Choosing a heater for your pool and/or spa can raise a few questions. What is the most efficient? What offers the best options for my family? What size heater is best for pool and/or spa?
When looking into putting in a heater or replacing one, it is important to look at what uses you may have for your pool and/or spa. Daily use or sporadically or occasionally - when the grandkids are here. There are a variety of options to meet the needs of the pool and/or spa owner.
The US Dept. of Energy offers great insight into the variety of options. You can check their site here.