- Electrically-driven pool heaters are typically heat pump systems. Warmth is pulled from the heat pump's surrounding air region. A compressor increases the heat's temperature and transfers the heat to the pool water. In contrast, gas pool heaters burn gas, either propane or natural gas, for a heat source. The generated heat transfers into the pool water for a comfortable swim.
- Electrically-driven heat pumps run very efficiently. As a result, electrical costs for running an electrical pool heater are minimal. Annual costs for running an electrical pool heater are approximately $250 to $500. However, the initial system and installation cost is relatively high, costing approximately $4200 for a fully installed system.
- In contrast, gas pool heaters do not run as efficiently as the electrically-driven heaters. In addition, the gas type also determines the annual cost. Running propane will cost a homeowner between $1,000 and $1,500 per year. Alternatively, natural gas will cost a fraction of the propane cost, approximately $500 to $750 per year. Gas heating is an attractive heat source since the initial system and installation investment is not as expensive as the electrical heater system. A fully installed system will cost approximately $1,650.
- Gas pool heaters naturally heat water very quickly. As a result, gas heaters are a practical heat source for small bodies of water, like spas, that require a rapid heating element. The electrically-driven pool heater warms the water at a slower rate, making this heat source more practical for large pools that need heating over extended periods, such as a summer vacation.
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