We have some great options in tankless water heaters, please see the helpful link below to all options listed. You did not list what water heater you currently have installed so I cannot select a possible direct replacement for you. My recommendation is to consider the Excel RV Tankless Water Heater, # EX93FR. This tankless gas water heater provides endless hot water on demand as long you keep the propane supplied. It has electronic ignition that requires no standing pilot and the power... view full answer...