The IHeat Electric Tankless Water Heater Model S-16 has the capacity of heating 3.5 GPM which is the equivalent to 2 showers (at 1.5 GPM each), and 1 sinks (at 0.50 GPM each) simultaneously, or any combination which equals to 3.5 GPM. The S-16 can handle these applications in the warmer climates of the US which are Florida, Georgia, Louisiana, Texas, Arizona, California, Alabama, and Mississippi. Anything north of these States the Model S-16 can be used for point of use, or 1- application at a time. A good rule of thumb is if you live in the southern states mentioned here the S-16 can power a 3 to 4 bedroom 2-1/2 bathroom home, including dishwasher and clothes washer, please keep in mind that tankless water heaters are designed to heat incoming water at a maximum output temperature based on simultaneous use and inlet water temperatures. So if your demand for hot water decreases your output water temperatures will increase, as well as if you live in the colder states this S-16 will heat less volume of water, this will cause the S-16 to be used in Point of Use applications in the colder climates.

The IHeat Tankless water heater comes in different models, for the different climate requirements and the heated water need. The IHeat tankless water heaters are designed to heat an incoming water flow up to a maximum output temperature. The performance of each model will depend on the capacity of the model, the heated water demand and the inlet water temperatures. So if your demand for hot water decreases your output water temperatures will increase The success of the iHeat Water Heater experience will depend on the selection of the right model. The IHeat Electric Tankless Water Heater Model S-16 has the capacity of heating 3.5 GPM which is the equivalent to 2 showers (at 1.5 GPM each), and 1 sinks (at 0.50 GPM each) simultaneously, or any combination which equals to 3.5 GPM. The S-16 can handle these applications in the warmer climates of the US which are Florida, Georgia, Louisiana, Texas, Arizona, California, Alabama, and Mississippi. If the IHeat Model S-16 is installed on a cold climate where the inlet water temperature is 40 to 50 Degrees Fahrenheit the heating capacity will be only 1.7 GPM and the performance will be limited to only one application at a time, For example, one shower, or the kitchen at a time. For that cold climate conditions the recommended use for the IHeat S-16 Model is in Point of Use Application. For multi point use or for a full house use you will need a bigger model on those regions.