Calculating pad and fan requirements
The effectiveness of a pad and fan system will not only depend on the design, but also on the wet bulb temperature outside the greenhouse....
Tag Archives: Greenhouses
Lime – a cheap way to reduce greenhouse temperatures
Cooling a greenhouse can be just as expensive as heating, well almost. There are some very practical methods that you can use to save money. One...
Insect screens in greenhouses – effective biological control
Insect screens or thermal screens are designed to reduce heat in summer and increase temperatures during the night, but also to reduce the number of insects entering the...
Thermal screens greenhouse cooling – are they effective
Heat is always a problem in greenhouses during summer months and even during winter in some areas. High temperatures reduce yields, quality and increases pest...
Cooling a greenhouse with evaporative pad-and-fan
Pad-and-fan systems, also called evaporative pad-and-fan systems, is the most common method of cooling a greenhouse in warm weather regions. Although not optimal, it is better...
Cooling a greenhouse with fogging nozzles
Many growers have tried reducing temperatures (cooling) with fogging nozzles. The concept of spraying the air with microscopic water droplets which absorb the heat in the...
Natural ventilation in humid regions.
Ventilation of greenhouses in humid tropical areas presents the grower with a complete new set of problems. There are various methods available but none have...
Natural ventilation of single span tunnels in arid regions.
Arid regions are characterized by low rainfall, low humidity and high temperatures during summer. The largest problem is temperature during the day time inside the...
Which cladding should be used for greenhouses
Solar radiation is the most important factor affecting plant growth. Without light plants will not grow. Plants require a very narrow spectrum of solar light...
Greenhouse structure – what works
There are a huge number of types of greenhouse structures available. The structural design will mainly depend on various factors such as: Crops that will...