The following information and recommendations are based on over 25 years experience in pool installation and maintenance in Western PA.
Electric vs Gas Pool Heaters?
Electric pool heaters (Heat Pumps) cost more than gas pool heaters, but they are generally more efficient and cheaper to operate. With proper maintenance, electric heat pumps typically last longer than gas pool heaters. Electric heat pumps are essentially an air conditioner in reverse. They are also larger in size and heat slower than a gas heater. Electric heat pumps work efficiently as long as the outside temperature remains above the 45ºF–50ºF range. Since most people use pools in our area when it is warm, and because they last longer, we generally recommend heat pumps to most of our customers.
Pros: Low operating costs. Environmentally friendly.
Cons: Requires warmer ambient temperatures. Higher initial cost.
Natural gas or propane gas heaters are able to maintain a constant water temperature in any weather conditions and heat water faster. If you want to keep your pool warm when it is very cold (below 55ºF), then gas is your only option. If you only want to use your heater to get your pool to temperature quickly, then gas is a cheaper, faster heating option.
Pros: Heats pool quickly. Lower initial cost.
Cons: High operating costs. Requires regular maintenance.