1. I am not aware of any 120/LP on demand water heaters for RV's.
2. On Demand usually requires 2- 120 Heating elements to supply enough heat for On demand. Only the Largest Aqua Hot type systems have dual elements. The smaller Aqua Hot types both LP/120 and Diesel/120, cannot supply on demand Hot Water(120 volt) for regular use.
3. After all the problems and complaints I have had from my customers in the past years, I would NEVER have a RV On demand Water heater. WE have replaced and also have replaced under OEM goodwill about 25 units over the past years from On Demand to regular RV Water Heaters due to customers hating the On demand. From bad operations to lack of continuous HOT water they wanted. Doug
