The unit works with ng and propane. There is no auto relight necessary, as it's electronic ignition lights when ever water flow starts (exactly like my tankless water heater in my house does). Speaking of tankless, my house tankless water heater has been going for a couple of years without any problems, ever. I will be using drain to waste for the cooling, which means I will need to add an electric water valve on the inlet to the unit. I will have to see if any of the local shops have them. They are a bit more $ than the Hydo Innovations, but it would be worth it if it works well. Microsoft Office 2003 Basic Oem Activation Key.

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I will have to check it out. Noone88,Thanks for all the info.

I will look into both the sentinel and the cap units. I have often wondered about just picking up a tankless water heater from Menards or Home Depot and working with that. I believe the HydroGen is nothing more than a reworked Marley tankless unit anyway.