The Bay Collection

The ultimate in luxury, style and performance.

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Reflections Collection

Advanced engineering and a legacy of design

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At Home Collection

Affordable luxury, enjoyment and performance.

Explore At Home Collection

AquaFIT Systems

The ultimate in hydrotherapy and underwater fitness.

Explore AquaFIT Systems


The ultimate hybrid of fitness and fun.

Explore AquaFIT PLUS


The place to work out OR relax and have fun.

Explore AquaFIT PRO


The perfect mini pool for you and your family.

Explore AquaFIT PLAY


Have fun while you work out.

Explore AquaFIT SPORT

In the Water

Get In the Water

In the Backyard

Visit the Backyard

Intuitive Operation

See Intuitive Operation


Explore Environment


Explore Dimension One

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Distinctly D1®

At Dimension One Spas, our precision engineering is evident in every detail of every hot tub we sculpt, derived from a thirst for knowledge and a love of the latest technology. With nearly 50 years of pushing the envelope of what a hot tub should be, we have integrated intelligence, utilized the most durable materials and given you more features that give you exactly what you need.

Company History

Dimension One Spas, founded in 1977, has grown to become one of the world’s leading manufacturers of hot tubs and swim spas.

Dimension One Spas (D1) is the leading manufacturer of award-winning hot tubs and swim spas and home to the world’s first curvilinear spa. D1 Spas is based in Carlsbad, CA and sold through a network of retailers in the United States and worldwide. With over 35 years of experience, the company’s four product lines and patented features offer a higher class of design, performance and value that meet a variety of consumer needs. In 2007, D1 was awarded the Silver Medal Shingo Prize, becoming the world’s first and only hot tub manufacturer to receive the distinguished award. D1’s hot tubs have also achieved the Spasearch Buyer Guide’s highest “Recommended” rating – see more about our awards here.

  • 1977

    Dimension One Company Founded

    Dimension One opens its first retail store in La Mesa, California.

  • 1981

    First Fully Insulated Hot Tub

    D1 Spas is first to manufacture a fully insulated spa for in-ground or above-ground usage.

  • 1983

    Self-Contained Portable Spa

    D1 begins manufacturing a self-contained portable spa that is fully insulated and uses electronic controls.

  • 1987


    Introduces the UltraLounge®, the benchmark standard for hydrotherapy.

  • 1988

    CrystalPure Water Management

    First company in the spa industry to provide a factory installed ozone purification system.

  • 1989

    Volcano Jet

    Inroduces the first vertical jet with 100 GPM for foot, ankle, and calf therapy.

  • 1990

    Diverter Valve

    D1 introduces the patented user-serviceable diverter valve.

  • 1992

    EZ – Lifter®

    Receives a patent for the first fully adjustable cover lift in the industry.

  • 1994

    HydraFlex® Jet

    D1 brings out the patented HydraFlex® Jet, the only jet that adjusts for air-flow, direction and water volume.

  • 1996

    NeckFlex™ Jet Pillow

    D1 Spas is the first and only company to include an adjustable up and down patented head rest.

  • 1996

    UltraPURE Water Management

    D1 Introduces the most effective ozone water filtration system in the hot tub industry, UltraPURE®.

  • 1997

    FastFlo™ Heater

    D1 introduces a smart heater that enhances performance.

  • 1997

    Scrolling Message center™

    D1 introduces a self-checking diagnostic control center.

  • 1999

    Dynamic Massage Sequencer

    Introduces the revolutionary Dynamic Massage Sequencer which is the world’s only programmable hydrotherapy lounge.

  • 2002

    iWatch, Tactile Therapy, Magnets

    Release of several new systems to enhance user relaxation, iWatch, Magnetic Switches, and Tactile Therapy.

  • 2002

    Curvilinear Spa Design

    Breakthrough curvilinear design is patented and only available from D1 Spas.

  • 2005

    Liquid FX Package

    D1 brings out the LFX option package, the most sumptuous mood enhancing experience in the industry. Utilizing interchangeable water fountains, lights and more.

  • 2006


    Releases M-Drive, the world’s most intuitive and ergonomically friendly hot tub controller.

  • 2007

    UltraPURE PLUS

    An industry first, the only spa water management system to integrate ultraviolet germicidal light technology with an ozone system.

  • 2012

    Terracina Skirting

    Terracina skirting provides the most unique blend of durability and natural beauty found on the market, exclusive to D1.

  • 2014

    ClearZone PRO®

    Dimension One Spas releases Clear Zone PRO. This factory installed option is available exclusively on the @Home Collection.

  • 2015

    D1 Hub™

    D1 Hub™ brings convenience to your fingertips with a comprehensive control panel that manages your hot tub’s major functions in seconds.

Company Core Values

D1’s core values drive all D1 actions, decisions and plans so that dealers and customers alike can have the best experience possible.


We behave in ways that are morally, ethically, professionally and legally responsible. We take pride in our company and in ourselves, resulting in a positive image and reputation for the Dimension One family.

Continuous Improvement

We strive to be the industry leader in innovation and quality, constantly improving our products and services to further delight our customers. The diversity, involvement and accountability of our partners are the cornerstones of our success.

Environmental Stewardship

Help protect and sustain the environment by developing eco-friendly products and manufacturing processes.


There is no “I” or “they,” there is only “we”—the Global Dimension One Family, where everyone is treated with mutual respect and understanding. We continuously improve our skills, knowledge and operations and benefit mutually from our success.

Become a Dealer

Find out how to partner with Dimension One Spas® and become part of this fast-growing spa dealership.



Dimension One Spas® (D1®), founded in 1977, is one of the world’s leading manufacturers of premium home hot tubs/spas and AquaFIT Systems, commonly known as swim spas.

D1 has innovated countless new features and products that have resulted in over 30 patents. These are the innovations and advancements in science and engineering that have kept D1 an industry leader for over 35 years.

  • First Hot Tub Maker in World to Win Shingo Prize
  • Winner of Coveted Spasearch 2016 Certified Award
  • Stevie Award for “Best Customer Service Team”
  • Winner: The Society of Plastic Engineers’ Highest Honor: The People’s Choice Award
  • San Diego World Trade Center Exporter of the Year
  • Inspire Award, The Association of Pool and Spa Professionals
  • Ernst and Young Entrepreneur of the Year Award Winner
  • ISO 9001: Manufacturer Registered and Certified

Financing Options Available with Approved Credit

Copyright© 2016 New Dimension One Spas, Inc.