Everyone will agree that a heated greenhouse has many advantages over an incessant. This is its use in the cold months of the year, and therefore the opportunity to get early seedlings and early crops of vegetables, and the possibility of obtaining second and even third yields. And if overseas cultures are grown, imported from warm edges, then the greenhouse must be drowned all year round. The choice of heating system for the greenhouse depends on its size, on the existing heating in the house and on the size of your budget. The optimal coolant in the greenhouse will be warm water, which circulates through the pipeline located inside the greenhouse or under its floor. So heat will be evenly distributed over the entire surface and heat will not quickly disappear through the external coating. The temperature of the heating of water in the pipes can be reduced with a large number of pipes in the greenhouse: they give heat for a long and slowly, but such a system also heats up slowly.You can heat the greenhouse with convectors, however, they dry the air, which is not desirable for plants, since they can hurt, but this phenomenon can be prevented by using low and uniform temperatures. The choice of heating option depends on real conditions. If the greenhouse is located near the house and is made of materials that have good thermal insulation properties, then you can arrange an air heating main from the house to the greenhouse. Hose for water to hide in the heating main channel, then the water will not freeze in winter. Gas consumption increases slightly. If it is impossible to arrange such heating, then there remains such an option as an individual heating. You can calculate the heating power according to a fairly simple formula: the area of the glazed surface in the greenhouse is multiplied by the temperature difference and the heat transfer coefficient.
If particularly accurate calculations are not needed, then the glass area is multiplied by K-7.6. When determining the temperature difference, take the required temperature inside the greenhouse and the minimum temperature of the outer air. To reduce the heating power, you need to increase the thickness of the glass or, if the covering of the greenhouse is film, then select a tank film. This will reduce energy consumption for heating. In small greenhouses with a strong coating, you can apply electric heating if constant heating is not necessary, but a temperature above 00C is maintained. In this case, a high -quality greenhouse fan, which distributes heat and safe in operation will help. You can install ribbed radiators with a length of 150 – 250 cm – they are reliable and durable, their heat is distributed evenly throughout the body, their power is 2000 watts. You can warm water in a boiler in a greenhouse, and then pump it into pipes laid along the walls or between the rows of plants using a circulation pump.
If we are talking about the benefit of financial, then the greenhouse can be connected to the existing heating system, but for this you need a powerful boiler that can maintain the necessary pressure. If the greenhouse is heated not all year round, but only at a certain time, then gas cylinders are quite suitable, and if, all the same year -round, then you will have to purchase a liquid gas tank or connect heating to the common highway. Small greenhouses can also be heated using catalyst burners having a platinum coating and a thermostatic regulatory system.
These burners have a large efficiency, so the carbon monoxide does not release. When heating the greenhouse with gas, a sufficient amount of fresh air is required. For this purpose, a exhaust system is arranged, and in order to work, oxygen is served by direct connection to the chimney or to the outer wall. A very important point is temperature control in the greenhouse and a signal device will help in this. Currently, the market is rich in models that signal if the temperature has gone beyond the specified parameters towards a decrease or increase or when the power supply has turned off.