High Efficiency Gas Boilers
The Spectrum Series boilers by RBI offer the highest thermal efficiency available in atmospheric combustion today and is the only product in its size range, which uses 7/8" inside diameter, finned copper tubes in the heat exchanger. Larger diameter tubes handle higher flow rates and provide longer service life than competitive models that use 5/8" tubes. Available as residential heating boilers or light commercial water heaters from 100,000 to 399,000 BTU's. Spectrum Series boilers and water heaters are available with corrosion-resistant, brushed stainless stel jackets. Ideal for outdoor or indoor installation in corrosive or harsh environments.



HW Series by HYDROTHERM is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy installation, the internal draft diverter creates a low profile allowing installation in sites with low chimney connections or low overhead clearance.

Input: 50,000 to 200,000 Btu/Hr
AFUE: Up to 84.3%
Features Intermittent ignition


The Spectrum's diagnostic control panel for easy troubleshooting is a unique feature in this BTU size range. Solid bronze headers mean restaurants, hotels, and car washes need not worry about rusty water conditions common with lined cast iron headers over time.

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