Description Overview Watertube type Natural gas fired Model: 75DS 300 Quantity: 2 Specifications Design pressure: 300 psi mawp Capacity: 150,000 pph (both) 75,000 pph each Heating surface: 5,733 sq.ft Fuel type: natural gas Included Equipment Economizer Inlet air ducts Forced draft fan / motor Fuel train Standard boiler trim Additional Options For purchase of both, the da tank and feedwater pumps can be included Available separately or together