Some highly rated pool heaters include the propane-run, 400,000-BTU Sta-Rite SR400LP Max-E-Therm Pool And Spa Heater, the Smartpool Solar Pool Heater, the Pentair MasterTemp 400,000-BTU Heater and the Hayward Easy Temp 110,000-BTU Pool Heater. Each of these pool heaters have 4- to 5-star ratings on most review sites.
The Sta-Rite 400,000-BTU Pool Heater is lauded for its coverage as well as its energy efficiency. It is lightweight and made entirely out of rust-proof material, which tends to lengthen its life. Consumers have noted that this pool heater is extremely energy efficient and in turn lowers its operating costs. It has a fairly large heating system that distributes heat quickly and evenly throughout the pool. As of 2015, the price of this pool heater is on the higher end of the spectrum for pool heaters. Though it may be on the expensive side, consumer reviews have noted that it is well worth its price due to its efficiency and quality.
The Smartpool Solar Pool Heater uses solar power to heat up pools, which results in high energy efficiency and overall savings on energy bills. It uses propylene heat-collector technology that allows it to heat up a pool quickly and effectively. The solar panels should be placed in an area that receives a good amount of sun throughout the day so as to keep the pool constantly heated. As of 2015, the Smartpool Solar Pool Heater is priced on the lower end of the spectrum for pool heaters, making it affordable yet efficient.