Hello, I know this is off topic, but I just thought of something I have read about here, expansion tanks and wood boilers. I pulled out a Navian propane on demand tankless water heater yesterday and installed a 50 gallon Richardson electric water heater in its place. Just finished wiring it and turning it on. From reading on this forum I wondered if the small expansion tank on the left in the picture is going to be adequate for this 50 gallon water heater? I know absolutely nothing about this topic other than what I have read here so any help would be appreciated.