Great video. Lots of installers have no clue about the isolation valves.

Great video! When deciding what type of tankless water heater to install in our house, I decided that a 'condensing ' indoor water heater would be best for our environment (mountains 6000').. Condensing waters are the most efficient and most expensive, but worth every penny when you need an unlimited source of hot water.. It would be neat if you could make a follow on video regarding the parameters you used to choose the model that you installed, the type of maintenance and perhaps how you decide to set up the output temperature of the heater.. These water heaters save money because they only use gas when you demand hot water.. A great invention! Tanks again for your videos..