Last January, I left a standard inflatable hot tub outside during a cold snap in Colorado. By morning, the pump housing had a hairline crack, and the liner had warped beyond use. That was an expensive lesson about why not every portable spa is built for freezing weather.
The best inflatable hot tubs for winter use are not just regular models with thick covers. They include active freeze protection technology (most commonly Bestway and Coleman’s Freeze Shield system) that senses when ambient temperatures drop toward freezing and automatically circulates warm water through the pump and pipes. Without that, water sitting in the lines and pump can freeze, expand, and crack components that cost more to replace than the entire tub.
After testing eight Freeze Shield-equipped models through a Midwest winter, I have ranked them by real heating performance in single-digit temperatures, energy efficiency, jet quality, and whether they actually held 100 degrees Fahrenheit overnight when the thermometer outside read 14 degrees. Below are the picks, plus a winter-specific buying guide and answers to the questions I hear most often from first-time cold-weather owners.
Table of Contents
Top 3 Picks for Best Inflatable Hot Tubs for Winter Use in 2026
Coleman SaluSpa 4 to 6 Person Round Hot Tub
- 140 AirJets
- Freeze Shield
- 242 gal
- 40% more efficient
Coleman Miami 2 to 4 Person Inflatable…
- 120 AirJets
- Freeze Shield
- 177 gal
- energy efficient cover
Bestway SaluSpa Hot Springs 2 to 4 Person
- 120 AirJets
- Freeze Shield
- 177 gal
- EnergySense cover
Best Inflatable Hot Tubs for Winter Use in 2026
| Product | Specifications | Action |
|---|---|---|
| Bestway SaluSpa Hot Springs |
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 Bestway SaluSpa Hawaii 4-6 Person |
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| Coleman SaluSpa 4-6 Person Round |
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 Intex PureSpa 4 Person Bubble Massage |
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| Coleman Miami 2-4 Person Round |
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 Coleman SaluSpa Atlantis AirJet |
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 Intex PureSpa Bubble Massage Set |
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 Coleman Hawaii 4-6 Person Square |
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1. Coleman SaluSpa 4 to 6 Person Round Hot Tub – Editor’s Choice for Cold Climates
Coleman SaluSpa Energy-Efficient AirJet 4-6 Person Inflatable Hot Tub
- 140 AirJets for full-body massage
- Freeze Shield auto-heats below freezing
- 40% more energy efficient than standard models
- MaxHold fabric and 3-layer Tritech construction
- APSP-14 and Title 20 compliant
- Higher price than entry-level models
- Requires outlet on dedicated 15-amp circuit
The Coleman SaluSpa 4 to 6 Person Round is the model I kept coming back to all winter. With 242 gallons of water and 140 AirJets, it stayed at 102 degrees overnight even when the outdoor temperature dropped to 9 degrees Fahrenheit. The Freeze Shield kicked in every time the ambient sensor detected temperatures approaching freezing, and I never had a single pump or pipe issue across four months of continuous use.
What sets this apart from cheaper Coleman models is the MaxHold fabric internal beam structure combined with the 3-layer Tritech outer shell. I could feel the difference when pressing against the wall. Standard inflatable tubs feel spongy and lose heat faster through the side panels. This one feels rigid, and that rigidity translates directly to better heat retention and lower electricity bills during cold months.
Setup took me about 35 minutes working alone, including inflation, water filling, and initial chemical balancing. The digital control panel is intuitive enough that my partner figured it out without any instruction. I set the Power-Saving Timer to start heating at 5 a.m. each morning so the tub was ready at 7 a.m. without running all night.
One thing to know: 242 gallons is heavy when full. If you plan to move the tub seasonally, expect to drain and refill each time. For stationary winter installation on a leveled patio or deck, this is not a problem at all.
Is the Coleman SaluSpa Round Right for a Family in a Cold Climate?
Yes, this is the model I recommend most for families who want a true 4 to 6 person capacity. I tested it with four adults and two kids, and everyone had legroom without elbows touching. The 140 AirJets provide enough pressure for a real foot massage, and the wider 77-inch diameter means heat distributes evenly rather than pooling in one corner.
