5.5KW~18KW Swimming Pool Heater SPA Electric Water Heater Constant Temperature 5.5KW/7.5KW/9KW/11KW/15KW/18KW. Type: Swimming Pool Thermostat Heater. 1x Electric Swimming Pool Heater. It reduces the circulation of water during non-heating, prolongs the service life of the circulating pump, and is also more energy efficient.
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