H2X Challenger · Fitness
Challenger 21D

Specifications
- Dimensions
- 257" x 94" x 60"
- Dry Weight
- 3,735 lbs
- Full Weight
- 34,045 lbs
- Jets
- 53 + 2 Master Blasters®
- Water Capacity
- 1,830 gallons
- Electrical
- 240V dedicated circuit, licensed electrician required (NEC-compliant)
See if we have the Challenger 21D on display
Standard Features
Aquaspeed VSP
Six airless VIP jets deliver a strong, steady swim current without introducing air into the water.
Hydrotherapy
Adjustable temperature controls and strategically placed jets, including a dedicated therapy cove.
LED Lighting
Waterline LED lighting for ambiance in the evening.
Cabinet Lighting
An illuminated logo and accent light bar built into the cabinet exterior.
Xtreme Therapy™ Cove
A dedicated jet pattern targeting the back, hips, thighs and calves.
EcoPur Filtration
Mineral-based filtration using copper and zinc to purify water and reduce chemical use.
Master Blaster Foot Therapy
14-nozzle jet clusters built for a focused, relaxing foot massage.
StressRelief Neck & Shoulder Seat™
Out-of-water jets positioned to target neck and shoulder tension specifically.
Master Force™ Bio-Magnetic Therapy
Strategically placed magnets along the seating to support circulation and recovery.
Water Features
Built-in waterfalls that add to the ambiance of the swim spa.
H2Xercise™ Fitness System
Rowing bars and resistance tubing built in for water-based workouts.
Wi-Fi Module
Control water temperature, lighting and massage pumps from your phone.
Nonslip, Comfort Floor System
A textured, cushioned floor built for grip and comfort underfoot.
Premium Options
Available upgrades. Ask us which are included or added cost.
Fusion Air Sound System
A Bluetooth® stereo with up to four water-resistant speakers and a subwoofer.
Mast3rPur™ Water Management System
Reduces the chemicals needed to keep water clean using a natural water-management process.
Challenger 21D FAQs
What are the dimensions of the Challenger 21D?
The Challenger 21D measures 257" x 94" x 60" and holds 1,830 gallons of water.
How many jets does the Challenger 21D have?
The Challenger 21D has 53 + 2 Master Blasters®.
How much does the Challenger 21D cost?
The Challenger 21D is quoted per build, because the price moves with the options you choose, the cover and lifter, the delivery and any electrical work. Tell us your setup and we will give you a real number the same day. Call the showroom nearest you or request pricing online.
Is financing available for the Challenger 21D?
Yes. Master Spas of California offers financing through Synchrony for qualified buyers, at 9.99% APR for 132 months with nothing down. On select models that works out to under $100/mo. for a hot tub and under $275/mo. for a swim spa; your payment depends on the model you choose, the options on it and your local tax rate. See our financing page for complete terms.
Where can I see the Challenger 21D in person?
You can see the Challenger 21D at our California showrooms: Brea (270 N. Brea Blvd), Escondido (499 N. Hale Ave), Pleasanton (4877 Hopyard Rd B-2). Call ahead and we will confirm it is on the floor before you drive over.
Compare Other H2X Challenger Models
Other swim spas in the H2X Challenger.
Visit Us
Sit in one before you decide
Stop by any of our 3 California showrooms and try one for yourself. Our team will help you find the right fit for your space and budget.



