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Medical Hot Spring 4™
Regular price
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$31,899
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52% OFF
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$16,800
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Doctor Based - The ONLY sauna 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 saunas come with a 3 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) 805-0026 with any questions you may have.
HANDCRAFT FROM SCRATCH
Comparison Table
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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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Exclusively on Icy Hot Spring 7™
21. Chromotherapy LED Lighting
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.
20. High Flow Hydrathreapy System
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
19. Reflexology Foot Therapy
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.
18. Ultimate Flow System
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.
Exclusively on Icy Hot Spring 5™
17. Full-Body Bubble Massage
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.
16. Precision Massage Zones
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.
15. Deep-Tissue Neck & Shoulder Massage
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.
Exclusively on Icy Hot Spring 4™
14. Deep Ergonomic Seating Design
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.
13. Commercial-Grade Spa Construction™
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.
12. Premium Spa Insulation System™
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.
Exclusively on Icy Hot Spring 3™
11. 24/7 Circulation Pump™
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.
10. Energy Efficient Heating System™
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.
9. Clim8zone II Heat Pump Compatibility™
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.
Exclusively on Icy Hot Spring 2™
8. Balboa Smart Control Panel™
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.
7. Dual Filtration Filters
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.
6. Stainless Steel Jet Trim
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.
5. Ozone Water Purification System™
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.
4. UV Water Treatment System
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.
3. Anti-Freeze Protection
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.
2. Auto Air Escape
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.
1. Silent 250W Circulation Pump
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.
The science is overwhelming.
The results are life-changing.
Every benefit below is drawn from published, peer-reviewed medical studies. This isn't marketing — it's decades of documented science.
+530%
Norepinephrine & Focus Surge
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%
Depression Symptom Reduction
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)
+40%
Brown Fat & Metabolic Rate
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
+250%
Dopamine — Lasting for Hours
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
+36%
Faster Sleep Onset
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
30–40%
Arthritis & Joint Pain Relief
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
Benefit #1 — Hot Mode
Cardiovascular Health & Longevity
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.
- Reduces arterial stiffness — a key marker of cardiovascular aging
- Improves endothelial function comparable to exercise training
- After 8 weeks, cardiovascular improvements matched those of sedentary adults who began an exercise program
- Associated with 65% lower risk of Alzheimer's disease and 66% lower risk of dementia over a 20-year Finnish cohort
- Reduces CRP — the primary circulating inflammation marker
BENEFIT #2 — COLD MODE
Mental Health & Mood Elevation
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.
- 530% increase in norepinephrine — sharper focus and mental clarity for hours
- 250% increase in dopamine — sustained motivation and mood elevation
- Brain fMRI data confirms structural changes in emotional regulation after regular cold immersion
- 59% of regular users report meaningful reduction in depressive symptoms
- Used by elite athletes and military personnel as a core mental performance tool
Benefit #3 — Hot Mode
Sleep Quality & Recovery
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.
- Accelerates sleep onset — falling asleep up to 36% faster in clinical trials
- Increases slow-wave (deep) sleep duration — the most restorative sleep stage
- Reduces nighttime waking and improves overall sleep efficiency
- Reduces cortisol levels — promoting calm before bed
- Hydrotherapy jets relax muscle tension — removing physical barriers to sleep
- Regular use associated with reversal of insomnia symptoms in multiple studies
Every Other Documented Benefit
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 4™ is the smart step up: the entry models cover the essentials, but the 4 is where the build changes. Advanced jet zoning, commercial-grade construction, energy-efficient heating, and full-perimeter insulation all come standard — upgrades most spa lines reserve for their top-of-range, or never offer at all. You still get a hot tub and a cold plunge in one unit; you just get the version engineered to run hard, every day, for years.
THE INVESTMENT CASE
$15,249 is the upgrade that lasts.
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 4™ puts both in one unit, built at the tier made for heavy, year-round use.
Premium 4–5 person hot tub (other brand)
$6,000–$13,000
Separate cold plunge unit
$5,000–$12,000
Second electrical install (220V/120V)
$1,000–$2,500
Delivery (two units)
$700–$2,000
5 years of spa & cold-plunge memberships
$6,000–$12,000
5 years of energy (running two units)
$3,000–$6,000
5 years of chemicals, filters & covers (two units)
$2,000–$4,000
Separate maintenance on two units (5 yrs)
$2,000–$5,000
Repairs & service over 5 years
$1,500–$3,000
Total combined approach
$27,200–$59,500+
Icy Hot Spring 4™ — all-in-one
$15,249
You Save
Up to $44,000
COST OF OWNERSHIP
Two Therapies. Under $4.50 a Day.
$15,249 over 10 years of daily use comes out to about $4.20 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.
