Greenhouse heating is done by heating under the plants. For this reason, the heating system should be as close to the greenhouse floor as possible.

The heating system with EHP provides heating by heating the EHP and circulating it in a closed system.

The function of the water pump in the heating system is to provide the heating of the greenhouse by circulating the heated water through the pipes in the greenhouse. The water circulating in the system suffers from pressure loss due to elbow, valve and section narrowing. With the pump circulating the water in the system in the desired amount, it must also meet these head losses. At the same time, the pump is desired to operate without noise and have a long service life. In systems with EHP, pressure losses are much lower since the amount of water pipes and the amount of water in them are much less. In this way, while providing a rapid heating, less load is placed on the pump.

Placement of EHP Pipes in the Greenhouse:

With the heating system with EHP, the temperature inside the greenhouse can be kept at the desired value, and a homogeneous temperature can be achieved all over the greenhouse.

EHP pipes can be placed in the greenhouse in the following ways:

1. EHP pipes can be evenly distributed over the greenhouse floor.
2. EHP pipes can be distributed along the greenhouse walls.
3. EHP pipes can be distributed along greenhouse walls and close to the ceiling.
4. Heat distribution can be made by passing EHP pipes through the tables used in greenhouses.
5. EHP pipes can be buried in the greenhouse base soil to distribute heat.

In the distribution of EHP pipes in the greenhouse floor, the pipes are laid in the length or transverse of the greenhouse. With this type of heat distribution system, the volume that the plants cover when they are very small can be heated very well and the soil temperature rises a little. This system is especially better for greenhouses where the double row planting method is applied. EHP pipes are placed on 20-25 cm high brick or briquette supports placed between double rows. The disadvantage of this method prevents the use of machines in the greenhouse.

In the distribution of EHP pipes along the greenhouse wall, the pipes are placed parallel to the four walls of the greenhouse. The pipes should be laid with a gap between them and the wall. Although this system is suitable for machine use, homogeneous heating will not be possible in cases where the greenhouse is too wide.

In distribution systems of EHP pipes along the greenhouse walls and close to the ceiling, some of the pipes are laid parallel to the greenhouse walls, and some are laid close to the ceiling and parallel to the floor. This system can be used for heating large greenhouses. In this system, two-thirds of the pipes are arranged close to the side walls and with spaces between them along the walls. The remaining pipe is distributed evenly on the ceiling.

In systems heated with EHP pipes, the heating efficiency can be increased with fans placed in appropriate places in the greenhouse.

Another arrangement of EHP pipes is to run the pipes through the work tables in the greenhouse. The benefit of this method is that it does not obstruct the light entering the greenhouse and makes the best use of the heat. When passing pipes under the table, the table should be passed close to the surface where it is used. Thus, the soil of the pots on the table is warmed more.

EHP pipes can be placed under the ground because the pipes placed in the greenhouse prevent the operations in the greenhouses and the pipes hanging on the ceiling cause shading. Thus, the plant roots are also heated.