I wanted to share the story of the conversion of my 2013 Jetsetter from 110v to 220v given that I gathered all info on the process through a mix of online posts. I chose to do the job myself and am pleased I did. I am not an electrician, but I study DYI pretty hard! Living in NH, I wanted both the jets and heater running at once. I previously had a large Jucuzzi hot tub that I removed (junk!) over six years ago. It was connected with a 60A GFCI breaker in an indoor subpanel which was connected outdoors via 8 gauge wire to a disconnect box. I changed the indoor configuration to a 50A regular breaker (I had to reconnected the neutral which was not used by the original 60A GFCI - something I did not see at first) and connected it to a very basic Siemens outdoor panel (Siemens Energy W0408ML1125U $26 Amazon) with a 30A GFCI double ($50) and 20A GFCI single ($30) which I installed. Of note - there is a $250+ panel sold by Watkins which I am very glad I did not buy - the Siemens set up with two GFCIs was 1/2 of that including the single pole 20A GFCI!). I used (five strands) 10 gauge wire to connect from the panel to the tub (~25' of each wire for a tub that is about 15' from the panel). I ran everything under my deck (much thanks to my buddy's 8 year old son to get under there and pull the unconnected conduit). I placed all wiring in grey locktight conduit. The instructions in the Hot Spring guide were accurate. All-in-all disconnecting the 110v and connecting the 220v was fairly straight forward. The process went smoothly and things seem to work well. I just took my first 220V tub, with jets running 100% of the time, for about 50 minutes. It was 45 degrees out in NH (balmy night!). The water went from 103 to 100 degrees. I am not yet attune to how the water temperature will change with 220V, but I am curious how it has gone for others. Running the jets in the cold churns everything quite a bit so I think this is probably going to be typical. I hope this helps someone else planning to do a similar job. I definitely suggest using 220V given what I know. Feel free to email me.
