A blow-up hot tub can add warm-water relaxation to a backyard without the cost or permanence of a built-in spa. The best choice depends on how many people will use it, how much space you have, and whether features such as app control or cold-weather protection matter to you. These five options range from a compact Coleman model to larger tubs marketed for groups. Compare their size, insulation, controls, and practical trade-offs before choosing.
Table of Contents
Quick Comparison
| Product | Claimed capacity | Jets | Standout feature | Best suited for |
|---|---|---|---|---|
| Coleman SaluSpa Miami | 2–4 people | 120 | Energy-efficient insulation and Freeze Shield | Smaller spaces and couples |
| SaluSpa Hot Springs Square | 4–6 people | 140 | App control and insulated construction | Shoppers wanting more room and remote controls |
| SunSwell 71-Inch Round Hot Tub | 4–6 people | 120 | Four replacement filters included | Buyers seeking a straightforward round spa |
| RELXTIME 6-Person Inflatable Hot Tub | Up to 6 people | 130 | Multicolor underwater lights | Those who want lighting and freeze protection |
| RELXTIME 4–6 Person Square Hot Tub | 4–6 people | 130 | Automatic filter reminder | Groups looking for a square layout |
Our Picks: Best Blow Up Hot Tub On The Market reviews
1. Coleman SaluSpa Miami: A Compact, Insulated Pick for Smaller Groups
The Coleman SaluSpa Miami is a round inflatable spa sized for two to four people. Its 120 AirJet bubble outlets provide a bubbling massage, while the digital control panel lets you set the water temperature up to 104°F. The tub measures 71 by 71 inches and holds 177 gallons.
Its insulated walls and cover are described as up to 40% more energy-efficient than those of similar hot tubs. MaxHold internal beams help the tub retain air pressure, and the three-layer Tritech exterior is designed to resist punctures and damage. Freeze Shield can help protect the pump and liner in cold weather, and a power-saving timer lets you schedule temperature settings in advance.
This is a sensible choice if you want a familiar brand and features aimed at keeping heat in. In practice, the advertised four-person capacity is best treated as a maximum: a smaller group will have more room to sit comfortably. As with other inflatable tubs, water heating takes time, and insulation cannot remove the cost of maintaining hot water.
Pros:
- Insulated walls and cover are designed to reduce heat loss.
- Freeze Shield and a programmable power-saving timer add useful controls.
- Includes 120 bubble jets and a ChemConnect chlorine dispenser.
- Compact footprint compared with the larger group-oriented options.
Cons:
- Its 177-gallon capacity and 2–4-person rating may feel tight with four adults.
- Heating water still takes time, especially when the surrounding air is cold.
Verdict: Choose the Coleman Miami if you want a compact, insulated tub for one or two people, with occasional extra seating.
2. SaluSpa Hot Springs Square: App Controls and Room for a Group
The square SaluSpa Hot Springs is marketed for four to six people and measures 71 by 71 inches. It has 140 AirJet massage outlets and a multi-function pump that inflates the tub, heats the water up to 104°F, and runs the filtration system. The Bestway Connect app can control the temperature, timer, filter, and massage system.
EnergySense insulated walls and a cover are advertised as up to 40% more energy-efficient than similar tubs. MaxHold beams support air pressure and stability, while the three-layer Tritech exterior is designed for durability. The package includes a cover, filter cartridge, ChemConnect dispenser, and repair patch. Freeze Shield is intended to protect the pump and liner from cold-weather damage.
The app is a useful extra if you want to adjust settings without walking out to the tub. Although the model is listed for up to six people, some owners find it more comfortable for two, with four possible but less spacious. The product details also give different water-capacity figures, so check the current listing if capacity is a deciding factor.
Pros:
- App compatibility adds remote control of several spa functions.
- Offers 140 jets and a square layout marketed for larger groups.
- Insulated construction and Freeze Shield are useful in cooler conditions.
- Includes a cover, filter cartridge, dispenser, and repair patch.
Cons:
- Six adults may find the space less comfortable than the capacity claim suggests.
- The supplied product details list conflicting water-capacity figures.
Verdict: Pick the Hot Springs if app control and a larger seating area are priorities, but plan on a more comfortable fit for a smaller group.