HEALTH ROI
The Cost of Not Having It
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 4™ is preventive medicine. The peer-reviewed studies above show it works. This is the investment that pays you back.
HSA / FSA ELIGIBLE
Tax-Advantaged Purchase
Because the Icy Hot Spring 4™ 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.
0% APR FINANCING
Own it for as little as $635/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 4™ WORKS
Two powerful therapies. One extraordinary tub.
Tap to feel the difference
104°F
Therapeutic heat • deep muscle relaxation • detoxification
The Icy Hot Spring 4™ operates in two distinct therapeutic modes — Hot Mode
and Cold Mode. Switch anytime from the touchscreen. Most families use Cold Mode
from May through September and Hot Mode from October through April.
The Icy Hot Spring 4™ operates in two distinct therapeutic modes — Hot Mode
and Cold Mode. Switch anytime from the touchscreen. Most families use Cold Mode
from May through September and Hot Mode from October through April.
PERFECT FOR FALL & WINTER
Hot Mode
80°F – 104°F · 29 Hydrotherapy Jets Active
Set the Icy Hot Spring 4™ to Hot Mode for a full-body clinical-grade hydrotherapy session. The 29 precision jets work every major muscle group while heat therapy activates your cardiovascular and recovery systems.
- Precise temperature control from 80° to 104°F
- 29 active hydrotherapy jets for full-body massage
- All 4 seats fully functional with targeted jets
- 40% lower all-cause mortality with 4–7x/week use
PERFECT FOR SPRING & SUMMER
Cold Mode
50°F – 72°F (10°C – 22°C) · All 4 Seats Available
In summer, switch to Cold Mode and enjoy 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.
- Integrated chilling system — no ice bags needed
- Cools to 50°F and maintains temperature precisely
- All 4 seats fully functional with targeted jets
- UV + Ozone filtration keeps cold water crystal clean
How modes work:
Hot and Cold modes are not used simultaneously — the tub operates in one mode at a time.
This is how you get maximum therapeutic benefit from each temperature. Switch seasonally (cold in summer, hot in winter) or any time you want a change — there is no restriction on how often you switch. Hot-to-cold in a single session is not supported because each mode requires all 470 gallons to reach a stable therapeutic temperature.
Life before. Life after.
WITHOUT THE ICY HOT SPRING 4™
- Hot tub unused 6 months a year Paying electricity to maintain a tub nobody touches insummer
- Cold plunge for one person Your family waits outside. The ritual never happens together.
- $450/month on wellness memberships Cryo clinics, spa clubs, physical therapy — costs that never end
- Poor sleep, stiff joints, high stress No consistent recovery practice means compounding health debt
- Seasonal health Hot therapy in winter. No therapy in summer. Half a year wasted.
- Wellness is a solo activity Nobody does it together. The habit never sticks.
WITH THE ICY HOT SPRING 4™
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Used every single day, all year Cold in summer. Hot in winter. Never covered and idle again.
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All 7 family members, simultaneously Everyone together. The ritual that actually becomes one.
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Under $0.50 per person per session Memberships cancelled. The spa pays for itself in under 2 years.
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36% faster sleep onset, documented Evening hot sessions. Better sleep within days. Every day.
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50% lower cardiovascular disease risk 4–7 sessions/week. The science is two decades of data.
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530% norepinephrine surge, every cold session Focus. Drive. Mood elevation that lasts for hours.
OUR MEDICAL TEAM
The only contrast therapy tub designed by doctors.
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
48
Doctors contributed to this design
Cardiologists · Pain Specialists · Physical Therapists, Surgeons · 100+ years combined
REAL CUSTOMER STORIES
What happens when you use it every day.
REAL, UNCENSORED, UNEDITED REVIEWS
To help you decide for yourself how effective Medical Hot Springs are,
we have listed real, uncensored reviews, emails and comments from customers
who have paid for and used them.
★★★★★
"As a cardiologist, I read every study on heat and cold therapy before I bought one. Fourteen months in, my resting heart rate is down, my sleep tracker numbers are way up, and I genuinely look forward to my evening contrast session. I've started recommending it to my own patients."
Dr. James W.
★★★★★
"We were paying for two spa memberships, a separate cold plunge club, and weekly PT. The Icy Hot Spring 7 replaced all of it inside the first month. The kids fight over who gets the next session and my husband finally stopped complaining about his back. Best single purchase we've made for the house."
Linda M.
★★★★★
"I have rheumatoid arthritis. Hot mode cuts my morning stiffness in half, and a cold session after a bad flare-up is honestly life-changing. Knocking off one star because the 220V install took longer than the install guy expected — but once it was running, zero regrets."
Robert P.
★★★★★
"I used to drive 35 minutes each way to a cold plunge studio three times a week. Now I roll out of bed and step into mine. Recovery from leg day is at least 30% faster, and I'm sleeping through the night for the first time in years. Honestly wish I'd bought it the day it came out."
