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.
Pool/Spa Size
K-Star Heater Size
RayPak Heater Size
500 Gallon Spa
5KW
5.5KW
15 ft Round
5KW
11KW
18 ft Round
10KW
18KW
21 ft Round
10KW
18KW
24 ft Round
15KW
18KW
27 ft Round
N/A
N/A
12' x 24' Oval
10KW
18KW
14' x 28' Oval
10KW
18KW
16' x 32' Oval
15KW
18KW
Note: All figures above are approximate and based on a constant depth of 48" (excluding spa measurements). Use only as a guideline.