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Head to Head

Tank vs. Tankless

How a 100-gallon commercial gas water heater tank was outperformed by a tankless unit that uses less than 0.5 gallons.

Intellihot’s alternative to the popular 100 Gallon Commercial Gas Water Heater is a direct-fired gas water heater that has been built to deliver unbeatable high capacity, reliability and high-efficiency water heating.
System installation is faster, easier, and less expensive than traditional tank-type water heaters.
Dynamic Storage – New technology in our commercial water heaters
The secret to outperforming a 100 gallon commercial gas water heater is in our dynamic storage technology.
In a head-to-head comparison of a restaurant application, the Neuron iN199 outperformed a 199,000 BTU/hr. tank heater with 100 gallons of stored water. While the tank heater maintained ±6F of setpoint temperature only 2% of the time, the iN199 maintained ±6F set point temperature 99% of the time, even with rapid load changes.
This is possible because of our patented Dynamic Storage™ Technology. Our system uses an ultra powerful internal circulator effectively moving 300 Gallons of water every hour. This together with our high-speed controller that checks temperatures 20 times every second results in Dynamic Storage capacity that can meet dump load demands. See the graph below for real world results..
100 Gallon Commercial Gas Water Heater vs Intellihot iN199
These commercial gas water heater alternatives are perfect for those who want a compact and easy to install, yet efficient alternative to a standard storage tank.

iQ251 - Commercial Water Heater

Ideal for highly variable applications using potable hot water, these innovative on-demand, water heaters provide 96% thermal efficiency and are constructed for maximum durability

iN199 - Commercial Water Heater

Specifically designed to be drop-in ready for all tankless water heaters using Natural Gas or Propane that utilize a 100 gallon commercial gas water heater tank.


Commercial tank water heaters can weigh well above 750 lbs dry.
Intellihot offers the first, second and third largest capacity tankless gas water heaters. The iQ1501, iQ2001, iQ3001.

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