Lisa E.
★★★★★
Started having brutal night sweats and broken sleep after 50. Hot mode three evenings a week, cold on weekends — my sleep is finally back. Four stars only because the cover is heavier than I'd like and switching modes takes about a day to fully stabilize. Results made me a believer anyway."
Priscilla R.
★★★★★
"We're both in our late 60s and our knees and shoulders had kept us out of the community pool for two years. The Hot Spring 7 changed our routine completely — 20 minutes together every evening, hot mode in winter, cold in summer. It's become our favorite hour of the day."
George & Helen K.
Medical Benefits of a
Medical
Hot
Spring
Watch how hot and cold therapy reduces inflammation, eases muscle soreness, and helps your body recover faster.
Frequently Asked Questions
ABOUT THE PRODUCT
Can I switch between hot and cold in the same session?
Yes — you set the temperature anywhere from 50°F to 104°F. Small changes happen quickly. A full swap
from
hot soak to ice plunge takes 1–2 days for the water to fully change over. Most owners
pick a mode per day or per season: hot one day, cold the next, or cold all summer, hot all winter.
How long should I stay in each mode?
Hot: 15–30 minutes is the typical session. Cold: start with just
1–3 minutes and build up — 5 minutes is plenty for most people, with 10 minutes as the
upper limit for experienced users. Always listen to your body and consult your doctor first if you have
cardiovascular conditions.
What does the science say about cold water immersion?
Cold water immersion has been studied for its effects on mood, alertness, and post-exercise recovery.
Many regular users describe feeling more energized after a cold plunge, with better sleep and faster
recovery from workouts. Individual results vary, and cold immersion is a tool used by athletes
worldwide.
How often should I use each mode?
Most healthy adults enjoy hot soaks several times a week and shorter cold sessions a few times a week.
Find a rhythm that works for your body — many owners hot soak in the evening to wind down, and cold
plunge a few times a week for a recovery boost. Always check with your doctor about what's right for you.
PURCHASE, DELIVERY & INSTALLATION
How much does it cost to run each month?
Comparable to running a refrigerator. Heavy-duty insulation and our high-efficiency cover keep energy
draw low. Most owners see only a small bump on their monthly electric bill.
How long until I can use it after delivery?
Most owners are soaking within 48 hours of delivery — that covers filling, heating, and
balancing the water. Cold mode takes a little longer on its first chill-down, but once it's there, you're
set.
What does the 5-year warranty cover?
Our 5-year tiered warranty is one of the strongest in the industry: 5 years
structure, 3 years parts, 1 year labor. If anything goes
wrong, we send a certified technician to your home — you ship nothing, lift nothing. Most claims resolved
within 2 weeks.
What kind of base does it need?
A flat, level surface that holds about ___ lbs when filled — a reinforced deck, concrete pad, or compacted gravel all work great.
We'll walk you through the right setup for your space before delivery. No surprises on the day.
ELECTRICAL & POWER
What are the electrical requirements?
The Icy Hot Spring 4™ runs on a dedicated 240V / 60A circuit protected by a Class A GFCI breaker, installed by a
licensed electrician. We send you the full electrical specs as soon as you order so your electrician can prep before delivery day.
Do I need GFCI protection for both 240V and 120V?
Yes — both. The main 240V service needs a Class A GFCI breaker, and the internal 120V
heat pump system needs its own GFCI protection not exceeding 5mA. Your electrician will
handle both as part of a code-compliant install.
What wiring needs to be run from my house?
One main 4-wire cable — Black, Red, White, Green — in minimum 6 AWG
copper
rated for 90°C. The white (neutral) wire is mandatory: even though the tub runs on 240V, the neutral
powers internal 120V components like the heat pump, ozonizer, and circulation pump.
Do I need a second line for the heat pump?
No. The 120V heat pump connects directly to the tub's internal control box (Port J33). Everything runs
off the single 240V cable you already installed — no second line from your house panel needed. Saves
you time and installation cost.
Where does the GFCI disconnect get installed?
Per National Electric Code: within sight of the tub and at least 5
feet
from the spa walls. Your electrician will install it in your main house panel or a dedicated sub-panel.
For your electrician — technical details
Key install specs to hand to your electrician:
- Torque: Main terminal block (TB1) to 27–30 in. lbs.
- Access: Remove the cabinet panel opposite the spaTouch 3 screen to reach the Balboa control box
- Conduit entry: 26mm hole at the bottom of the corner skirt panel closest to the box
- Bonding: Use the external bonding lug with #8 AWG solid copper to the spa's common bonding grid
- HiPot testing: Disconnect the slip terminal (green wires) from Port J11 before testing — reconnect after
- Power shedding: The 5.5kW heater auto-manages with the high-speed massage pump to keep total draw within the 60A breaker limit.
