I agree call Winnie about specific specs. Once you buy it, you can be more specific using the TT vin# for build specs etc.
Just something I would look into .
W...says it uses a tankless water heater but im not sure which model. I remember some negative posts regarding them and they may all be regarding Girard units (?).
I was able to find some info on the Truma units which seem interesting.
"Truma is a German manufacturer of comfort heating and water heating appliances. They’ve been a staple in European RVs for years, and the company itself dates back to the 1940s. They’ve recently started producing appliances for the North American RV market: both on-demand water heaters, and furnace/water heater combination units".
WinniebagoLife water heater
