An inflatable whirlpool hot tub can bring warm, bubbling water to your patio without the cost or permanent installation of a built-in spa. The right choice depends on how many people will use it, how much room you have, and how well the tub holds heat. These five models offer different strengths, from a compact two-person design to roomy square tubs for groups. Compare their size, jet setup, insulation, and included accessories before choosing.
Table of Contents
Quick Comparison
| Hot Tub | Capacity | Jets | Standout Feature |
|---|---|---|---|
| SunSwell 73-Inch Square Inflatable Hot Tub | 4–6 people | 130 air jets | Two covers and four replacement filters |
| CO-Z 6-Person Square Inflatable Hot Tub | Up to 6 adults | 114 air jets | Large square layout and reinforced structure |
| RELXTIME Two-Person Oval Inflatable Hot Tub | 2 people | 100 air jets | Compact oval footprint |
| Bestway SaluSpa Hot Springs Round Inflatable Hot Tub | 2–4 people | AirJet bubble massage | Insulated walls, Freeze Shield, and timer |
| SunSwell 71-Inch Round Inflatable Hot Tub | Listed as 4 people; description also says 4–6 | 120 air jets | Insulated cover and GFCI protection |
Our Picks: Best Inflatable Whirlpool Hot Tub reviews
SunSwell 73-Inch Square Inflatable Hot Tub: Best for Flexible Group Use
The SunSwell is a square, portable spa designed for four to six people. Its 130 air jets create a bubbling massage, while the temperature control lets you set the water up to 104°F. The square shape can make it easier to arrange seating than a round tub, though the available space still needs to suit your patio or indoor setup.
Two covers are included for different needs: an inflatable cover intended to help with heating and keep out dust, and an insulated cover with a child-safety lock to help retain warmth. The laminated PVC construction is designed to resist punctures, and the package includes a ground mat, cup holder, inflatable hose, and four replacement filters. The stated filter service life is 168 hours per cartridge, so you will need to track use and replace them on time.
This is a useful pick if you want a larger tub with more included filter replacements than the other options here. One trade-off is that the product details do not give a water capacity or heater wattage, making it harder to estimate filling and heating time compared with the CO-Z and Bestway models.
Pros:
- 130 air jets for a full-tub bubble effect
- Two covers support heating and heat retention
- Four replacement filters and a ground mat are included
- Temperature adjusts up to 104°F
Cons:
- Water capacity and heater wattage are not specified in the supplied product details
- A 4–6-person tub needs more space than a compact two-person model
Verdict: Choose the SunSwell 73-inch model if you want a square group spa with plentiful jets and a useful set of included accessories.
CO-Z 6-Person Square Inflatable Hot Tub: Best for a Spacious Layout
With a listed footprint of 78.7 by 78.7 inches and a capacity of 336 gallons, the CO-Z is the largest-capacity option in this group. Its square shape is designed to give up to six adults room to stretch out. The tub has 114 air jets, a 650W massage pump, and a 1350W heater that warms water up to 104°F.
The reinforced structure uses industrial-grade PVC mesh and a heavy-duty inner composite layer. The brand says this construction helps the tub resist punctures and hold its shape, including around the rim. The included kit contains a thermal cover, ground mat, four safety keys, two filter cartridges, and setup hoses. A digital control panel manages the temperature and bubbles.
The generous capacity is appealing for group use, but it also means there is more water to heat and maintain. The product information specifically notes that cold water takes longer to heat in winter and recommends keeping the thermal cover on. The company also advises against filling the tub above 104°F or pouring boiling water into it.
Pros:
- Large square layout designed for up to six adults
- 336-gallon capacity and 114 air jets
- Thermal cover and ground mat are included
- Reinforced construction is designed for added puncture resistance
Cons:
- Its large footprint and water capacity may not suit smaller patios or quick heat-up expectations
- Only two filter cartridges are included
Verdict: The CO-Z is a strong fit for shoppers who prioritize group space and a reinforced square design over a smaller, faster-to-fill tub.
