Century offers high efficiency heating and cooling units for commercial applications. Our versatile product line lets you match a unit to your specific job requirements. Our packaged systems are available from 3 to 20 tons and can be slab-mounted or installed on a rooftop. The LG Industrial Oil Furnace, 225,000 to 450,000 BTUH, can be easily converted in the field for gas operation. Century also offers geothermal/water source heat pumps for commercial use, from 1/2 to 25 tons. .