... ProceduresF1-> F3 F4-> F2Application scopeWall-mounted Heater, Heating Water Heater, Low Temperature Testing Equipment, Small-sized Refrigeration Equipment ... levels to ensure a long lasting life. Hard water will corrode faster than regular water. (Use distilled if possible; Distilled ... conversions, beer chilling, air conditioning system and solar water heating systems. It will work for any application ...