Greenhouse Ventilation

Fluid ventilation within a greenhouse is possible because of a combination of roof vents, side vents and (of course) the inside/outside door. When constructing (or purchasing) a greenhouse, airflow within the greenhouse is, by far, one of the most important aspects to consider.

Low-level ventilation is essential if you are trying to produce plants with dense foliage at ground level (tomatoes for example). The heat levels must be consistent as well as airflow from the fans. You must avoid stagnant air inside your greenhouse at all costs, as it will undoubtedly bring problems such as mildew on the leaves of your plants or the fruit on your trees.

Advice on Vents

Manufacturers generally supply the appropriate number of roof vents in each separate model of greenhouse. It is important to remember, the main function of a vent is to permit the warmest air to escape the greenhouse.

Side vents also offer several different options, and you must be careful which type you choose. One type of side vent offered by some of the bigger manufactures is the top hinged vent. These are a popular alternative. The main problem with most side vents is that, when open, they protrude awkwardly from the side of the greenhouse. This makes them dangerous to people who are walking the perimeter, and there are plenty of greenhouse gardeners with the battle scars to prove it! A better alternative would be a Louvered vent.

Solar Powered Vent Openers

Automatic openers are an absolute must when it comes to roof ventilation, though automatic openers are available for side vents as well. Automatic openers fitted to roof vents can help to easily overcome the problems of rapidly changing weather conditions that can catch you off guard and ruin months worth of effort, especially during the early months of Spring.

The first few months of spring can be especially harsh. An unventilated (or poorly ventilated) greenhouse can bake young seedlings and wilt the blooms and blossoms of otherwise beautiful plants. Roof vent openers are highly recommended, but you should be careful when making your purchase. Do some homework and save yourself from a later headache. Be cautious of cheap imports, there are plenty on the market and they can be unreliable.

Understanding the ins and outs of greenhouse fans, heating, and ventilation basics can help you be the best gardener around, all year long.