ClearSign Technologies Corporation announced the receipt of two purchase orders to complete the detailed engineering of burners for the fitting of two additional process heaters in a California refinery for a total of four burners. These orders follow the recent successful installations of two multi burner heater orders at the customer's refinery site. Like previous orders, this initial engineering is anticipated to be followed by purchase orders for the manufacture and supply of burners.

This California refinery is an early customer of the Company and has ongoing experience with the operation and performance of ClearSign's burner technology. The supply of ClearSign's technology helps the refinery continue to meet California's clean air goals and go beyond established emissions limits to further reduce their environmental footprint.