RELXTIME Two-Person Oval Inflatable Hot Tub: Best for a Compact Spa Space
The RELXTIME is a two-person oval spa with 100 air jets. Its smaller intended capacity makes it a practical option for couples or anyone who does not need a large family tub. A built-in digital control panel operates the temperature and bubble settings, and the laminated PVC body is designed to be lightweight and puncture resistant.
The product description highlights insulation intended to retain heat and reduce energy use. It also notes that heating can take longer in cold weather and recommends adding a thick ground mat, which is not included. Unlike several other picks, the supplied details do not state the maximum temperature, heater wattage, water capacity, or what accessories come in the box.
That missing information makes it harder to compare running needs and setup requirements before buying. Still, its two-person format and oval shape may be easier to accommodate than the square group models, provided you have enough room for the tub and its pump.
Pros:
- Compact two-person design
- 100 air jets for a bubbling massage
- Digital controls manage heat and bubbles
- Laminated PVC construction is designed for durability
Cons:
- A ground mat is recommended but not included
- Temperature range, capacity, and included accessories are not specified in the supplied details
Verdict: Consider the RELXTIME if you want a compact two-person spa, but confirm the full specifications and included equipment before ordering.
Bestway SaluSpa Hot Springs: Best for Insulation Features
The Bestway SaluSpa Hot Springs is a 71-inch round tub designed for two to four adults. It holds 177 gallons and uses an AirJet bubble system for massage. Its EnergySense insulated walls and cover are described as up to 40% more energy-efficient than similar hot tubs, while the internal beams are designed to help the tub retain air pressure and stability.
The multi-function pump handles inflation, heating up to 104°F, and filtration. A power-saving timer lets you schedule the water temperature up to 40 days ahead, and Freeze Shield is designed to help protect the pump and liner in cold conditions. The set also includes a cover, filter cartridge, ChemConnect chemical dispenser, and repair patch. The manufacturer warranty is listed as one year for the heater pump and 180 days for other parts, including the liner.
This model stands out for its insulation and pump-protection features, but it has fewer stated jets than some competitors—the product details describe an AirJet bubble massage without giving a jet count. It is also smaller than the CO-Z, making it a better match for a smaller group than for frequent six-person use.
Pros:
- Insulated walls and cover are designed to reduce heat loss
- Freeze Shield and a timer add useful temperature-management features
- 177-gallon capacity suits a smaller group
- ChemConnect dispenser and repair patch are included
Cons:
- Designed for up to four people rather than a larger group
- The supplied product details do not state a specific AirJet count
Verdict: The Bestway SaluSpa is a good choice if heat-retention features, a scheduling timer, and a stated warranty matter more to you than maximum capacity.
SunSwell 71-Inch Round Inflatable Hot Tub: Best for a Round Four-Person Spa
This 71-inch round SunSwell model is listed as a four-person tub, although its description also says it can comfortably seat four to six people. Because those capacity claims differ, it is safest to think of it as a four-person option and check the dimensions against your intended use. The tub has 120 bubble jets powered by a 600W motor, laminated PVC construction, and a removable filtration system.
The insulated cover has a child-safety lock and is intended to retain heat and keep debris out. GFCI protection is also listed as a safety feature. The product description recommends filling the tub with warm water to reach 104°F more quickly, but the supplied information does not give the water capacity or heater wattage. As with any inflatable spa, actual heating time can depend on the starting water temperature and surrounding conditions.
Compared with the 73-inch SunSwell, this model has a round shape and fewer air jets, but it may be easier to fit in a space where a square tub is awkward. The package is described as complete, but the provided details do not list every accessory included.
Pros:
- 120 bubble jets for a relaxing massage effect
- Round design may suit some patios better than a square tub
- Insulated cover includes a child-safety lock
- GFCI protection and removable filtration system are included features
Cons:
- Capacity is described inconsistently as four people and four to six people
- Water capacity and heater wattage are not specified in the supplied details
Verdict: Pick this SunSwell if you prefer a round tub with 120 jets, but plan around a four-person fit unless you can verify the available interior space.
