The Compact Series Heat Pump 62,000 BTU - 016635 MODEL # R3450TI-E range is 65°F – 104°F for spa use and range is 65°F – 95°F for pool use. The 62,000 heat pump will raise the temperature by 1-degree every 15-minutes for the spa with approximately 1038 gallons. You will need to use Natural Chemistry COVER FREE 32 Oz - 07100 to prevent evaporation 80% of heat loss is due to evaporation.
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