Thanks for answering

The tub is similar to a hydromassage tub,
exept it does not pump any water.

In Article 680 definitions this one sort of falls between the cracks.

It only blows air. All electrical components are double insulated. There is nothing to bond. I called the manufacturer today, they said no bonding is required. I also called the Mass board of electrical examiners today for a little guidance, but have not heard back yet.

Any thoughts ?

Mike