Heating is required to maintain the ideal climate in the greenhouse during cold periods, it also promotes crop growth, heating systems require fuel to heat the air or the water and it can be done also through gas, electricity, coal or diesel / oil. 

The heating system is designed to achieve as even a temperature profile as possible throughout the greenhouse having into account heat released from other systems like the grow lights.

In hot air heating system, hot air is distributed through the greenhouse via heating ducts, polythene tubing with exit vents that can be placed under the growing gutters or above.

Hot water heating systems has several components that can be installed in a greenhouse depending on climate conditions and greenhouse type:

• Gable heating
• Pipe rail heating
• Snowmelt heating
• Vegetation heating
• Table heating

Hot water heating system design includes the boiler room, burners, heating transport network and heat storage tank, heat storage tank is used as a buffer for warm water and increases the efficiency of the heating system.

Another source for heating is the combined heat and power system that can be used to generate power and heat, heat generated from CHP can be stored when not needed in the buffer hot storage tank for later on use.