Skip it in snow country?
Hey Dan while I think it probably works to a point, would you really see 10 to 15 dollar savings on the monthly bill? Probably not, so why bother? The other thing is it wasn't around 3 years ago and the spa's did fine.
To the original poster if your still around? I have never heard of it being installed after the factory not sure its an option or if I could actually order it in as say a part? That being said if the dealer never mentioned it, he might feel the same way I do about it.