3. SunSwell 71-Inch Round Hot Tub: A Simple Setup with Extra Filters
This 71-inch round SunSwell spa is a basic bubble-jet option with 120 jets, a removable filtration system, and a control system that heats water up to 104°F. The manufacturer describes the laminated PVC construction as lightweight and more puncture-resistant than ordinary PVC. The set also includes four replacement filter cartridges.
Setup is designed to be straightforward: connect the tub to power and use the controls to inflate it. The listing says it can seat four to six people, but that range is best viewed as a maximum rather than a promise of roomy seating. A 71-inch round tub may be more practical for a smaller household or a couple of friends, especially if you want space to relax rather than simply fit everyone in.
Unlike the Coleman and SaluSpa choices, the supplied details do not highlight app control, an energy-efficiency comparison, or freeze protection. The included spare filters are a practical bonus, but you will still need to clean and maintain the water and follow the manufacturer’s guidance for filter replacement and care.
Pros:
- Includes 120 bubble jets and a removable filtration system.
- Four replacement filters are included.
- Laminated PVC is designed to resist punctures and hold its shape.
- Simple inflation and digital controls keep the setup approach straightforward.
Cons:
- The listing provides fewer details about insulation and cold-weather protection.
- The stated four-to-six-person capacity may be snug for a larger group.
Verdict: Consider the SunSwell if you want a simple round spa and value having replacement filters included, but look elsewhere for app controls or clearly stated insulation features.
4. RELXTIME 6-Person Spa: Colorful Lighting and Freeze Protection
This RELXTIME spa is marketed for up to six people and has 130 bubble jets, an adjustable heater that reaches 104°F, and submersible lights with five color options. Its dimensions are listed as 73 by 57 by 25.6 inches, with a 240-gallon capacity. The narrower listed width is worth checking against your available space and your preferred seating arrangement.
The tub uses laminated PVC with vertical I-beam construction to help its walls stay rigid and resist scratches and punctures. It also has automatic freeze protection for the internal components. For additional insulation, the manufacturer recommends placing a sponge mat underneath, which is not included.
Some owners appreciate the sturdy feel and the lighting, while reported experiences with heating reliability vary. One practical limitation is that running the bubbles can affect water temperature; the supplied owner experience notes a temperature drop when the jets are on. If steady heat is your main concern, compare this model with tubs that emphasize insulated construction.
Pros:
- Offers 130 bubble jets and five lighting colors.
- Includes automatic freeze protection.
- Reinforced laminated PVC construction is designed to resist damage.
- Listed 240-gallon capacity provides a substantial water volume.
Cons:
- A ground insulation mat is recommended but not included.
- Some owners report heating problems, and using the bubbles may lower water temperature.
Verdict: Choose this RELXTIME model if lighting and freeze protection appeal to you, but weigh the mixed heating experiences against your need for dependable temperature control.
5. RELXTIME Square Hot Tub: A 130-Jet Option with a Filter Alert
This RELXTIME inflatable spa has 130 air jets and is marketed for four to six people. It measures 73 by 73 inches and holds 240 gallons. A digital control panel lets you set the water temperature and bubble massage, while the built-in removable filtration system helps maintain water quality.
The filter system displays an “FC” code when the filter needs attention, giving you a reminder to check its condition. The tub is made from laminated PVC, which the manufacturer describes as lightweight, durable, and puncture-resistant. The product details do not mention app control, freeze protection, or an included insulating mat, so those features should not be assumed.
The square shape may suit a patio layout where a round tub would be awkward, though its 73-inch sides still require a generous level footprint. The manufacturer notes that heating can take longer in cold weather and recommends a thick ground mat for better insulation; that mat is not included. The listed capacity is for up to six, but expect less room per person when it is full.
Pros:
- Provides 130 air jets and a square 73-by-73-inch layout.
- Filter alert helps remind you to check water filtration.
- Removable filtration system supports routine water care.
- Listed 240-gallon capacity and six-person maximum offer group-use potential.
Cons:
- A ground mat is recommended for insulation but is not included.
- Heating may take longer in cold weather, and the listing does not highlight freeze protection.
