How to Compare Pool Heaters

Choosing the right pool heater requires the consideration of many different specifications, but the most essential comparison involves fuel type. Common fuels include electricity, natural gas, propane gas and solar power.

  1. Consider Efficiency

    • Electric heaters, or heat pumps, generally have the highest efficiency at 300-700 percent, meaning that for every unit of electricity pumped into the heater, 3 to 7 units of heat pump out. Natural gas heaters have an efficiency of 89-95 percent, so for every $100 of fuel used, the heater produces $89 to $95 of heat. Solar heater efficiency varies daily according to weather conditions and accuracy of instruments, among other conditions.

    Consider Cost

    • System and installation costs vary by model, but consumers have some averages to consider. For example, the average gas heater for the usual 15-by-30-foot pool costs approximately $1,300 for the unit, with installation costs of $1,650. Equivalent solar heaters cost around $1,900 per unit with an installation cost of $2,800.

      Operation costs also vary by model, but on average, solar heaters cost the least to operate at $30 to $75 a year.

    Consider Climate

    • Electric and gas heaters maintain desired temperatures regardless of weather conditions, while solar heaters work best in warm, sunny regions. Electric heaters maintain pool temperatures between 80 and 90 degrees when the outside temperature remains above 45 degrees, while solar heaters only extend the swimming season by a few weeks in colder climates.