Gemini - 2 Person Hot Tub - Designer Series


Seats: 2 Adults
Jets: 28-51

A stunningly elegant and intimate hot tub perfect for relaxation indoors or outdoors

Available Shell Colors

  • Blue_Stone
  • Desert_Stone
  • Copper_Beach
  • Ocean_Wave
  • Silver_Marble
  • Midnight_Opal
  • Frosted_Pearl
  • Calico_Marble

Available Cabinet Colors

  • American_Cherry
  • Burmese_Teak
  • Mahogany
  • Nantucket_Gray

Click the button below to interactively customize colors, jets, options & more!

Design Your Own!

Gemini Summary

The Gemini fits where other spas can’t. This two person hot tub can be customized with built-in pillows and many other amenities of a full-size spa. The Gemini is considered the perfect spa for personal relaxation yet offers room enough for two. Each side offers a slightly different seating design and jet configuration. Each seating area is contoured for deep soaking, with enough room to stretch out and enjoy a neck, shoulder, or foot massage. The Gemini may be installed indoors or outdoors and its elegant cabinet design truly provides the look and feel of fine furniture. The Gemini is an extremely economical yet intimate getaway for two or a luxurious retreat for one.

Gemini Details

The Gemini offers an impressive array of standard features:

  • gemini hot tub dual seating

    Dual seating areas with different jet configurations.

  • hot tub control panel

    Easily accessible digital control panel for easy operation.

  • gemini hot tub multiple shelves

    Multiple convenient shelf areas for drinks, books, towels, etc.

  • hot tub pillow jets

    Pillow Jets provide the ultimate neck and shoulder massage.
    Learn More

  • hot tub led lighting

    LED underwater lighting for added ambiance and safety. Learn More

  • hot tub heaters

    Heaters with titanium components last 10x longer than standard heaters. Learn More

More Standard Features:

  • Continuous Cast Acrylic Shell
  • ThermoBond™ Underlayment System
  • ThermoBoard™ Cabinetry
  • 2” x 6” Frame Construction
  • Decorative & Protective Top Rail
  • Removable & Reversible Wall Panels
  • Full ThermoInsulation™ System
  • Sound Deadening ThermoBlanket™
  • 3” Insulated Raised ABS Base
  • All Pumps Include Viton® Seals
  • 24/7 High Output ThermoFiltration™
  • Manifold Plumbing System
  • Easy Disconnect Hand Unions on All Components
  • 2-lb Density ThermoCover™

The Gemini offers a wide variety of optional features and packages for design, relaxation, and entertaining:

  • Total Control Therapy® allows each person to control the jets in their own individual seat. Learn More

  • deluxe hot tub lighting

    Deluxe LED lighting package for the ultimate hot tub environment. Learn More

More Available Options:

  • Air Bubbling System with Control Valve
  • Stainless Steel Jet Package
  • 30 mg Standard Ozone
  • 250 mg ThermOzone™ System
  • Safety Hand Rail
  • Standard 3’ and Full Length Step Packages
Seating Areas 2
Total # of Pumps




Total # of Jets 28-51
Heating Capacity (BTU’s) 13,600 / 18,750
Electrical 120 VAC / 240 VAC
Dimensions (LxWxH) 81.5”x46”x30.5”
Capacity 215 Gallons Full

Measurements are approximate and may vary slightly. Specifications subject to change without notice.

20-Year Structural Warranty
10-Year Shell Surface Warranty
10-Year Equipment Replacement Warranty
10-Year Electronics No-Fault Parts Replacement Warranty
3-Year Cabinet Warranty
Labor Warranty
Accessories Warranty

Learn more about the ThermoSpas® Premium Warranty

Download ThermoSpas® Premium Warranty PDF

Gemini is rated 4.4 out of 5 by 13.
Rated 5 out of 5 by from Love it Great for my back. Instantly relaxes me and soothes away the aches.
Date published: 2018-10-17
Rated 3 out of 5 by from Lots of jets & comfortable but... I have had this spa for 1 1/2 years. It is located on my covered screened in porch & has never been in the elements. We certainly were pleased every time we were in it! We had a problem with the thermostat sticking which caused the spa to overheat & shut off in March 2016. A tech showed up & fixed the problem. I drained the spa November 2017, cleaned it, refilled it & the water was perfect- crystal clear! About 2 days later I noticed the water level had dropped & there was a puddle of water behind the spa. We finally located the leak- it was leaking from the skimmer. The gasket had completely deteriorated & was in pieces! The gasket was some sort of paper/cork material geez. As much money as we invested & the glowing praise of the equipment from the salesman, we feel it shouldn't have leaked that quickly!
Date published: 2017-10-13
Rated 5 out of 5 by from Well worth it all!!! Recently had this unit installed in our basement (pretty rare!) Our salesperson Rick went so far above and beyond the "call" it was almost unbelievable. Inside installs are rare and often very difficult, but it finally worked with a crack crew under Rick's direction. Therma has changed everything! It's almost more of a lifestyle change (believe it) even more that the very accurate therapeutic benefits. Great call for us and for you!!!
Date published: 2016-11-02
Rated 5 out of 5 by from True therapy! Meets all expectations and more. Jet locations actually reach neck and shoulders without total submersion. Retains heat at constant temperature.
Date published: 2016-10-07
Rated 5 out of 5 by from Amazing Jets I bought my spa in March and have enjoyed every minute I spend in it. i love the jets and the feeling of being surrounded by the water.
Date published: 2015-10-14
Rated 5 out of 5 by from Our Sanctuary We recently remodeled our bathroom and replaced a two-person whirlpool tub with the Gemini. We initially bought this spa for the therapeutic relief it provides for arthritis and joint pain, and in that regard, we can't say enough about how much it has helped. We use it twice a day, once in the morning and once in the evening, and we feel like we have our own private sanctuary. We love, love, love this hot tub and feel it is one of the best investments we've ever made. Thank you!
Date published: 2015-04-16
Rated 5 out of 5 by from Pure Enjoyment The hot has really helped alleviate a lot of the muscle aches and pains I would develop either from work stress, workouts or even yard work. I would average at least one headache a week. But I found a couple of times in the hot tub a week I hardly ever get those nagging headaches.
Date published: 2015-04-13
Rated 1 out of 5 by from No great features Not happy at all not comfortable had it over a year used it about 5 times
Date published: 2015-04-01
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My husband works a swing shift and after night shift, enjoys relaxing in the spa listening to his favorite music and tends to sleep better after a good soak.

Wendy S.

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