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Ventilation Explained

Can Fan 125
Can Filter 125

Ever wonder why the wind blows or even more importantly:

What would happen if it didn’t?

The effect can be seen in a garden lacking proper ventilation. Stale air, humidity issues, disease, heat…should I keep going? Proper ventilation is so important in horticulture and is the key to growing quality plants indoors or via a green house. First let us discuss humidity and temperature.

Humidity is a balance between the water vapor present and the amount actually supported at that given temperature. As the air gets colder the humidity climbs and inversely as the air heats up the humidity decreases. This occurs because at colder temperatures the ability to retain water vapor in the ambient atmosphere of your garden decreases. At 100% humidity the water vapor condenses and releases excess moisture. Indoor gardens and green houses most often function best between 40 and 60% humidity levels.

Temperature is also a very important part of your indoor garden or green house.

Most indoor gardens and green houses thrive from 68 to 85 Fahrenheit. At hotter temperatures plants use less fertilizer and drink more water due to moisture loss. CO2 levels should also be raised to 1500ppms, especially if the temperature is above 78 F or fresh air is not continuously vented in. The use of air or water cooled light reflectors, exhaust fans, the integration of CO2 and if needed, an air conditioner can significantly improve any garden by narrowing the temperature to the plant’s ideal level.

To combat temperature or humidity level problems a variety of atmospheric controllers are available to link air conditioners, dehumidifiers, humidifiers, heaters, co2 devices, exhaust fans and oscillating fans together into one fully functional grow room. Devices are available to control from as little as just an exhaust fan up to lights, hydroponic pumps, fans and the above mentioned equipment.

A lack of proper ventilation leads to warm stale air inside your garden creating the perfect breeding ground for diseases and pest problems.

Oscillating fans should run 24 hours a day ensuring that air is disturbed preventing the chance for diseases to build up on leaves. Air can be constantly or periodically purged from your room via ventilation fans. Special care should be placed on intakes into your garden as to not bring in diseases and pests from outside. Carbon filters are excellent tools, cleaning the outside air and removing toxic air born chemicals and pathogens before allowing it into your room.

For more indoor,outdoor, and hydroponics information, please visit San Diego Hydroponics & Organics website.

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