My Spa/Hot Tub/bucket of water sits outside and holds about 80 gallons of water. It's a 6x4 so relatively small.
It uses one of those approx. 2 x 10 inch inline heaters attached to a Balboa spa pack.
I see that most of the replacement heaters are either 4.0 kw or 5.5 kw
I'm running the spa on 220v.
What size heater should I purchase.
thanks in advance for any help or advise provided.