How do Electric Pool and Spa Heaters work?
An electric pool heater creates heat in your pool or spa by applying an electrical current to a element with resistance, this generates heat. The electric heater pass water over the element, heats it, and exits the assembly housing warm and back into the pool or hot tub until the desired temperature is reached. Electric pool heaters are most appropriate for heating spas and small above ground pools.
How much will it cost?
It is quite easy to determine the cost per day, The formula is Power X Hours per day X Price Per KW. For this scenario we are going to use a K5 (which is a 5 KW unit), for 24 hours at an estimated $0.06 per KW. 5 KW X 24 Hours X .06 = $7.20 to run this unit, per day. This is actually an unrealistic price as once the pool is heated the unit will turn the heating elements on and off to maintain the temperature of the water rather then running at full power all the time.
Refer to the sizing chart on this page to determine the Electric Heater you require.