For the typical user, comfortable pool water temperatures are 78°F to 82°F in spring and fall and 76°F to 78°F in winter. Average yearly cost for heating a residential pool in Florida is $1,450 using electrical resistance (electricity at $0.09/kWh), $500 using an electric heat pump and $580 using natural gas. Liquid propane would cost the same as electrical resistance.
http://www.fsec.ucf.edu/en/consumer/solar_hot_water/pools/q_and_a/index.htm
According to the US Department of Energy, solar blankets, can reduce pool heating costs 50 to 70 percent, can reduce the amount of water that needs to be added to a pool by 30 to 50 percent and can reduce the pool's chemical use by 35 to 60 percent. Turn down the temperature.
http://www.poolheatpumps.com/pool-heaters.htm
A typical solar heating system costs from $2,000 to $4,000 installed. Compared with average fossil fuel heating, a solar pool heater offers a most favorable payback of 1.5 to 7 years. In addition, the solar pool heating industry in Florida is mature. It has numerous distributors and contractors and a track-record of over 20 years of experience.
http://www.fsec.ucf.edu/en/consumer/solar_hot_water/pools/q_and_a/index.htm
Pool Heater Cost Calculator. Build the perfect pool environment with Jandy Pro Series professional-grade swimming pool equipment. With a full line of pumps, filters, heaters, lights, valves, water sanitizers, and the automation solutions to control it all, Jandy has the complete equipment package for any swimming pool or spa.
http://www.jandy.com/en/calculators/pool-heater-cost
For pools, this method is one of the most expensive methods of heating, and can cost up to 5 or 6 times more to run than a heat pump. Electric pool heaters are ideal for spa heaters, but cost too much to run and heat a swimming pool.
http://www.poolheatpumps.com/pool-heaters.htm
1 Pool heat pumps cost more than gas heaters, but because of their high efficiencies, the yearly operating cost ends up being less than a gas heater.  Pool heat pumps tend to last longer that gas heaters, as well, as long as proper maintenance is observed.
http://www.wikihow.com/Drastically-Reduce-the-Cost-to-Heat-Your-Swimming-Pool
Obviously, the size of the gas pool heater you need will depend on the size of your pool. For an average 32 m2 pool the price is likely to be in the region of $3,000 – $4,000. Installation is pretty straightforward, and typically comes in at around $250. Here’s the catch.
http://www.myperfectpool.com.au/pool-heating-cost.html
Pool heat pumps are an efficient, environmentally friendly way to heat a pool. Heat pumps can save pool owners money in the long run as they typically have a much lower annual operating costs than gas heaters and with proper maintenance, can last up to 10 years or more. This method of heating is environmentally friendly as they use less energy than other heating methods.
http://www.poolheatpumps.com/pool-heaters.htm
Depending on the size of your pool, basic systems range from around $1,000 to around $5,000. Again, depending on the size of your pool, installation costs generally range from between $600 to around $2,500. In general, for a typical 8m x 4m pool, a solar heating system is likely to cost around $2,500 and the installation another $1,250 – $1,350; a total fully installed cost of around $3,800.
http://www.myperfectpool.com.au/pool-heating-cost.html
Use a pool cover. Evaporation is the largest source of energy loss for pools. This can easily be prevented by using a pool cover whenever the pool is not in use, which will minimize evaporation. It’s the most effective way to reduce pool heating costs – it can reduce cost by as much as 50 to 70 percent. There are several pool cover options available on the market, including manual, semi-automatic, and automatic pool covers.
http://www.wikihow.com/Drastically-Reduce-the-Cost-to-Heat-Your-Swimming-Pool
how much do pool heaters cost
The cost of a pool heater is from $3,000 to $4,000. A pool heater costs between $3,000 and $4,000.