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Customer Support: (818) 962-0774
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Doctor Based - The ONLY hot spring designed by doctors. Made to improve blood flow, reduce headaches and migraines, heal your muscles, and achieve absolute pain relief for a better night's sleep.
Limit 2 per customer: Limited quantities available. Any orders greater than 2 will automatically be refunded.
All of our hot springs come with a 5 year warranty included FREE.
The price is heavily discounted for the month of June. Purchase now while prices are still low. Every 2 weeks the price will increase because our supplies are very limited. Enjoy the deals and call us at (818) 962-0774 with any questions you may have.
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| Model | Medical Spring 2™ | Medical Spring 3™ | Medical Spring 4™ | Medical Spring 5™ | Medical Spring 7™ |
| Capacity | 2 people | 3 people | 4 people | 5 people | 7 people |
| Temperature Range | 50-104°F | 50-104°F | 50-104°F | 50-104°F | 50-104°F |
| Number of Jets | 49 | 31 | 29 | 65 | 100 |
| Hybrid Hot + Cold System™ | Hot + Cold | Hot + Cold | Hot + Cold | Hot + Cold | Hot + Cold |
| Jet Zone Control™ | Basic | Basic | Advanced | Premium | Ultimate |
| Independent Massage Pumps | 1 | 1 | 1 | 2 | 3 |
| Interior LED Lights | |||||
| Balboa Smart Control Panel™ | |||||
| Heavy Duty Acrylic Shell | |||||
| UV Water Treatment System | |||||
| Ozone Water Purification System™ | |||||
| Stainless Steel Jet Trim | |||||
| Silent 250W Circulation Pump | |||||
| Auto Air Escape | |||||
| Anti-Freeze Protection | |||||
| Water-Shortage Proetection | |||||
| Fully Adjustable Jets | |||||
| Dual Filtration Filters | |||||
| High-Density PU Foam Insulation | |||||
| ETL Listed & UL-Approved | |||||
| Maintenance-Free Cabinet | |||||
| Smart Temperature Control™ | - | ||||
| 24/7 Circulation Pump™ | - | ||||
| Clim8zone II Heat Pump Compatibility™ | - | ||||
| Energy Efficient Heating System™ | - | - | |||
| Premium Spa Insulation System™ | - | - | |||
| Enhanced Jet Power™ | - | - | |||
| Commercial-Grade Spa Construction™ | - | - | |||
| Ultimate Performance System™ | - | - | |||
| Precision Massage Zones | - | - | - | ||
| Deep-Tissue Neck & Shoulder Massage | - | - | - | ||
| Full-Body Bubble Massage | - | - | - | ||
| Custom-Flow Air System | - | - | - | - | |
| Chromotherapy LED Lighting | - | - | - | - | |
| Reflexology Foot Therapy | - | - | - | - | |
| Ultimate Flow System | - | - | - | - | |
| Exterior Dimensions (LWH) | 76.8 × 55.1 × 29.7" | 78.7 × 63.0 × 34.6" | 82.7 × 66.9 × 33.5" | 86.6 × 86.6 × 37.8" | 90.6 × 90.6 × 37.4" |
| Watts | 8,375 W | 7,975 W | 7,975 W | 10,875 W | 13,075 W |
| Operating Voltage | 220–240V/60AMP GFCI | 220–240V/60AMP GFCI | 220–240V/60AMP GFCI | 220–240V/60AMP GFCI | 220–240V/60AMP GFCI |
| Required Wire Type | Hardwired,6 AWG Copper,90°C rated | Hardwired,6 AWG Copper,90°C rated | Hardwired,6 AWG Copper,90°C rated | Hardwired,6 AWG Copper,90°C rated | Hardwired,6 AWG Copper,90°C rated |
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Light shapes the entire mood of the water. Color-changing lighting across multiple zones bathes the tub in rich, shifting color, cycling through a full spectrum from the touchscreen — turning every session into an atmosphere, not just a soak.
Our high-flow hydrotherapy system is engineered to deliver powerful, consistent water pressure across every massage zone, ensuring each jet performs at its full potential. The result is deeper muscle relief, broader body coverage, and a more immersive therapeutic experience that works the way true hydrotherapy should
Your feet carry you through everything and most spas ignore them completely. A dedicated footwell pod sends a steady, working stream to the soles of your feet, reaching the pressure points a standard seat jet never could — relief for tired, aching feet that you feel the moment you settle in.
