Used 1080 Sq Ft (22694 extended) Fin Fan Heat Exchanger. Manufactured by Chart Cooler Service. Model 1-HF132-1-16. (258) 1"Dia Carbon Steel Tubes rated 400 PSIG@250F. (1) Fan. CS Header. National Board #16911. Serial #42313-1. Built 2014. Past use Service Lube Cooler