Verdict: This model is worth considering if you want a square tub with a filter alert, but factor in the footprint and the need to plan for insulation beneath it.
How to Choose the Best Blow-Up Hot Tub
Choose a realistic seating capacity
Capacity claims describe the maximum number of people a tub can hold, not necessarily how many can stretch out comfortably. A 2–4-person model may work well for a couple, while a tub marketed for six can still feel crowded when filled to capacity. Think about your usual group size and whether you value extra legroom more than a higher seating number.
Measure the setup area and the access route
Check the tub’s listed width and length, then leave room around it for the pump, controls, and safe entry. Confirm that you can move the packed tub through gates or doorways if needed. The filled tub is very heavy, so choose a level surface that can safely support the total load and follow the manufacturer’s placement instructions.
Compare insulation and cold-weather features
Insulated walls and a cover can help limit heat loss, while a mat beneath the spa may provide an additional barrier from a cold surface. Some models in this list include freeze-protection features, but these are not a substitute for following the manual’s cold-weather instructions. If you plan to use the spa in chilly conditions, check exactly what protection the model provides and whether any recommended insulation is included.
Think about heating time and energy use
Inflatable tubs need time to heat their water, and cold air can make the process slower. Larger water capacity can also take longer to warm than a smaller volume. A timer or app can help you plan when the tub is ready, but it does not eliminate the energy needed to heat and maintain the water. Compare insulation claims and control options rather than assuming every model heats at the same rate.
Understand the massage system
These models use air jets that create bubbles, rather than the focused water jets found in some hard-sided spas. A higher jet count alone does not tell you how strong or comfortable the massage will feel. Consider whether you want a gentle bubbling effect, and check whether the heater can operate alongside the massage system as described by the manufacturer.
Plan for water care and replacement parts
Filters, chemical dispensers, and reminders can make routine care easier, but they do not remove the need to monitor and maintain the water. Check what comes in the box, how the filter is maintained, and whether replacement cartridges are easy to source. Follow the manufacturer’s directions for water treatment and cleaning.
Check the electrical and operating requirements
Review the manufacturer’s instructions for power, setup, operation, and safe use before buying. Make sure the intended location and outlet meet those requirements, and do not use the spa if the electrical setup is uncertain. Also check the manual for water-temperature limits, child-safety guidance, and any restrictions on indoor or outdoor use.
Frequently Asked Questions
How long does an inflatable hot tub take to heat?
Heating time depends on the starting water temperature, the amount of water, the weather, and the model. The tubs here heat to a maximum of 104°F, but the supplied product details do not provide a dependable heating time for every model. Expect longer waits in cold conditions.
Can I leave an inflatable hot tub outside all year?
Some models include freeze protection, but that does not mean every tub can be left outside in all weather. Follow the manufacturer’s instructions for cold temperatures, storage, and winter use. If a model lacks a stated freeze-protection feature, do not assume it has one.
Are inflatable hot tubs comfortable for the full listed capacity?
Not always. The maximum capacity is a guide, and comfort depends on the tub’s dimensions and how much room each person wants. For more space to relax, plan for fewer people than the maximum listed capacity.
Do these tubs have traditional water jets?
The products in this list are described as having AirJet or air-bubble systems. They create bubbling massage effects, which differ from focused water jets on some permanent spas.
Does a filter system mean the water is maintenance-free?
No. A filter helps remove debris, but you still need to follow the manufacturer’s instructions for cleaning, water treatment, and filter care. Some models provide a dispenser or filter reminder, but these do not replace regular maintenance.
Can I put an inflatable hot tub on a deck?
Only if the deck is designed to support the filled tub, the occupants, and the equipment. A filled spa is much heavier than an empty one. Check the load capacity with a qualified professional if you are unsure, and follow the product’s placement instructions.
Final Recommendation
The Coleman SaluSpa Miami is the strongest all-around fit here for shoppers who want a smaller tub with insulation and freeze-protection features. For app control and more group capacity, consider the SaluSpa Hot Springs Square, while the RELXTIME options add features such as colorful lighting or a filter alert. Before ordering, confirm that the tub fits your space, that the surface and electrical setup meet the manufacturer’s requirements, and that the seating capacity matches how you plan to use it.