The pinnacle of the lineup. All 100 jets run in concert, choreographed across every seat for the most complete, powerful full-body hydrotherapy session Medical Saunas builds — the reason the Spring 7 sits at the top.
A different sensation entirely. A wash of fine air bubbles rises around you from below, wrapping the whole body in a lighter, all-over massage that plays alongside the directional jets — two therapies layered into one session.
This is hydrotherapy designed by people who understand the body. Jets are mapped into deliberate groupings that target specific muscle regions, so every seat delivers a distinct, purpose-built massage — not a random spray, but a session engineered to hit exactly where it counts.
Tension lives in the neck and shoulders, and that’s exactly where this concentrates. Precisely positioned jets channel strong, focused pressure into the spots that carry the weight of a long day, working out the knots a generic jet layout leaves untouched.
Our contoured seats are precision-designed to support your body's natural curves, ensuring every jet hits exactly where it needs to. Built for comfort during long sessions, whether hot or cold, every seat feels like it was made specifically for you.
Built to the same durability standard as commercial installations that run all day, every day. For a busy household, that means a tub engineered to absorb heavy, repeated use across the whole family for years without missing a beat.
Most spas insulate the shell and stop there. Ours wraps full-perimeter insulation across both the shell and the cabinet, sealing heat in far longer than partial setups — which means lower energy draw and water that stays at temperature between sessions.
Round-the-clock circulation means the water is always filtered, always evenly heated, and always ready. No waiting on a programmed cycle to kick in — the tub maintains itself continuously so it’s perfect whenever the mood strikes.
Performance and efficiency don’t have to trade off. Our heating system reaches and holds temperature on noticeably less power, trimming the real cost of running a large tub every day of the year — so the experience stays premium and the bill stays reasonable.
This is what makes true year-round dual therapy possible. Paired with the Clim8zone II heat pump, the tub heats faster and chills all the way down to genuine plunge temperatures — the technology that turns a hot tub into a full hot-and-cold system.
While competitors hand you a basic button pad, we built ours around the industry-leading Balboa control system. Temperature, jets, modes, and lighting all live under one intelligent touchscreen, giving you precise command over every part of the experience from a single, intuitive panel.
Two filters working together capture more debris than a single filter ever could, keeping the water cleaner and stretching the time between cleanings. Less maintenance, clearer water, a tub that’s always ready to go.
Look closely at a budget spa after a year and you’ll see it: yellowed, cracking plastic jet faces. Ours are finished in 304 stainless steel that resists corrosion and keeps its polished, premium look for the life of the tub. A small detail that says everything about how it’s built.
Water care is the part of spa ownership most people dread. Our automatic ozonizer works around the clock to break down contaminants at the molecular level, keeping the water crystal clear and fresh between drains with a fraction of the hands-on upkeep ordinary tubs demand.
Clean water shouldn’t mean a cabinet full of chemicals. As water circulates, UV-C light neutralizes microorganisms on contact, doing the heavy lifting of sanitation continuously and quietly — so you spend less on chemicals and more time actually using your tub.
Built for the climates that punish ordinary tubs. Freeze sensors keep water moving the instant temperatures dip toward freezing, protecting the plumbing through the hardest winters so your tub is ready the morning after a cold snap, not cracked and out of service.
Trapped air is what leaves cheaper jets sputtering at startup. Our system bleeds it out automatically the moment you power on, priming every jet to full, even pressure from the very first second of your session.
Continuous filtration usually comes with a constant drone. Our low-draw 250W circulation pump runs day and night to keep the water filtered and evenly conditioned — without the hum, so the only thing you hear is the water itself.
Every benefit below is drawn from published, peer-reviewed medical studies. This isn't marketing — it's decades of documented science.
Cold water immersion at 57.2°F increases plasma norepinephrine by 530% — the neurotransmitter responsible for alertness, attention, and focus. The effect begins within minutes and lasts for hours after stepping out.
