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SuperStor Ultra Max Water Heater Header

Taken to the Max

The SuperStor® Ultra Max is the Indirect water heater you know and love, with upgraded features and benefits that have been taken to the max. Built with a laser welded stainless steel tank and corrugated stainless steel heat exchanger, the Superstor Ultra Max is built to last by resisting corrosion. Average commercial water heater lifetime is about 6 years; the SSU Max will outlast any coated steel tank on the market!

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Max Performance, Max Efficiency




With help from its Stainless Steel Heat Exchanger, the SSU Max Indirect was built for MAX performance. Some of the benefits include higher heat transfer, improved first hour rating and less pressure drop than the competition. The SSU Max can also generate 50% more hot water than many water heaters of similar size. When used in conjunction with an HTP high efficiency boiler, operating costs decrease even further. HTP’s SSU Max comes with a surface mounted thermostat for highly accurate temperature control as well. Did we mention it’s also virtually maintenance free?


Versatility to Meet Your Needs

HTP’s SuperStor® Ultra Max is suitable for both residential and commercial applications. It features top connections: T&P Relief Valve and Stainless steel inlet and outlet ports. The SSU Max is available in 5 different gallon capacities.

180°F Boiler Water First Hour Rating 180°F Boiler Btuh/Size
Recommended Flow Rate
Pressure Drop at Recommended Flow Rate
228 Gal.
1.7 Ft
257 Gal.
10 GPM
2.3 Ft
303 Gal.
10 GPM
2.3 Ft
347 Gal.
12 GPM
3.0 Ft
387 Gal.
14 GPM
3.75 Ft

Max Savings




An indirect water heater is one the most cost effective ways to heat water because it eliminates the tremendous flue losses associated with gas-fired storage water heaters and the hassles and extra costs of tankless gas water heaters. When used with a modern, high-efficiency boiler, these energy savings hold true even in the summer when your boiler isn’t needed for heat.

Max Quality



The SSU Max is manufactured with long lasting, 316L stainless steel construction to resist corrosion. The high output corrugated heat exchanger is also made with 316L stainless steel to provide maximum efficiency and heat transfer with increased surface areas over traditional smooth tube coils.


Max Assurance

The SSU Max is backed by a Lifetime Limited residential warranty and 5 year Commercial Warranty when registered online.

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Download HTP’s FREE Mobile App. Perfect for when you need guidance on the job. You’ll be able to access installation manuals, parts and installation drawings, brochures, troubleshooting videos and more.

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