What is the difference between a semi-closed and a fully closed greenhouse?

A semi-closed greenhouse combines mechanical ventilation with limited natural ventilation options. A fully closed greenhouse has no roof vents and relies entirely on air conditioning. KUBO’s Ultra-Clima® is a semi-closed system that provides optimal climate control without the high costs associated with fully closed climate systems.

How much energy can I save with a semi-closed greenhouse?

Research shows energy savings of up to 18.5% compared with conventional greenhouses. The exact savings depend on the location, crop, heating system and energy sources. KUBO’s Ultra-Clima® also achieves more than 25% lower CO₂ emissions per kilogram of produce.

Which crops are suitable for a semi-closed greenhouse?

Semi-closed greenhouses are highly suitable for fruiting vegetables such as tomatoes, peppers and cucumbers, as well as ornamental crops and specialty crops. KUBO’s Ultra-Clima® technology is optimised for five to six crop types that together account for 95% of the fruit and vegetable market.

How does positive pressure affect crop protection?

Positive pressure of 10 to 20 pascals causes air to flow outwards when doors are opened. This makes it more difficult for insects and spores to enter. KUBO’s Ultra-Clima® system effectively keeps pests out and significantly reduces the need for chemical interventions.

Can I use residual heat in a semi-closed greenhouse?

Absolutely. Semi-closed systems work very well with low-grade heat at around 40°C. This creates opportunities to use residual heat from industrial processes or power plants. KUBO has completed projects in which these low-cost heat sources significantly reduce energy costs.