Bay Pelican
Moderator Emeritus
Isotherm sells both a SPA (Plastic shell) and a Basic (Stainless) 6.5 gallon water heater. Both have a stainless tank. I don't think the material of the outside shell is important in my installation. Question is does anyone know of any differences between the units that affect performance?
The price difference is $300.
The price difference is $300.