Tankless hot water heater for an old Sunline?

[Aariel]

Hi, all. I have a 1997 Sunline Solaris and I'm planning to replace the hot water heater with a propane tankless hot water heater. Since the RV kind like Suburban does not seem like it will fit into the space, I'm thinking of getting an outdoor unit.


Does anybody have experience replacing their tank with a tankless hot water heater? If so, what brands seem to be the best? Thanks!