Srámek et al. · Journal of Applied Physiology · 2000 · head-out cold water immersion study
59% of regular cold water immersion users reported a significant reduction in depressive symptoms. A brain fMRI study confirmed CWI shifts the positive-to- negative affect ratio from 1.75 to 3.0 — the threshold of psychological flourishing.
Yankouskaya et al. · Biological Psychiatry · 2023 · brain fMRI study (PMC9953392)
Cold exposure activates brown adipose tissue (BAT), increasing metabolic rate and improving glucose regulation. Your body burns calories generating heat — and the thermogenic effect continues for hours after each cold session.
Hanssen et al. · Journal of Clinical Investigation · brown adipose tissue activation
Cold water immersion increases dopamine levels by 250% — and unlike the brief spike from stimulants, the elevation persists for hours. Better motivation, mood, and drive, triggered naturally by your tub every session.
Srámek et al. · J Applied Physiology · 2000 · plasma catecholamine response to cold immersion
Hot water immersion 1–2 hours before bed accelerates sleep onset by 36% and significantly improves slow- wave deep sleep. The mechanism — core temperature drop triggering the brain's sleep signal — is one of the most reliable biological switches known to medicine.
Haghayegh et al. · Sleep Medicine Reviews · 2019 · 17-study systematic review
Hot water reduces joint stiffness by 30–40% in arthritis patients. The Arthritis Foundation officially recommends hydrotherapy as a first-line treatment. Warm water buoyancy reduces joint loading by up to 90% compared to land-based therapy.
Arthritis Foundation · hydrotherapy clinical guidelines · supported by multiple RCT data
DEEP – DIVE THE RESEARCH
The most comprehensive long-term research on passive heat therapy comes from Finland. In a landmark 20.7-year study published in JAMA Internal Medicine, researchers followed 2,315 middle-aged men and found a clear dose-dependent relationship: the more often they used heat therapy, the longer they lived.
A 2025 systematic review confirmed hot water immersion reduces systolic blood pressure by 6–7 mmHg for a full 24 hours after a single session. A 10 mmHg reduction is associated with a 20% reduction in major cardiovascular events.
Cold water immersion triggers one of the most powerful neurochemical responses available without medication. Within minutes, the brain floods the body with norepinephrine and dopamine — the neurotransmitters at the center of attention, motivation, and mood.These elevations last for hours after you step out of the water.
A 2023 fMRI study demonstrated that cold water immersion shifts the brain's positive-to-negative affect ratio from 1.75 to 3.0 — crossing the threshold associated with psychological flourishing. Regular users show sustained reductions in depressive symptoms, anxiety, and chronic stress.
Hot water immersion in the evening is one of the most evidence-backed sleep interventions available. When your body exits warm water, your core temperature drops — sending a powerful biological signal to initiate sleep. Sleep researchers call this the "warm bath effect."
A 2019 systematic review of 17 studies found that a warm bath 1–2 hours before bed at 104 - 107.6°F for just 10 minutes significantly improved sleep onset, sleep quality, and slow-wave deep sleep — by accelerating the natural nocturnal drop in core body temperature.
Click any card to view the published research
Cardiovascular statistics drawn from Finnish sauna and passive heat therapy research. Cold water immersion statistics from clinical CWI studies. Consult your physician before beginning any thermal therapy routine.
Here is The Math
Why the Hot Spring 3™ is the smart step up: the 2 gets you into hot + cold therapy, but the 3 is where the tub starts running itself. Round-the-clock circulation keeps the water filtered and ready without waiting on a timed cycle, Smart Temperature Control holds your setting precisely, and Clim8zone II compatibility unlocks faster heat and genuine plunge-cold temperatures — the upgrade that makes true year-round dual therapy possible. Three seats, both therapies, one unit; the features that make daily use effortless are built in.
Most people who want both hot and cold therapy at home end up buying two separate machines — and paying twice for everything around them. The Icy Hot Spring 3™ puts both in one unit, with the circulation, control, and heat-pump upgrades that make year-round use effortless.
$12,249 over 10 years of daily use comes out to about $3.40 a day — for a hot tub and a cold plunge in one unit, at home, whenever you want them. No gym membership, no spa club, no cold-plunge studio comes close.
