72cougarxr7 wrote:
Most of the complaints are about the cheap manually adjustable units. These have 2 knobs, 1 to adjust the gas/flame and the other to adjust the water flow. Any changes in water pressure or inlet temp will change the temperature of the water coming out of the unit.
What you want is one of the computer controlled, self modulating units. The computer senses inlet temp and flow rate and automatically adjusts the flame to give consistent outlet temperature.
You very much get what you pay for when you buy a tankless water heater!
Ours has only one knob which is for the water flow and the gas remains constant. We leave our water flow wide open. That way it comes out very hot at the faucet. Just like at home you adjust the temperature by adding the amount of cold water which gives you a desired temperature at the faucet. One cannot adjust an accurate water temperature at the heater due to the different distances that the hot water travels to each faucet. By leaving the valve wide open you will always get hotter then needed water at all faucets. It really works very well and used very little propane.