Semi-closed glass greenhouse
A glasshouse that keeps a small over-pressure and treats ventilation as a controlled air path, not a hole in the roof.
In a semi-closed house the roof vents work together with active air handling: outside air is drawn in, tempered and distributed, while a controlled over-pressure keeps untreated air from leaking in through the envelope. The result is a climate that responds in minutes rather than following the weather.
It is the right answer where outside conditions swing hard — Gulf summers, continental winters, coastal humidity — and where the crop cannot afford a two-hour recovery after a weather front.
Configurations
Cooling-led
Evaporative cooling with pad walls, for dry heat.
Dehumidification-led
Mechanical cooling and reheating, for humid heat and coastal sites.
Hybrid
Both, switched by season, so the house is not oversized for one design day.
Structure and covering specification
| Envelope | Venlo glass, sealed roof and wall details |
| Air handling | Controlled inlet, distribution ducts, over-pressure |
| Cooling | Pad and fan, mechanical chillers or a mix, sized to the design day |
| Control | Climate computer with humidity and CO₂ strategy |
| Typical use | Tomato, pepper, cucumber, strawberry, young plants |
Values are the standard range. Final dimensions, loads and covering are fixed per project against the site's climate data.
Questions buyers ask about this family
How much cooling capacity do we need?
It is set by the design day, not the average: outside temperature, solar radiation, crop transpiration and the maximum indoor temperature the crop tolerates. We calculate it per site and show the assumption in the proposal.
Does it work without a climate computer?
No. Semi-closed control is a sequence — inlet, cooling, over-pressure, humidity — and a manual system will fight itself. The computer is part of the package, not an option.
Other families and next reads
Put this family against your site
Send the country, the area and the crop. We reply with a configuration, a preliminary layout and the questions that change the price.