Considerations

• You may qualify for a tax credit if you purchase a new Energy Star rated tankless water heater.
  
  Tankless water heaters do have their limits. While there is no limit to how much hot water a tankless water heater can heat, there is a limit to how fast the hot water can flow. Any size tub can be filled with hot water using a tankless water heater; it is just a question of how fast you can fill it.
  
  It is imperative to choose the right tankless water heater for your needs. If your household runs more than one shower at a time, you will need a larger model.
  
  

Bosch Advantages

• Bosch offers electric tankless water heaters. This is important for those homes that are not hooked up to natural gas or propane. Bosch tankless water heaters also typically cost less than some other brands.
  
  

Noritz Advantages

• Noritz uses dual flame technology, meaning there are two rows of gas-ignited flames rather than just one. This makes it more efficient than other tankless water heaters. Noritz products are only available through its own professional distribution network. This ensures professional installation by people trained in installing Noritz products.
  
  

Bosch Disadvantages

• Bosch tankless water heaters have a higher minimum flow rate than Noritz. This means that if you use a trickle of water to shave or rinse your dishes, the water heater won't turn on and the water won't be hot. Some models of Bosch tankless water heaters may not efficiently heat water that starts at a low temperature, like northern areas with colder climates.
  
  

Noritz Disadvantages

• Be aware that severely hard water, over 12 grains per gallon, will void your warranty. You must test your water or get a report from your city water company and use a water softener if necessary. Noritz tankless water heaters are generally more expensive than other brands. Installation can be costly as well because you are likely to need to update your gas lines.