Pay Attention to use capabilities
You will need to pay close attention to the use capabilities of the tankless water heater. It is great for a .5 gallon per minute faucets. Your typical bathroom faucet as a strainer that usually reduces the water flow to .5 gpm. In a commercial application some of the faucets can have upto a 2.5 gpm faucet. This will only allow this water heater to raise the water temperature around 3 -6 degrees, which is very little. So pay close attention to the gpm of the faucet you are using. This particular water heater may not be right for you. Other than the technical stuff this water heater has been good for the application I am using it for.