Covering a pool when it is not in use is the single most effective means of reducing the pool’s heating costs, by as much as 50%–70%. Pool covers also can minimize the pool’s chemical use by 35%–60%, conserve water needed by 30%–50%, and reduce cleaning time by keeping dirt and other debris out of the pool.

When choosing a cover, look for:

• durability
• ease of taking on/off
• price and warranty
• insulation value and material transparency
• storage need
• safety

Resources:
Swimming Pools fact sheet from the Florida Energy Systems Consortium

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