It is highly complicated and expensive to heat industrial and sports halls because of the great height of the ceiling and the accumulation of heat generated by the convection heating model, and is also not efficient and does not produce the desired result. In other words, it is not possible to consider implementing heating facilities such as engine rooms and fan coils, using heaters, and even local radiant heating systems as a good solution for such halls and their low thermal efficiency is not also able to produce beneficial results.
It should be noted that convection heating systems should operate at their maximum power for hours in order to heat huge spaces that have high ceiling heights so that they can heat the room temperature to some extent. As we know, hot air is light and accordingly, constantly moves upwards, and is replaced by heavy cold air on the ground. Consequently, developed countries have not employed convection models, particularly hot air heaters for many years, and it is not also recommended to use local radiant heating systems for reasons such as low thermal power (compared to Parto central radiant heating system), expensive gas piping and electrical cabling, and also the discharge of combustion induced gases in the hall space in order to heat large halls.
The radiation coefficient and the radiant surface have been extremely improved in the radiant heating system compared to the local radiant heating system – which is recognized in Iran as Garmatab. Increasing the radiation coefficient enables us to install the central radiant system at a higher height compared to the Garmatab, and its higher radiation level has the ability to heat large halls in an extremely more compressed time. This feature of the central radiant system enables us to install only a central radiant system instead of several heating machines (Garmatab) (sometimes up to 12 units) and accordingly, provide the required heating of a hall. Considering the size of industrial halls or sports halls, replacing a significant number of heating devices (Garmatab) with a radiant system indicates implementing only a gas pipeline and power branch, and consequently, a significant decline in costs.
Parto central radiant heating system is installed outside the hall and the grid of radiant pipes circulates in the hall and heats its space. The radiation level of the central radiant system is 10 times higher than the heating machines (Garmatab) and consumes fuel 50% lower than them. Also, the much higher thermal power of the Parto system can heat a large hall in an extremely more compressed time and also utilizes energy optimally.
It is more affordable to use a radiant heating system in terms of maintenance costs compared to using Garmatab because there is no necessity to provide lifts and cranes to access the devices in order to install the central system outside the hall. Alternatively, it is possible to provide easy access to the torch device by installing a simple ladder on the wall. These spaces are not employed in many cases in the cold season for the difficulty of performing the repairs due to the lack of lifts in the hall or essentially, the failure of entering the crane. It should be mentioned that it is difficult to provide lifts in many parts of the country.
The Heating, Ventilation, and Air Conditioning (HVAC) specialists pay specific attention to the central radiant system due to some significant reasons such as using energy optimally, reducing incidental costs, increasing the quality of internal heating, ease of access to the machines for service and maintenance.