The heater is one of the most crucial parts of the hot tub because it is what makes the water warm. From the pump, the water is sent to the heater to be heated before the water is released to the tub itself. In order to have a good hot tub experience, your hot tub must have the best hot tub heater there is. Top 3 Best Hot Tub Spa Heater Recommended for You Hayward CSPAXI11 11-Kilowatt Electric Spa Heater Pros: Cons: Raypak 11Kw Electric Spa Heater 001640 Pros: Cons: Hayward H150FDN Universal H-Series Natural Gas Residential Pool and Spa Heater Pros: Cons: How the Water Heater Works After the water has gone through the hot tub filter, the water goes … [Read more...]