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.
Challenger 21 D
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2026
Challenger 21 D
- Collection: H2X Challenger Series
*At Hot Tub Family, we don’t sell off MSRP. We offer Everyday Low Prices. Click “Request Sale Pricing” for Special Sale Event Pricing, Expo Pricing, Factory Seconds, Manufacture Rebates, or Limited Time Financing Offers.
Specifications
Redefine backyard living with the H2X Challenger 21D.
DIMENSIONS
257" x 94" x 60"
653 cm x 239 cm x 153 cm
SEATING
Open Seating
JETS
53 Jets
FILTRATION
EcoPur® Charge
SPA VOLUME
1830 gal
(6928 L)
SPA WEIGHT FILLED
20850 lbs.
(20850 kg)
SPA WEIGHT DRY
3735 lbs.
(3735 kg)
ELECTRICAL
240 V / 100 Amp
All dimensions are approximate. Spa Volume is based on average fill. Specification are subject to change without notice.
Features of the Challenger 21 D Swim Spa
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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.
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VIP Technology
Contoured therapy seats and adjustable massage jets help you find relief from muscle aches and achieve peace of mind.
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AquaSpeed VSP™
With 25 speed settings, you can turn up the tempo for an interval workout or dial it in for endurance efforts.
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LED Lighting
Waterline LED lighting adds to the ambiance and overall enjoyment of your swim spa.
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Xtreme Therapy Cove
The Xtreme Therapy Cove features a unique jet pattern that targets back, hips, thighs, and calves. Use as a recovery tool or enjoy a therapeutic massage.
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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.
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Master Force 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.
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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.
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Master Blaster Foot Therapy System
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.
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Nonslip, Comfort Floor System
The Nonslip, Comfort Floor System offers safety and comfort with the unique combination of traction and cushion.
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Hydrotherapy
Contoured therapy seats and adjustable massage jets help you find relief from muscle aches and achieve peace of mind.
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Water Features
The waterfalls of your swim spa are soothing to watch and listen to, adding to the overall ambiance of your backyard.
Optional Features of the Challenger 21 D Swim Spa
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Fusion Air Sound System
Stream your favorite station or playlist via Bluetooth®. The hot tub stereo includes up to four interior, water-resistant speakers, and a subwoofer to maximize sound quality.
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Bluetooth Speaker
Whether you are hanging out with loved ones or want to create a moment of calm, the right playlist can help you set the mood. This sound system has 40W power and a bass boost with up to 10 hours of playtime. It’s designed to easily rest on the water features of the spa for superior sound quality.
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Mast3rPur
The Mast3rPur™ Water Management System reduces the amount of chemicals, like chlorine, that you need to use and keeps your spa water clean naturally.
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Axis Cover System
Whether you’re looking for a simple solution for handling your swim spa cover or if you want the best swim spa cover on the market, the Axis Cover System is the best choice.
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Heat Pump
Keep your H2X Fitness swim spa at your perfect temperature year-round while saving on your monthly energy bill. This technology, which connects to your spa’s plumbing, can efficiently heat or cool your water. The heat pump is a dealer-installed premium option.
SmartTub® System
Control Your Challenger 21 D Swim Spa From Anywhere
Connect via a smartphone app to monitor and control your hot tub from afar, with the SmartTub™ System.
Browse the H2X Challenger Series
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- H2X Challenger Series Collection
- 45 Jets
- Open Seating
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*Although the intention is to capture current incentives and prices as of the date of publication, pricing is subject to change without notice, and may not be accurate or completely current. While every reasonable effort is made to ensure the accuracy of this data, we are not responsible for any errors or omissions contained on these pages. Please verify any information in question with a sales representative. Information provided at this site does not constitute an offer or guarantee of available prices or financing. The estimated selling price that appears after calculating dealer offers is for informational purposes only. You may not qualify for the offers, incentives, discounts, or financing. Offers, incentives, discounts, or financing are subject to expiration and other restrictions. Contact Hot Tub Family to see if you qualify and for complete details of current offers. All product illustrations, prices and specifications are based upon current information at the time of programming. Although descriptions are believed correct, complete accuracy cannot be guaranteed. We reserve the right to make changes at any time, without notice or obligation, in the information contained on this site including and without limitation to prices, incentive programs, specifications, equipment, colors, materials, and to change or discontinue models. Images, pricing and options shown are examples, only, and may not reflect exact model color, options, pricing or other specifications.
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