The Bryant 234 D is a low-pressure, sectional, cast-iron water and steam boiler designed for use with natural and propane gases. It features a gravity, circulation pump, coil circulation pump, or steam type, and comes factory-assembled. The boiler is great for heating homes and small buildings, providing up to 240,000 Btu/h of heating power. It also has various safety features, like a 100% in-line shut-off, thermocouple pilot, and 24-volt transformer, ensuring safe and efficient operation.