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Horizontal Circulation Fans

Using circulation fans in conjunction with your ventilation system is a great way to keep air flowing throughout your greenhouse while reducing the amount of hot air and humidity within the structure. Gothic Arch Greenhouses offers a wide selection of circulation fans to help you achieve optimum growing conditions for your plants and flowers.

Horizontal Air Flow is Best for Greenhouse Air Circulation. it was common to find a 10°F to 15°F difference in nighttime temperature between the opposite ends of greenhouses.

When choosing greenhouse circulation fans, consider the following

  • The cubic footage of your greenhouse
  • The outdoor climate in your area
  • Your greenhouse frame

Why circulation is important

One of the most important accessories for a greenhouse, circulation fans are often used to move air throughout naturally ventilated structures where venting is minimal. Circulation fans provide horizontal airflow (HAF) which is best for greenhouse circulation. These fans push the air in your greenhouse continuously causing mass air movement. Aside from improving ventilation, circulation fans have multiple benefits. They help promote healthy plant growth by preventing stagnant air, which can cause fungus and disease to develop. Because they keep the air moving, there are no “hot” or “cold” spots; the temperature is uniform and consistent. In addition to being critical for your plants to grow, fresh, moving air simulates outdoor winds to make plant cell walls stronger resulting in more vigorous plants that produce more fruit. Moving air facilitates pollination as well. Circulation fans eliminate air stratification, equalize greenhouse temperatures, reduce moisture condensation, improve carbon dioxide utilization and carry low operating costs.

Determine your cubic footage

The cubic footage of your greenhouse will determine the size of the fans needed to cool and ventilate your greenhouse properly. To determine this, multiply the length, width, and height of your greenhouse. This is the optimal exhaust fan CFM (Cubic Feet per Minute) rating for your greenhouse. A fan this size will exchange the air in your greenhouse at least once per minute which is recommended for the healthiest growing conditions for your plants. Our circulation fans come in a range of sizes from 12 inches to 36 inches. You may also choose between stationary wall-mounted fans, oscillating wall-mounted fans, and clip-on fans depending on your cooling needs. Optional misting systems are also available if you require additional cooling.

To set up fans in your greenhouse, you will need to evaluate it to make sure the frame and the covering can support the weight of the fan. Two or more small fans are more efficient than one large fan in a greenhouse with weight restrictions. Some additional framing may be required to mount the fan. Our experts will help determine the airflow solutions that are right for your particular greenhouse’s needs. Give us a call today at 1-800-531-4769.