
The changes in the yields of these plants as a result of carbon dioxide applications made in various ways to the plants in the greenhouse were examined. Plants need oxygen for respiration and CO2 for assimilation. It is not sufficient to explain plant development only in terms of soil-plant-water relations. The exchange of gases in the atmosphere must also be taken into account. Especially CO2 gas, which is the building block of photosynthesis, is very effective in plant development. Due to its effects on plant growth and yield, CO2 fertilization has an important place in greenhouse cultivation. It is possible to increase the yield of the plants with CO2 fertilization to be made at appropriate levels for the plants in the greenhouse.
As a result of the combustion of natural gas in the boilers, CO2 emerges in the flue gas depending on the combustion efficiency. In this flue gas, the necessary measurements (CO ratio) are made and the greenhouse is fed with PVC pipes with the help of a fan.

The main purpose of the buffer tank is to store the heat energy produced in the boilers during the daytime CO2 delivery to the greenhouses, thereby reducing the boiler water temperature. The heating water returning to the boiler at low temperature is primarily circulated through the condenser coils, thereby reducing the flue gas temperature. In this way, the cooled flue gas and the CO2 in it become ready for use in greenhouses. The flue gas and CO2 temperature are also mixed with the boiler room air in the 3-way mixing damper and brought to the final temperature that can be used in greenhouses.