HEALTH, SAFETY & MAINTENANCE
Is it safe for people with health conditions?
Hot tubs are safe for many healthy adults. If you have any medical condition — heart
issues, high or low blood pressure, diabetes, pregnancy, or take any prescription medication —
please consult your doctor before using it. We also strongly recommend never using the
tub alone if you have a medical condition; always have someone nearby to supervise.
Can it be used outdoors year-round in cold climates?
Yes — it's built to be outdoor. Heavy insulation, freeze-protection sensors, and our high-efficiency
cover keep it running smoothly through every season. If you'll be away during a hard freeze, see our
winterizing note below.
What water care does it need?
Simple. Test strips, sanitizer as needed, and a full drain every few months. How much care it needs
depends on how often you use it. We include a starter kit and a step-by-step guide so you'll know
exactly
what to do.
Is it safe for kids and family use?
Built for the whole family. The water heats up to a maximum of 104°F — for children we
recommend a lower setting and shorter sessions. Children must be supervised by an adult at all
times — no exceptions. With basic safety in place, your hot tub becomes the favorite hangout
in
the house.
How much maintenance does a hot tub need?
Very little. A quick filter rinse, a deeper clean every so often, and a full drain every few months is
usually all it takes. Most owners are surprised how easy it is to keep their tub ready to enjoy.
How do I winterize it if I go away?
We recommend draining the system. It's easy to do, and we'll walk you through every step.
The information on this page is for general informational purposes only and is not intended as medical advice. The Icy Hot Spring 4™ 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.
NO MORE WAITING
Get your Icy Hot Spring 4™ today.
Jump back to the top, pick your Icy Hot Spring 4™, 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.
✓ Free shipping
✓ 0% APR financing available
✓ 5 years warranty included
Technical Specifications
Built different.
Spec'd different.
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 4™. Then we built it the way doctors would not the way margins would"
- Medical Saunas Engineering Team
Electrical Requirements
Power Supply:
220V–240V / 60Hz.
Maximum Current:
37A.
Maximum Power:
7,975 Watts.
Wiring:
4-wire (L1, L2, Neutral, Ground) using minimum 6 AWG copper.
Breaker:
60A Maximum Class A GFCI-protected.
Thermal Performance WORLD FIRST
Temperature Ranges:
High Range 80°F–104°F; Low Range 50°F–99°F.
Heater:
5.5 kW high-output Balboa heater.
Hybrid Ready:
Engineered for integration with Clim8zone II (4.0 kW heat / 1.6 kW cool).
Jet Configuration
Total Jets:
29 pieces with 304 Stainless Steel trim.
Breakdown:
3.5” (1), 3” (12), 2” (12), 1” circulation (4).
Adjustability:
Fully adjustable water flow via 1/4 turn rotation of the jet faces.
Pumps & Sanitation
Massage Pump:
1 × 2.2 kW (3 HP class) high-flow, UL-approved.
Circulation Pump:
1 × 250W (0.35 HP) energy-saving, UL-approved.
Filtration:
1 × paper filter; 24/7 silent filtration.
Sanitation:
1 × 50mg/h Corona Discharge Ozonizer with integrated injector and mixer.
Structure & Insulation
Dimensions:
2100 x 1700 x 850 mm.
Shell:
8mm USA Aristech Acrylics.
Shell Insulation:
25mm high-density PU foam.
Cabinet Insulation:
15mm aluminum foil on PS skirt panels.
Base Pan:
5mm heavy-duty ABS bottom base.
Systems & Lighting
Control System:
Balboa BP2000G1 with spaTouch 3 color touchscreen.
Lighting:
18 color-changing perimeter LEDs.
Wireless:
bwa™ Wi-Fi module included for smartphone management.
Chromatherapy:
Supports independent zones via CHROMAZON3™ logic.
Certifications
System Certification:
ETL Listed (Intertek) for North America.
Component Safety:
UL Approved pumps and heater.
Water Resistance:
IPX5 Rated (main spa unit).
ORDER WITH COMPLETE CONFIDENCE
Four reasons there's
zero risk to ordering today.
5-Year Warranty
Labor covered for 1 year, parts for 3 years, and the structure for a full 5 years. If anything ever comes up, don't worry! We've got you covered.
Support Team
Real people, ready to help. Call (818) 722-6231 Monday – Friday,
8AM – 5PM PST. Questions before, during, or after your purchase —
we’re here for you.
0% APR Financing
Own it for as little as $333/month with 0% APR on approved credit.
Same-day approvals. HSA and FSA accepted. Start soaking now,
pay over time.
Free Shipping
Free shipping straight to your door from our Los Angeles facility. No surprise fees, no hidden costs.
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