H2X Challenger Series

The Challenger bridges the gap between fitness and performance, so you can take your training to the next level. Challenger models feature an innovative jet system that does not introduce air into the water stream. With VIP Technology and six strategically placed jets, the system creates a smooth, wide current of water that can challenge a novice or elite swimmer with the press of a button. Plus, experience the hydrotherapy and relaxation you want and need.

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    Challenger 21 D

    Offering the benefits of a pool with the therapy for a hot tub, this 21-foot swim spa is the perfect spot for swimming in place, water exercise, recreation, and relaxation.

    • Dimensions: 257" x 94" x 60"
    • Water Capacity: 1,830 Gallons
    • Propulsion System: Airless VIP Technology
    • Stainless Steel Jets: 53 (Incl. 6 Airless VIP Jets and 1 Master Blaster®)
    More Details
  •

    Challenger 18 D

    With an airless jet system, this swim spa is ideal for endurance athletes, fitness enthusiasts, and wellness seekers.

    • Dimensions: 215" x 94" x 60"
    • Water Capacity: 2,080 Gallons
    • Propulsion System: Airless VIP Technology
    • Stainless Steel Jets: 45 (Including 6 Airless VIP Jets)
    More Details
  •

    Challenger 15 D

    Seamlessly combining the benefits of a pool with a hot tub, this 15-foot swim spa features strategically placed massage jets that can be adjusted for your needs.

    • Dimensions: 180" x 94" x 60"
    • Water Capacity: 1,595 Gallons
    • Propulsion System: Airless VIP Technology
    • Stainless Steel Jets: 45 (Including 6 VIP Jets)
    More Details

  • Challenger 21 D

    Redefine backyard living with the H2X Challenger 21D. This dual-zone swim spa design provides an expansive swim area, a separate hot tub section, and an integrated sun lounge. Offering the benefits of a pool with the therapy for a hot tub, this 21-foot swim spa is the perfect spot for swimming in place, water exercise, recreation, and relaxation. Personalize your sessions with independent temperature controls, adjustable jets, and LED lighting.

  • Dimensions

    257" x 94" x 60"

  • Water Capacity

    1,830 Gallons

  • Propulsion System

    Airless VIP Technology

  • Stainless Steel Jets

    53

    (Incl. 6 Airless VIP Jets and 1 Master Blaster®)

Shell Options

  • Standard Shell Colors

    • White

Skirt Options

  • DuraMaster (standard)

    • Dark Walnut
    • Graphite

Model Specifications

Dimensions 257" x 94" x 60" (653 cm x 239 cm x 153 cm)
Water Capacity 1,830 (6,928 L)
Weight (Dry/Full) 3,735 lbs (1,694 kg) / 20,850 lbs (9,457 kg)
Propulsion System Airless VIP Technology
Power Requirement 240 V / 100 Amp 2x 230V / 32 Amp
Pumps 3
Stainless Steel Jets 53 (Incl. 6 Airless VIP Jets and 1 Master Blaster®)
Water Features 8
Ozone System Standard
Advanced UV Water Purification System Standard
Filtration EcoPur® Charge
LED Lighting Waterline
Listing Number 9972

  • Challenger 18 D

    The Challenger 18 D features an uninhibited swim area and increased depth for buoyancy. With an airless jet system, this swim spa is ideal for endurance athletes, fitness enthusiasts, and wellness seekers. The variable speed current lets you set the pace, whether you want a challenging workout or recovery session. After a workout, you'll enjoy the relaxation and rejuvenation of the Xtreme Therapy Cove and contoured seats with massaging jets.

  • Dimensions

    215" x 94" x 60"

  • Water Capacity

    2,080 Gallons

  • Propulsion System

    Airless VIP Technology

  • Stainless Steel Jets

    45

    (Including 6 Airless VIP Jets)

Shell Options

  • Standard Shell Colors

    • Sterling Silver

Skirt Options

  • DuraMaster (standard)

    • Dark Walnut
    • Graphite

Model Specifications

Dimensions 215" x 94" x 60" (547 cm x 239 cm x 153 cm)
Water Capacity 2,080 (7,874 L)
Weight (Dry/Full) 2,840 lbs (1,288 kg) / 21,115 lbs (9,578 kg)
Propulsion System Airless VIP Technology
Power Requirement 50 Amp System 230V / 32 Amp
Pumps 3
Stainless Steel Jets 45 (Incl. 6 Airless VIP Jets)
Water Features 1
Ozone System Standard
Advanced UV Water Purification System Standard
Filtration EcoPur® Charge
LED Lighting Waterline
Listing Number 9916

