Direct Fired & Indirect Gas Fired

Direct Fired

The burner is fired directly into the air stream where the products of combustion mix with the recirculated air; the load is subjected to the products of combustion.

Indirect Fired

The burner is fired into a Radiant Tube type heat exchanger; the products of Combustion do NOT come in contact with the recirculated air or the products within the work chamber.

Indirect Gas