Optimum greenhouse ventilation requires a lot of attention when planning the construction. Proper ventilation means that a home-made plant house can never have too many windows. Poor ventilation not only harms plant health, it also significantly reduces yields.

A greenhouse needs to be well ventilated

Ventilation and continuous air circulation are two particularly important factors when growing plants under glass or foil. In the commercial cultivation of vegetables and crops, a greenhouse ventilation is aimed for, the one 20 to 50 air changes per hour allows. Recreational gardeners rarely achieve such peak values, even if they ventilate properly.

Proper ventilation is not only important in summer

Even in winter, indoor temperatures in greenhouses can rise to undesirable mid-summer levels that need to be regulated by effective greenhouse ventilation. The air exchange in the greenhouse is essentially via:

  • Windows and additional hatches or ventilation slots:
  • doors (if possible one on each gable end);
  • additional technical devices for ventilation and air circulation (collectors, ventilation automats and fans);

Basic equipment in prefabricated houses more than poor

In practice and when it comes to proper ventilation, the self-built greenhouse plays all its trump cards. If you consider that many prefabricated house sets in the middle price segment only offer one or two ventilation windows, it becomes very clear that the rearing success for most greenhouse plants will remain well below expectations. recommend professional breeders, that at least 25 percent of the floor area of greenhouses can be opened by suitable devices would have to leave if value is actually placed on correct ventilation.

Greenhouse ventilation must be planned generously

For technological reasons, installing additional ventilation windows in the roof after final assembly is very difficult. Therefore, as many windows should be planned from the outset as the structural analysis and type of construction permit. For optimal greenhouse ventilation, every second window must also be placed so that it can be opened and closed in the opposite direction. In greenhouses that are freestanding and exposed to strong winds, it is best to mount the windows in such a way that they can all be opened in the lee.

Blinds or ventilation windows instead of panes of glass

The advantage of this greenhouse ventilation is obvious: These practical ventilation windows have small, movable glass slats that be angled manually or automaticallyto allow additional air to flow in. Your disadvantage: You can only get the slats completely tight in winter if the mini-windows are masked with additional bubble wrap.

tips

In extreme temperatures, greenhouse ventilation helps if at least a short draft can be generated. An additional window on the gable wall opposite the door is a particularly practical solution for this.

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Garden design