helps reduce condensation, dry litter and bedding, and minimize temperature stratification—ultimately lowering heating costs and enhancing animal and crop health. Versatile in its use, the Stainless Steel Basket Fan is also suitable for non-agricultural settings such as patios or workspaces, providing effective personal cooling. For even greater cooling performance, pair it with a high-pressure fogging attachment to create a fine mist for temperature and humidity control.
18 inch: JD360 Destratifier Fan
The JD360 destratification fan is engineered to efficiently balance air temperature throughout your facility by drawing down cooler, denser air from ground level and blending it with warmer air that accumulates near the ceiling. This process creates a consistent, healthier environment from floor to peak—ideal for greenhouse climate control and poultry house ventilation. Designed as a vertical, low-airspeed circulator, the JD360 is powered by J&D’s rugged, IP66-rated Gold Star Motor, backed by a 3-year warranty for peace of mind. Its maintenance-free operation and simple installation make it a smart, labor-saving investment. By reducing temperature stratification, the JD360 helps lower heating costs and enhances overall air quality for plants and livestock. Take advantage of competitive pricing and volume pallet discounts—maximize airflow performance while minimizing costs.
Shade Systems
Total Energy (10%- 90% Shade Light Transmission)
Greenhouse Applications:
- Control light intensity and total light levels
- Reduce heat in growing area
- Enhanced control over growing environment
- Additional energy savings
Greenhouse Advantages:
- High quality materials ensure high performance that lasts
- Flexible options for any budget
- Different curtain options for varying light transmission and heat retention
- Curtains are UV stabilized, pre-shrunk, and fire retardent
- Installation services ranging from supervision to full installation
- Adaptable systems for retrofit projects
Insolrall (Human and Plant Comfort at 5-10% Light Transmission)
Insolroll manufactures exterior roller shades for covering windows, decks, porches, pergolas and other outdoor patio structures under the Oasis® brand name.
All our exterior roller shade systems are designed to control heat and glare while maintaining the view of the outdoors, and are the most effective shading solution for outdoor living spaces and the outsides of windows. The benefits of solar screen shades make them a clear choice for this extension of residential and commercial window treatments.
- Reduce glare
- Reduce heat in both indoor and outdoor spaces
- Preserves your connection with the outdoors
- Motorized operation options for easy, on-demand shading
- Wide Selection of Fabric choices offer color, texture, view and performance
Custom Shade Clothes 10-90% (Grommeted Edges for Easy Zip Tie)
Shade Cloth is one of our most versatile products. You will find it an essential part of your greenhouse if you plan on growing through the summer months. It helps cut down on the temperature tremendously, keeping your greenhouse functional.
You will find our knitted Shade Cloth dependable and tough as nails, resisting breakdown and brittleness over time, unlike other brands. Featuring tough, lock-stitch construction and durable taped binding at no extra charge, grommets are also placed every 2 feet around the perimeter of your cloth. Most customers have found they can get a lifespan of 10-15 years out of their cloth as long as it is removed during the winter months.
Keeping track of your greenhouse temperatures will ensure that you have productive, strong healthy plants throughout the heat of the summer growing season. With these different ways of cooling your greenhouse, you will help prevent plant stress, pests from moving in and diseases from spreading.
Exploring effective strategies to keep your greenhouse cool and thriving during the summer season will take time, trial and error. Be sure to monitor temperatures and humidity throughout the day, at all times, to know how your greenhouse setup reacts to the constantly changing conditions of the day.
Water Cooling / EVAP Systems
QuietCOOL 18 inch: QC18DVS
- 18″ Portable Evaporative Cooler
- Direct Drive 1/4 Horsepower Variable Speed
- CFM: 3,000
- Spot Cools Area up to 900 sq.ft.
- NSN: 4120-01-507-7036
- Rotomold Housing
- High efficiency, totally enclosed 1/4 HP motor @ 120V 3.3A
- 1/5HP Submersible Pump @ 120V, 1.1A
- Total Amps: 4.4
- Total watts: 528
- Size: 28″ W x 54″ H x 25″ D
- Ship Weight: 120 lbs.
QuietCOOL 36 inch: QC36D1X
- 36″ Portable Evaporative Cooler
- Direct Drive 3/4 Horsepower Single Speed
- CFM: 12,100
- Cools Area up to 2,500 sq.ft.
- NSN: 4120-01-449-7531
- Rotomold Housing
- High efficiency, totally enclosed 3/4 HP motor @ 120V 6.76A
- 1/6HP Submersible Pump @ 120V, 5A
- Total Amps: 11.76
- Total watts: 1411.2
- Size: 61.5″ W x 63″ H x 33″ D
- Ship Weight: 300 lbs.
QuietCOOL 48 inch: QC48B2
- 48″ Portable Evaporative Cooler
- Belt Drive 1 Horsepower Two Speed
- CFM: 17,600 High – 11,300 Low
- Cools Area up to 3,600 sq.ft.
- Rotomold Housing
- High efficiency, totally enclosed 1 HP motor @ 120V 9.8A
- 1/6HP Submersible Pump @ 120V, 5A
- Total Amps: 14.8
- Total watts: 1776
- Size: 75.5″ W x 79″ H x 36″ D
- Ship Weight: 450 lbs.
Phoenix Thru Wall
- Our Commercial Coolers deliver the industry optimum fresh air with motor horsepower ranges from ¾ Hp to 7 ½ Hp to meet the most challenging design requirements. Often referred to as air washers, these units also provide filtering to induction air prior to entering workplace environments through ducts or single inlet discharge aperture. Similarly, used as air handlers without the use of water, fresh make-up air requirements in restaurant kitchens, industrial work environments and dry cleaning industries can be met cost effectively and energy efficiently.
- Our Exclusive Peblar XT surface preparation is the highest quality outdoor architectural grade finish used in the industry to date. This attractive, multi-layered bonded treatment protects the cooler against corrosion and provides years of reliable service.
EVAP WALL Available in 3 ft tall to 5 ft tall in 5 foot lengths up to 50 ft
(Custom Sizes Available)
EVAP Systems use the natural cooling process of water evaporation in conjunction with exhaust fans to provide up to 30°F of cooling for large volume buildings. Ideal for cooling greenhouses, warehouses, factories and other large facilities.
A snap together “no-leak” PVC system, including supply line, spray line and reservoir, is easy to install, operate and maintain. Water that does not evaporate is re-cycled through the pads, so no water is wasted. Comes with single or multi-stage automatic controls and center-feed and end-feed water supply.
HYDRO-Fogger | 75 pint to 200 pint
Hydrofoggers in greenhouses offer several benefits, including energy efficiency, improved plant health, and controlled environment management. They help regulate humidity, reduce plant stress, and protect against pests and diseases, leading to healthier crops and potentially higher yields.
Plant Health and Growth Benefits:
- Improved Transpiration: Hydrofoggers create a more humid environment, which can improve plant transpiration (the process of water moving through a plant).
- Reduced Plant Stress: They help prevent plant stress and wilting, especially during hot weather, by lowering greenhouse temperatures through evaporative cooling
- Enhanced Nutrient Uptake: The controlled environment also improves nutrient uptake, contributing to overall plant health.
- Reduced Fungal Diseases and Pests: Maintaining optimal humidity levels makes the greenhouse environment less favorable for fungal diseases and pests.
