AquaHot is the greatest thing since sliced bread! Never run out of hot water, heat is whisper quiet as each vent has it's own small fan to circulate the heat. The engine heats the water as you're traveling too, so when you set up you have hot water. Works as an engine heater in cold weather. Everything it's cracked up to be. Recommended service to replace nozzle each year but we do ours every other year...about $100 at an RV show or Q. You'll know if it needs servicing by the exhaust when it's running. If it smokes, the nozzle needs to be replaced.....Dennis