Munchkin High Efficiency Gas Boiler
Very compact , 92% efficiency. Stainless steel construction.

Slant/Fin Sentry S Series Gas-Fired Boiler
Type: Hot Water
Venting: Natural Draft
Capacity: 34,000 - 210,000 BTU AGA Input

Slant/Fin Sentinel SE Series Gas-Fired Boiler
Type: Hot Water
Venting: Natural Draft
Capacity: 70,000 - 245,000 BTU AGA Input

A.O. Smith Conservationist® Burkay® HW
For larger homes and commercial buildings needing more 120,000 BTUs and up. Copper Coil Gas Water Heaters and Boilers.

A.O. Smith Burkay® Legend 2000® LW/LB
For commercial and industrial applications. High-efficiency gas boiler for hot water supply/hydronic heating applications. Advanced combustion technology and A.O. Smith's exclusive heat exchanger design assure 90 percent thermal efficiency. Multiple venting options.

A. O. Smith Burkay® Genesis® GB/GW 200-750
For commercial and industrial applications. Space-Saver Mid-Range Efficiency Gas Boiler. A compact unit with multiple venting options, multiple water input and output connections, and 83.7 percent thermal efficiency. The unique fan-assisted combustion system is designed to provide the proper gas/air ratio for maximum efficiency.