Feature:1. Cyclic Heating: It is heated by water and conducted by hot water, it turns cold water into hot water by heat energy and heats cold water, suitable for the simultaneous use of solar panels (shipped without solar panels).2. Built in Flow Limiter: This swimming pool heat exchanger has a specially designed built in flow limiter to ensure maximum heat exchange.3. Purpose: The thermostat heating equipment is designed to minimize the pressure loss in the heating system and save energy.4. Compact: It is small and compact, requires minimum installation space, light in weight, and equipped with a fixed bracket, which is convenient for installation and use.5. Corrosion Resistance: This heat exchanger is made of premium corrosion resistant stainless steel, which is sturdy and has a long service life.Specification:Item Type: Swimming Pool Heat ExchangerMaterial: Stainless SteelGross Weight: 3800g / 134.0ozProduct Size: Approx.48.5 x 15.7cm / 19.1 x 6.2inSpecification: 60KWSide Thread: female thread Approx.45mm / 1.8inFront Rear Thread: female thread Approx.32mm / 1.3inMaximum Operating Temperature: 230 (110)Usage: applicable to all types of swimming pools, spas and hot poolsApplicable Scene: swimming pool, hot spring, hot bathHeat Exchanger Model: MF 20018000 Gallon Pool Area: Temperature Required to Rise 1F/h Required Boiler: 150147 btu/ hour; Temperature Required to Rise 1F/h Required Boiler: 166830 btu/ hour20000 Gallon Pool Area: Temperature Required to Rise 1F/h Required Boiler: 166830 btu/ hour; Temperature Required to Rise 1F/h Required Boiler: 166830 btu/ hour22000 Gallon Pool Area: Temperature Required to Rise 1F/h Required Boiler: 183513 btu/ hour; Temperature Required to Rise 1F/h Required Boiler: 166830 btu/ hour.Package List:4 x Accessories 1 x Heater1 x InstructionNote:Excluding electricity