One chronic health event — a cardiac episode, a series of physical therapy visits, ongoing sleep medication — can easily cost $10,000–$50,000. The Icy Hot Spring 3™ is preventive medicine. The peer-reviewed studies above show it works. This is the investment that pays you back.
Because the Icy Hot Spring 3™ is designed for documented medical and therapeutic purposes, many customers use HSA or FSA funds toward their purchase. Call us for supporting documentation. 0% APR financing available — most approvals are same day.
Own it for as little as $510/month with 0% APR on approved credit. Same-day approvals. HSA and FSA accepted. Start soaking now, pay over time.
HOW THE ICY HOT SPRING 3™ WORKS
80°F – 104°F · 31 Hydrotherapy Jets Active
Set the Icy Hot Spring 3™ to Hot Mode for a full-body clinical-grade hydrotherapy session. The 31 precision jets work every major muscle group while heat therapy activates your cardiovascular and recovery systems.
50°F – 72°F (10°C – 22°C) · All 3 Seats Available
In summer, switch to Cold Mode for therapeutic cold-water immersion — what elite athletes and longevity researchers call the single most powerful recovery tool available. No ice required. No separate unit. Just set the temperature and step in.
Used every single day, all year Cold in summer. Hot in winter. Never covered and idle again.
All 3 family members, simultaneously Everyone together. The ritual that actually becomes one.
Under $0.50 per person per session Memberships cancelled. The spa pays for itself in under 2 years.
36% faster sleep onset, documented Evening hot sessions. Better sleep within days. Every day.
50% lower cardiovascular disease risk 4–7 sessions/week. The science is two decades of data.
530% norepinephrine surge, every cold session Focus. Drive. Mood elevation that lasts for hours.
What changes the day the Icy Hot Spring 3™ arrives.
Hot tub unused 6 months a year
Paying electricity to maintain a tub nobody touches in summer.
Used every single day, all year
Cold in summer. Hot in winter. Never covered and idle again.
Cold plunge for one person
Your family waits outside. The ritual never happens together.
All 5 family members, simultaneously
Everyone together. The ritual that actually becomes one.
$450/month on wellness memberships
Cryo clinics, spa clubs, physical therapy — costs that never end.
Under $0.50 per person per session
Memberships cancelled. The spa pays for itself in under 2 years.
Poor sleep, stiff joints, high stress
No consistent recovery practice means compounding health debt.
36% faster sleep onset, documented
Evening hot sessions. Better sleep within days. Every day.
Seasonal health
Hot therapy in winter. No therapy in summer. Half a year wasted.
50% lower cardiovascular disease risk
4–7 sessions a week. The science is two decades of data.
Wellness is a solo activity
Nobody does it together. The habit never sticks.
530% norepinephrine surge, every cold session
Focus. Drive. Mood elevation that lasts for hours.
We worked with cardiologists, surgeons, physical therapists, pain specialists, and recovery doctors. Every temperature protocol and every feature is based on documented medical research — not marketing
The information on this page is for general informational purposes only and is not intended as medical advice. The Icy Hot Spring 7™ is a wellness product, not a medical device, and is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Always consult your physician before using a hot tub or cold plunge, especially if you have any medical condition, are pregnant, take prescription medication, or are caring for a child. All electrical work must be performed by a licensed electrician in accordance with the National Electric Code (NEC) and local regulations.
Jump back to the top, pick your Icy Hot Spring 3™, and start feeling better this weekend — deeper sleep, faster recovery, and the contrast therapy your body has been missing. No long wait, no complicated setup.
Every number below reflects a medical engineering decision. When 48 doctors sign off on a spec sheet, the result looks different from what accountants build.
"We reviewed every major hot tub brand's specifications before designing the Icy Hot Spring 3™. Then we built it the way doctors would — not the way margins would."
- Medical Saunas Engineering Team
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* The pictures and diagrams displayed on the website represent our saunas. However, the actual model may differ. Please note that the design and construction may be subject to changes to enhance the quality of the sauna. If you apply for financing, it is based on approved credit, taxes and fees may apply.
† All photos, digital art, names, logos, and brands are property of their respective owners. All photos, digital art, company, product and service names used in this website are for informational purposes only. These images are digital enhanced artwork. Actual product may look different. Use of these names, artwork, logos, photos and brands does not imply any kind of endorsement.
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