  • Challenger 15 D

    Train, recover, and relax in the comfort of your backyard with the H2X Challenger 15D. With an obstacle-free swim area, you can swim, exercise, and enjoy quality time with your family. Updated for 2025, the airless swim current delivers a superior swim experience that you can adjust based on your goals and fitness level. Seamlessly combining the benefits of a pool with a hot tub, this 15-foot swim spa features strategically placed massage jets that can be adjusted for your needs.

  • Dimensions

    180" x 94" x 60"

  • Water Capacity

    1,595 Gallons

  • Propulsion System

    Airless VIP Technology

  • Stainless Steel Jets

    45

    (Including 6 VIP Jets)

Shell Options

  • Standard Shell Colors

    • Sterling Silver
    • White

Skirt Options

  • DuraMaster (standard)

    • Dark Walnut
    • Graphite

Model Specifications

Dimensions 180" x 94" x 60" (458 cm x 239 cm x 153 cm)
Water Capacity 1,595 (6,038 L)
Weight (Dry/Full) 2,520 lbs (1,143 kg) / 17,120 lbs (7,766 kg)
Propulsion System Airless VIP Technology
Power Requirement 50 Amp System 230V / 32 Amp
Pumps 3
Stainless Steel Jets 45 (Incl. 6 Airless VIP Jets)
Water Features 5
Ozone System Standard
Advanced UV Water Purification System Standard
Filtration EcoPur® Charge
LED Lighting Waterline
Listing Number 9915

Pure Enjoyment

  • VIP Technology

    The unique design of the plate helps to control turbulence and the flow of water.

  • AquaSpeed VSP™

    With 25 speed settings, you can turn up the tempo for an interval workout or dial it in for endurance efforts.

  • EcoPur® Charge

    The clean, clear water you want without the harsh chemicals you don't. EcoPur Charge uses minerals like copper and zinc to purify water and remove dirt, bacteria, and algae.

  • H2Xercise™ Fitness System

    Water exercise is a great way to work toward your fitness goals. Most H2X swim spas come with the H2Xercise Fitness System, which includes rowing bars and resistance tubing.

  • Nonslip, Comfort Floor System

    The Nonslip, Comfort Floor System offers safety and comfort with the unique combination of traction and cushion.

  • Water Features

    The waterfalls of your swim spa are soothing to watch and listen to, adding to the overall ambiance of your backyard.

Therapy

  • Hydrotherapy

    Contoured therapy seats and adjustable massage jets help you find relief from muscle aches and achieve peace of mind.

  • Xtreme Therapy Cove

    The Xtreme Therapy Covers features a unique jet pattern that targets back, hips, thighs, and calves. Use as a recovery tool or enjoy a therapeutic massage.

  • Master Blaster Foot Therapy

    Treat your feet to a rejuvenating foot massage with the Master Blaster Foot Therapy. Each jet cluster features 14 individual nozzles for a soothing foot massage.

  • StressRelief Neck & Shoulder Seat

    Relieve tension and pain in your neck and shoulders with the StressRelief Neck and Shoulder Seat. The unique out-of-water jets target this high-tension area.

  • Bio-Magnetic Therapy System

    The Master Force Bio-Magnetic Therapy System features strategically placed magnets to relieve inflammation, improve circulation, and boost nervous system responses.

Sights & Sounds

  • LED Lighting

    Waterline LED lighting adds to the ambiance and overall enjoyment of your swim spa.

  • Wifi Module*

    Control your swim spa from the convenience of your phone. Set the water temperature, turn on the light, run the massage pumps, and more.

At Master Spas, we make buying a hot tub or swim spa just as relaxing as using one.

  • Visit Our Showroom

    Explore our full range of premium spas with confidence as our team answers any questions you may have.

  • Choose Your Perfect Spa

    Our Master Spas® of West Michigan team is here to help as you choose the model that is right for your lifestyle and space.

  • Live Better

    Enjoy better daily living from the comfort of your own home with Master Spas®
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