... heat pumpWork Condition:1)Refrigerant side (Between the tube and shell):R22,R134a,R404a,R407c,R410a,R600a,etc ... 50 Bar.2)Water side (inside of the tube):Domestic water,tap water,antifreeze (glycol solution) Max ... Effciency of Heat Exchange:1)Use efficiency finned copper tube, heat exchange area is 3.7 times than ... between the gas and water. Safety:1)Whole tube inside shell has no internal joint,that means ...