Hey all. My wife and I just bought a year and a half old hot tub last week. I'm wondering about adding some extra insulation to the cabinet before we put it in it's final resting place and actually get her running. It's by no means a "high end" tub, but it's also not a cheapie IMO. It's a Four Winds "Honolulu" tub, about 450 gallons. I've taken the side panels off and it appears that it's just heavily spray foamed (appears to be "open cell" foam) for insulation and I think that the skirting/side panels are also made out of some type of dense (but lightweight) foam which is then formed and pained to look like wood paneling.
My question is, would it be worth it to add more foam (IE "Right Stuff") even though it seems pretty thick already? Would another type of insulation be better (IE stuff existing voids with batting)? Also, the foam is lacking a bit on the motor/plumbing side of the tub; obviously to keep those parts accessible. Can anything else be done in this area? I'd be interested in utilizing the heat from the motors, but I'm not sure this can be accomplished with the existing spray foam in place.
Any suggestions would be appreciated. I'll see if I can snap some pictures tomorrow and post 'em up.