Report on Marey On Demand Tankless Hot Water Heater
As promised, here is a report on my experience with the Marey tankless, on-demand hot water heater.
I decided to use the Marey 5L water heater in my '54 Safari after an expensive, budget breaking restoration pretty well depleted my funds (despite the fact that I did all the work myself!).
I paid about $150 for the unit. The water heater is small,about 20" x 14", thin, has an attractive white enameled sheet metal case and mounts easily, out of the way, to a wall. Allow sufficient air space between heater and wall. The hookups are easy, cold - in, hot - out, and LP gas. I used flexible braided water lines and copper line for the gas.
Three controls, lo - hi gas, lo - hi water flo, and summer - winter heat settings are set to theuser's tastes. I found that the winter, hi gas, medium water flow worked best.
Unit really does need some warm up time, 10-15 seconds, and produces a "water sandwich" at first (hot with cold in between). Things quickly stabliize out and The Marey gave us nice, even hot showers and dish washing water. At no point was I able to adjust the temperature to a point where it would be uncomfortably hot. This might not sit well with folks desiring extra hot water, perhaps for washing machines,
The on-demand feature functioned very well. It uses two "D" batteries which provide the ignition for lighting the gas. You'll hear a series of fast '"clicking" then the quiet huff of ignition. The blue flame grid is visible thru a narrow peep slot in the center of the case front.
Included with the heater was a shower hose with shower head attached. This worked very well. I chose to use a a splitter and two separate control valves, one for the shower alone, the other for the bathroom and kitchen sinks.
The unit must be vented . I constructed a three inch diameter pipe from riveted aluminum flashing which leads thru the roof to a small chimney cap.
We used this water heater all week and it performed well with absolutely no problems. The surrounding space did not get too hot, either. It's not a bad idea to leave the bathroom window open as it shouldn't be used in a confined space without proper ventilation.
All in all, an unbeatable water heater for the money