Sun Home cold plunges compared (2026): prices, specs, and how to get $200 off

Sun Home sells five cold plunges from $3,799 to $15,199, and they split cleanly into two very different products: inflatable tubs with a separate chiller, and hard-shell stainless steel Pro Series plunges.

This guide puts all five side by side with current prices, your price with our code, and the specs that actually decide which one fits.

Our code WELLWORTHIT saves you $200 on any order over $4,000. We tested it in a live Sun Home cart on 11 September 2026. It works on sale prices, and there’s a simple trick that unlocks it on the two cheaper tubs.

Specs are from Sun Home’s product pages, checked 11 September 2026. This is our buying guidance.

Your price with code WELLWORTHIT

Save $200 on Sun Home cold plunges with code WELLWORTHIT →

The $49 trick for the Horizontal

The Horizontal costs $3,999 — one dollar under the code’s $4,000 minimum. On its own, the code won’t apply. We checked.

Add the $49 Cold Plunge Filter 3-pack and here’s what happened in our cart:

You pay $151 less and get three replacement filters. Sun Home recommends changing filters every 2–4 weeks, so you’d be buying them within a month anyway. There is no reason to buy the Horizontal without doing this.

For the Vertical ($3,799), you need to add at least $201 to clear the minimum. One filter pack isn’t enough on its own. Adding one of Sun Home’s recovery add-ons, like the $299 Theragun Sense, takes the subtotal to $4,098 — at which point the code knocks $200 off and that add-on effectively costs you $99.

Inflatable vs Pro Series — the real decision

This matters more than any spec difference within each group.

Buy inflatable if you’re establishing a cold-plunge habit, renting, or want to move it later. You get a genuinely cold plunge for a quarter of the price.

Buy Pro Series if you already plunge regularly and want something permanent, better sanitised, and built to last outdoors. The stainless basin and UV sanitation are the real upgrades. The extra 4°F of cold is not.

About “28°F”

Every Pro Series listing says 28°F. Worth understanding what that means.

Fresh water freezes at 32°F. A plunge can’t hold liquid water at 28°F. What the setpoint does is run the chiller cold enough to form ice in the tub — Sun Home describes thick, floating ice — while the surrounding water sits at about freezing.

It’s a real capability, and a genuine ice bath. It’s also colder than almost anyone needs. Most people plunge well above freezing, commonly in the 40s and 50s °F. Don’t buy a Pro Series for the number.

The Pro Series, model by model

Cold Plunge Pro — $13,999, $13,799 with code

• 150 gallons, 78.7” L × 33.5” W × 34.2” H, 400 lb empty
• 316 stainless basin, injected insulation, insulated lid, headrest, stair mats
• Ozone, UV and dual-pump filtration; touchscreen and Wi-Fi app; colour interior lighting
• Dedicated 120V/15A GFCI, standard NEMA 5-15 plug — no hardwiring
• Indoor or outdoor, though Sun Home notes it can’t run in sub-freezing outdoor temperatures

The sensible Pro Series choice. You get every meaningful upgrade over the inflatables — stainless, UV, permanence — without paying for extra gallons. Full Pro review →

Cold Plunge Pro Apex — $14,999, $14,799 with code

• 180 gallons, 71.5” L × 30.75” W × 60.5” H, 528 lb empty
• Same stainless build, sanitation, controls and standard plug as the Pro

The Apex trades length for height: it’s shorter and narrower than the Pro but nearly twice as tall, holding 30 more gallons. That means a smaller footprint on the floor and deeper water. Measure your step-in height and any overhead clearance — it ships with stair mats for a reason. Full Pro Apex review →

Cold Plunge Pro Titan — $15,199, $14,999 with code

• 238 gallons, exterior 92.9” × 36.6” × 40.7”, interior 59” × 28.7” × 33.4”
• Built-in interior bench, small waterfall feature, interior lighting
• Dual hair filter plus 10 × 4.5 dust filter, ozone, UV, dual water pumps, dual power supply, ice-making

The biggest tub, and the only one with seating inside. The dual power supply is the thing to check: confirm with Sun Home exactly what electrical supply the Titan needs before you order, as it may differ from the single standard outlet the others use. Full Pro Titan review →

The inflatables, model by model

Cold Plunge Horizontal — $3,999, $3,848 with filter pack + code

• Inflatable tub 6.4 ft × 2.3 ft × 2.1 ft, 80–90 gallons, full recline
• Smart chiller 21.2” × 15.7” × 21.7”, cools to 32°F and heats to 107°F
• Ozone sanitation, 20-micron sediment filter plus metal inlet screen
• Wi-Fi app (2.4 GHz) via the Sun Home Saunas or Tuya app; insulated tub and lid
• 120V/15A dedicated GFCI circuit, NEMA 5-15 plug; 1-year warranty

The value pick in the whole lineup — and with the filter-pack trick, the cheapest way to get a Sun Home chiller. Full Horizontal review →

Cold Plunge Vertical — $3,799

• Puncture-resistant inflatable, 35.4” × 35.4” × 35.4”, 106 gallons
• Cools to 32°F, heats to 107°F; ozone, metal mesh plus 20-micron paper filter
• Wi-Fi app with live flow-rate readout and child lock
• Tub 15.5 lb, chiller 88 lb; carrying case and repair kit included
• 120V/15A GFCI, standard plug; 1-year warranty

A seated, upright soak with the smallest footprint of any Sun Home plunge — and, interestingly, more water than the Horizontal. Choose it for a tight corner or a balcony; choose the Horizontal if you want to lie back. Full Vertical review →

Before you buy any cold plunge

Check the floor load. Water weighs about 8.3 lb per gallon. A filled Pro is roughly 1,650 lb, a filled Pro Apex roughly 2,030 lb, and even the Vertical carries about 880 lb of water. On an upper floor or a deck, confirm it can take the weight.

Plan the drain. You’ll change the water every few weeks on the inflatables. Sun Home recommends drainage nearby for the Pro Series.

Leave airflow. For the Pro Series, Sun Home asks for 12 inches at the sides and 36 at the front.

Budget for filters. Every 2–4 weeks on the inflatables; at least monthly on the Pro Series, every two weeks if you plunge daily.

Expect a first cool-down of hours, not minutes. Sun Home quotes 6–8 hours for the Pro Series, faster with the lid on.

What cold immersion actually does

Conservatively: cold water immersion is associated with reduced perceived muscle soreness after hard exercise, and many people find it improves alertness and mood in the short term. It’s also a hard, deliberate habit, which is part of the appeal.

Two cautions worth knowing. Research suggests regular cold immersion straight after strength training may blunt muscle-building adaptations — if building muscle is your goal, separate the plunge from your lifting session. And the initial cold shock is a genuine cardiovascular stress: it spikes heart rate and breathing.

Don’t plunge alone, keep early sessions short, and never plunge after drinking. If you have a heart condition, high blood pressure, Raynaud’s, are pregnant, or take medication affecting circulation, speak to a doctor before starting.

The summary

• Establishing the habit on a budget: the Horizontal, and add the $49 filter pack — $3,848.
• Tight space, seated soak: the Vertical.
• Permanent, best value in stainless: the Pro — $13,799.
• Deeper water, smaller floor footprint: the Pro Apex — $14,799.
• The biggest, with a bench: the Pro Titan — $14,999, after confirming its electrical needs.

Pairing a plunge with a sauna? See our Sun Home sauna comparison. Every price with the code is on our WELLWORTHIT page.

Shop Sun Home cold plunges and save $200 with WELLWORTHIT →

Comparing Sun Home with Plunge Chill and budget ice tubs? See our best cold plunge guide.