There are so many heater choices. How do I know which one is right for me? Gas heaters, electric heat pumps, and solar heating systems each have their own set of pros and cons. Gas heaters typically raise the water temperature between 1 and 2 degrees per hour. They raise the water temperature the fastest but typically are the most expensive in fuel consumption. They work well at the beginning and end of the swimming season and are good for a fast temperature boost if the pool is at your weekend home. To maintain warm pool water continuously an electric heat pump might be a more cost effective option. Heat pumps do struggle to maintain a warm temperature against cool night air at the beginning and end of the season yet during the season they are a more economical choice for continuous warm water daily. Solar systems typically have a higher upfront cost for installation than gas or electric heaters however solar heating has a zero cost for fuel consumption since the system captures the heat from the sun to warm your pool water. Solar heat systems must meet certain criteria for panel installation and amount/direction of sun at the location to work well. These systems also struggle to maintain warm water at the beginning and end of the season. Hybrid heating systems (combination of gas heater and electric or solar) tend to cover all of the heating needs but have a high upfront cost. The type of heater that is right for you depends on your lifestyle and budget.