State Condensing Water Heaters 
Review and Buying Tips

State condensing water heaters are the most advanced tankless models from the State Industries. Check out the review of its top features, benefits, and advantages and compare it to the conventional tankless models.

Features and advantages

State condensing tankless

There are two models from the State condensing series, both designed for residential water heating in larger homes, for multiple fixtures working simultaneously and space heating.

As non-condensing tankless heaters, condensing models are using the tankless technology, heating water on demand and providing endless hot water at the pre-set temperatures. Now, the difference is that condensing has one additional heat exchanger where the heat from the flue gases is utilized for preheating the incoming cold water.

This way water flows with the increased temperature through the second exchanger where it increases the temperature to the pre-set one. The condensing heat exchanger is made of the stainless steel as the additional protection against the corrosion, while the primary is made of the commercial-grade copper. The thermal efficiency is now increased to over 90%, which gives them Energy Star compliance. The flue gases are leaving the heater with the lower temperature which allows the State manufacturer to recommend PVC vents, instead vents made of stainless steel.

Note: Condensate neutralizer cartridge might be needed if the local code requires.

Model types

State condensing water heaters; GTS – 520-NIH, GTS – 320-NIH, GTS – 520-NEH and GTS – 320-NEH are indoor and outdoor models that can work with the natural gas and propane. If there is more hot water needed and one unit cannot meet the demand, the Easy-Link system can. Easy-Link allows up to four units to be linked into one system, so the power and water flow are much higher.

Indoor models utilize the power direct venting, and since they come with the sealed combustion, they can be installed anywhere inside the home, while outdoor models only outside and as long as the temperature climate is mild. The best solution for the outdoor models is the recess box, a box that protects the delicate electronics and other elements from the harsh weather.

State condensing water heaters from 320 and 520 series are built with the maximum water flow of 8 and 9 gallons per minute, when the heater heats the water with the maximum power of 180,000 or 199,000 BTU, with the temperature rise of 30 F. A modulating gas valve allows heaters to work with the lower power which can go to its minimum of 13,000 BTU.

Another major difference between State condensing and non-condensing units are found at the front, where the built-in LCD display shows the operating temperature and the error codes for easy diagnostic. There are sixteen different temperature settings, which are factory-set and that should be enough for the full comfort of using hot water. The temperature of the outgoing hot water and error codes can also be seen on the remote control, which is provided with the water heaters.

The warranty for all State models, including condensing is 12 years on the heat exchangers and 5 years on other elements.

Related: Rinnai RUR98

Safety features

  • Freeze protection
  • AFR sensor
  • Exhaust and water temperature
  • Overheat protection
  • Electronic board

If you are the owner of a large home with several bathrooms, and there is often high demand for hot water, State condensing water heaters might be the solution you are looking for. They will not only provide enough hot water, on demand and in endless supply, but they will be providing excellent energy cost savings too.


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