Impianti e ricambi per il riscaldamento e il condizionamento di ambienti

Fan Heating Systems for Greenhouses

The Aerferrisi system has in greenhouses an ideal application field; in fact, it is not sufficient to provide a greenhouse with a simple heating system, but it is necessary to provide an actual air treatment system, otherwise the hoped-for production results will not be obtained, but one would only get insufficient makeshifts. In fact, the purpose of the system is not to save the production from the cold, but to substantially increase the greenhouse’s production. The greenhouse must therefore be conditioned! This term should not scare you, it should not be considered as a synonym for an expensive system, but simply for a seriously studied system with suitable and well-installed machines. A conditioned environment is one that reproduces the ideal conditions for that particular cultivation, so it is easy to understand that, to have the maximum yield from the greenhouse, it is necessary to have a system that can adapt to the vital cycle of the cultivated product. Each cultivation, in fact, requires specific temperature, humidity, and air change characteristics; these three factors are not always required at the same time, and their values vary within ranges that can also be wide and change in 24 hours, because in a greenhouse it is necessary to reproduce the climate variations between day and night, as it happens in nature. In fact, what is the night for? To provide a pause to the vital cycle and let the organism rest; if the earth were kept in the same conditions for 24 straight hours, a stress would be provoked in the cultivated plants, while maintaining two regulations – day and night – will allow to regulate the continuity of production. The purpose of a greenhouse is in fact to guarantee, in adverse climatic seasons, the reproduction of the most suitable climate; obviously, by playing with the automated equipment, it will also be possible to force production in particular periods of time, accelerating the flowering or the ripening, or, on the contrary, by slowing it down as desired. The possible situations are many: large greenhouses with a constant temperature at +23°C, with humidification and a slight air change for the peppers; or a temperature of about +18°C, to be maintained also in the summer if one wants to continue harvesting, with such high humidity that it cannot be obtained with humidifiers but only by wetting the ground, and air change up to 10 times the volume of the environment, to recreate the life conditions in the open air for the cultivation of mushrooms. Greenhouses for tropical flowers require about 28°C, with a 60% humidity, and air change. In any case, a portion of air must be taken from outside to guarantee the air changes. Like people and animals, also vegetables, when forced to live in confined areas, suffer from stagnant and stale air, with damages to their growth, flowering, and fruit production. The air taken from the outside also helps to lightly pressurize the environment, thus avoiding air draught intruding from chinks and causing thermic shocks to plants with ensuing economic damages. Our machines filter all the air they treat before letting it go through the heat exchange coil that will heat it. The subsequent step involves humidification and thus the ventilating section that provides for the air inlet into the greenhouse. All required functions are maintained automatically. The operators must only set the data they feel most suitable at the moment for that particular growth phase. Also, it must not be forgotten that the effect of ventilation carries out its beneficial influence, allowing the air change, thus reducing overheating in the summer, spring and autumn. In fact, if the greenhouse’s heating process is helped by the sun heat in the winter, it can also accumulate excessive heat in the warmer seasons or even in some winter days. This overheating can be mitigated with extreme regularity only by an air system, keeping uniform temperatures also after sunset, when the effects of the sun’s irradiation cease and temperatures can drop extremely fast.


Aerferrisi srl   Via Vittime di Bologna, 14 - 10156 Torino - Tel. 011/2740283 Fax 011/2740284   P.I. 00501690010