How to Choose an Inflatable Whirlpool Hot Tub
Match the Capacity to Your Usual Group
Think about how many people will use the tub most of the time, not just the maximum capacity in the listing. A two-person model can take up less room and avoid heating extra water, while a larger tub gives groups more space. Capacity descriptions can be optimistic or inconsistent, so compare the tub’s dimensions with the room you want for each person.
Measure the Setup Area
Measure the available space before choosing a round, oval, or square design. Leave room for the tub’s pump and access for setup and maintenance. Also consider the filled tub’s weight and follow the manufacturer’s instructions about placement and support. A ground mat is included with some models here, but not all.
Understand Air Jets and Massage Feel
These products use air jets to create bubbles. They are not the same as the directed water jets found in many permanent spas, so choose one for a bubbling massage rather than expecting strong, targeted water pressure. A higher jet count can be useful to compare, but it does not tell the whole story about comfort or bubble intensity.
Consider Heating and Insulation
All else being equal, a larger volume of water takes longer to heat than a smaller one. Cold starting water and cold weather can add to the wait, as the CO-Z and RELXTIME product information notes. Insulated covers, insulated walls, and a ground mat can help limit heat loss. Keep the cover on when the tub is not in use and follow the manufacturer’s heating directions.
Check the Structure and Materials
Inflatable spas need to hold their shape while filled with water and occupied. Look for details about the shell material, reinforcement, and puncture resistance. The products here describe laminated PVC or reinforced composite construction, but no inflatable tub should be treated as puncture-proof. Choose a clean, suitable location and follow the care instructions.
Review the Controls, Filters, and Included Items
Check what the pump controls, whether the filter system is removable, and how many replacement cartridges are included. Also look for practical extras such as a cover, ground mat, chemical dispenser, repair patch, or safety lock. These items affect setup and ongoing care, and they vary across the models in this guide.
Plan for Water Care and Safe Use
Hot tub water needs regular cleaning and sanitizing according to the manufacturer’s instructions. A filter helps remove debris, but it does not replace proper water treatment. Follow the product manual for electrical safety, temperature limits, child supervision, and maintenance. Never exceed the stated maximum temperature; the CO-Z listing specifically warns against water above 104°F.
Frequently Asked Questions
Are inflatable hot tubs the same as whirlpool tubs?
Not exactly. The models in this guide use air jets to make bubbles and create a massage effect. They do not list the directed water jets commonly found in permanent whirlpool spas.
How long does an inflatable hot tub take to heat?
Heating time varies with the starting water temperature, tub capacity, and outdoor conditions. Larger tubs generally hold more water and can take longer to warm. The CO-Z and RELXTIME product details both note that cold-weather heating can take longer.
Can I leave an inflatable hot tub outside in cold weather?
Check the specific model’s instructions before using or storing it in cold conditions. The Bestway SaluSpa includes Freeze Shield, which is designed to help protect the pump and liner. That feature does not mean every inflatable spa is suitable for freezing weather or can be left running without following its manual.
Do these hot tubs include everything needed for water care?
They include different combinations of filters and accessories, but the supplied product details do not show a complete water-treatment kit for every model. Check the package contents and the manufacturer’s water-care instructions, and plan to maintain the water regularly.
Which model is best for two people?
The RELXTIME is specifically designed for two people and has an oval shape. The Bestway SaluSpa is also sized for smaller groups, with a stated capacity of two to four adults.
Which hot tub is best for a larger group?
The CO-Z is designed for up to six adults and has a stated 336-gallon capacity. The 73-inch SunSwell is another group option, with a listed capacity of four to six people.
Conclusion
For a larger group, the CO-Z stands out for its six-person layout, stated capacity, and reinforced structure. The 73-inch SunSwell is a useful alternative if you want more jets and two covers, while the Bestway SaluSpa offers notable insulation and temperature-management features for a smaller group. If space is tight, consider the two-person RELXTIME. Before deciding, confirm the dimensions, included accessories, and setup requirements against your space and routine.
