Product Overview: The RLY series fuel-fired hot air furnace burns fuel through a burner to produce high-temperature flue gas. This gas is then used to heat the air being heated by a hot air furnace equipped with enhanced heat exchange measures. After releasing its heat, the high-temperature flue gas is cooled to below 250°C and exhausted into the atmosphere by a blower. The air to be heated is sent into the hot air furnace through an optional blower, absorbs heat, and then exits at the designated temperature. When the hot air temperature reaches the upper limit, the burner automatically stops burning or switches to a low flame. When the hot air temperature falls to the lower limit, the burner reignites and resumes operation.