None SSU 30 Indirect Water Heater, Stainless steel, with Natural Gas. Storage tank, with 100,000 BTU.

This Super-Stor 30-Gallon Natural Gas Boiler uses a high-output heat exchanger and clean, natural gas to efficiently and effectively warm your home. It has corrosion- and rust-resistant properties for durability and an attractive, silver finish. Its base width is less than 21 in. for a small footprint and easy installation in tight spaces.