Mestek announced that through a newly formed corporation majority owned by Mestek, it has purchased the operating assets of Airtherm Product Inc. and Airtherm Manufacturing Co. Mestek had sales of more than $370 million in 1999 and offers a broad line of hvac products under the names Sterling, Beacon/Morris, Smith Cast Iron Boilers, L.J. Wing, and others. Airtherm produces a wide array of commercial hydronic products.