Direct Fired Vs Indirect Fired Heaters

Direct fired heaters are both more efficient and less expensive than indirect fired heaters.

Direct fired vs indirect fired heaters.

Indirect fired heaters. The two most common sources are direct and indirect fired heaters. Consider the size of your space and the amount of ventilation the area has. If you re working in a large or well ventilated space a direct fired heater should be perfect.

Keep your budget in mind as well. Built in thermostats almost all indirect fired heaters use a thermostat. However there are some cases where an indirect fired heater is the better choice. Often referred to as a torpedo or salamander heater these are open flame direct fired heaters and offer greater fuel efficiency than their indirect fired friends.

Having a thorough understanding of all of the differences between these two heater types will ensure you choose the optimal solution for each project. Direct fired heaters can operate in areas with temperatures as low as 30 degrees fahrenheit. The burner is fired into a heat exchanger. In planning a new hvac project one of the main criteria after determining your specific heating requirements is determining your heat source.

100 of the fuel consumed is converted to heat. As the name suggests a direct fired heater forces air directly through its burner to generate heat. If you re working in a small and enclosed room an indirect fired heater will work best. Some negative aspects about indirect fired heaters are.

Learn more about the construction drying options that are available to you. Below is a diagram of a direct fired air heater. Third the indirect fired air heater has a thermal efficiency lower than that of a direct fired burner where a direct fired burner is 100 efficient because it combusts directly into the process air an indirect fired heater is typically in the range of 90 to 95 depending on the heat recovery equipment installed to boost the thermal efficiency. Indirect fired means that the air is heated indirectly.

Indirect fired heaters emit 100 clean and dry air and can be used in tightly sealed spaces. Direct fired heaters are both more efficient and less expensive than indirect fired heaters.