GSX Steam Gas-fired Boilers



The Smith GSX gas-fired residential boilers are designed to provide dependable, efficient heat. The GSX are available in 7 sizes ranging from 88 to 288 MBH with efficiencies of up to over 82% AFUE.

Sized for Efficiency

You'll appreciate the flexibility offered by the GSX boilers. Seven different sizes, each with ignition options make it a cinch to size every system for maximum efficiency.


Cast iron construction offers superior durability and longer life. Each GSX boiler is full-fired at the factory prior to shipment and is backed by a 10 year limited warranty (see warranty statement for complete details).