Home All Products Share this page Explore our full Catalog Search through our full product offerings SVF Stainless Vertical Firetube (725–850 MBH) Fuel Type: Gas Heat Exchanger Material: Stainless Steel Heating Range: 725-850 MBH Mediums: Water Ultra Oil Boiler Fuel Type: Oil Heat Exchanger Material: Cast Iron Heating Range: .84-1.40 GPH 112-196 MBH Mediums: Water Ultra S4 Gas Boiler Fuel Type: Gas Heat Exchanger Material: Aluminum Heating Range: 80-399 MBH Mediums: Water WGO Series 4 Oil-Fired Water Boiler Fuel Type: Oil Heat Exchanger Material: Cast Iron Heating Range: .70-2.55 GPH 98-357 MBH Mediums: Water WTGO Series 4 Oil-Fired Water Boiler Fuel Type: Oil Heat Exchanger Material: Cast Iron Heating Range: .70-2.55 GPH 98-357 MBH Mediums: Water Previous Page 1 … 4 5 6