ClearSign Technologies Corporation announced that the Company has received the concluding purchase order to proceed with the last phase of the 20 burner project announced on March 29, 2022 for a California refinery. The purchase order is for the manufacture and delivery of the remaining 16 burners, control equipment and spare parts. This purchase order follows the purchase order for a multi burner test and four burners required for that testing, and other ancillary items announced on September 1, 2022.

Work associated with the September 1(st) purchase order has progressed into the final testing and demonstration phase. The 20 burners are to be installed into two heaters at the customers refinery site in California in 2023 during their scheduled maintenance shutdown.