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Ed,When it is factory installed you know what you are getting....Some dealers may choose to used a different ozonator to save a few dollars...
Ed,I am unsure if it voids the ETL listing...but.....Hot Springs response points out the very thing I mentioned and that is you do not know what you are getting with your dealer....now I am sure if you paid for F.W. 3 system than that is what you would get...I think the grey area is when a dealer simply adds to an invoice add ozonator....that is where you are unsure of you are getting....
I would imagine the same is true of Sundance tubs. I'm sure D1 is a good tub, but there is no reason to say things that are not true just to hawk a spa.-Ed
Now..Now...whats wrong a little bending and tweaking among friends.... .... .....
I guess you're right. Since a little bending and tweaking is allowed, did you know that D-1's follow the same naming convention as a famous steak sauce? Maybe, with enough engineering they'll climb up to A-1. -Ed