The best way to heat a swimming pool is by using an electric pool heater. Electric pool heaters are cheaper to operate than gas pool heaters, and they are also more efficient. Gas pool heaters can be hazardous if not properly installed, and they also produce carbon monoxide emissions. Electric pool heaters do not produce any harmful emissions, and they are safer to use than gas pool heaters.

There are a few different ways that you can go about heating your swimming pool. The most common way is to use a gas-fired heater, which will warm the water by burning natural gas or propane. You can also use an electric heater, which will use electricity to warm the water. Finally, you can use a solar heater, which will use energy from the sun to heat the water. Each of these methods has its own advantages and disadvantages, so you'll need to decide which one is best for your needs.