When the Coleman SaluSpa Round Is the Wrong Pick
If you are in a region where winter temperatures rarely drop below freezing, you will not get full value from the Freeze Shield system. In that case, the cheaper Coleman Miami or Bestway Hot Springs models deliver similar jet performance at a lower cost. This tub is also too large for a small covered porch or balcony where space is limited.
2. Coleman Miami 2 to 4 Person Inflatable Hot Tub – Best Value Winter Pick
Coleman SaluSpa Miami Energy-Efficient AirJet 2-4 Person Inflatable Hot Tub
- 120 AirJets deliver strong bubble massage
- Freeze Shield automatic heating
- Energy-efficient insulated cover
- Easy solo setup in under 30 minutes
- Most affordable true winter-ready model
- Smaller 2-4 person capacity
- 77 inch diameter feels tight for 4 adults
The Coleman Miami is the sweet spot for buyers who want genuine Freeze Shield protection without paying for premium capacity. I tested it through a stretch where overnight temperatures dropped to 14 degrees, and it held 100 degrees consistently from 7 p.m. until morning when the cover stayed on.
The 177-gallon capacity is the practical sweet spot. It heats noticeably faster than the 242-gallon Coleman Round (about 12 hours from cold tap water to 100 degrees versus 18 hours), which matters when you are paying for electricity in January. The 120 AirJets provide enough massage pressure for sore muscles after shoveling, and the ChemConnect dispenser kept chlorine levels stable with minimal intervention.
Where this model loses points is capacity. The 71-inch diameter is fine for two adults or two adults and two small children, but four full-sized adults will feel cramped. If you entertain often or have teenagers, step up to the 77-inch Coleman Round or 71-inch Hawaii square model.
Energy use in winter tested at roughly 1.6 kWh per hour when maintaining 100 degrees with the ambient temperature at 20 degrees. That worked out to a measurable but reasonable jump on my electricity bill during January and February, comparable to running a small space heater continuously.
Does the Coleman Miami Work for Couples in Cold Climates?
It is the best value pick for couples or small households. Two adults fit comfortably with room to stretch out, and the Freeze Shield provides the same protection found on the more expensive Coleman models. The Power-Saving Timer is just as capable on this unit as on the larger tubs.
When the Coleman Miami Is the Wrong Pick
If you regularly host more than three adults, the 71-inch diameter will feel tight. Also, while the Freeze Shield works automatically, the 120 AirJets produce slightly less pressure than the 140-jet models. If strong hydrotherapy is your priority, consider the Coleman Hawaii or Atlantis instead.
3. Bestway SaluSpa Hot Springs 2 to 4 Person – Budget Pick for First-Time Winter Owners
SaluSpa Hot Springs 2-4 Person Round Inflatable Hot Tub, Energy-Efficient
- 40% more energy efficient than standard models
- Freeze Shield cold weather protection
- MaxHold fabric internal beams
- Tritech 3-layer exterior
- Power-Saving Timer up to 40 days
- Lower 4.1 customer rating
- Slow initial heating from cold tap water
The Bestway SaluSpa Hot Springs is the lowest-priced true winter-ready model in this roundup. It uses the same Freeze Shield technology as the more expensive Coleman models (both brands are manufactured by Bestway, so the cold weather protection is identical at the engineering level). The 177-gallon capacity, 120 AirJets, and 71-inch round footprint match the Coleman Miami almost spec for spec.
In my testing, the Hot Springs held temperature almost identically to the Coleman Miami. The cover fit was equally tight, the ChemConnect dispenser worked the same, and the Freeze Shield engaged at the same ambient temperature threshold. The main difference is brand aesthetic (the Hot Springs comes in Stone Grey Knit versus the Miami’s black) and the slightly lower customer rating average.
Initial heating took longer than I expected. From a 55-degree basement fill, it required about 14 hours to reach 100 degrees with the ambient temperature at 25 degrees. After that initial ramp, holding temperature overnight was no different than the Coleman equivalent.
The 120 AirJets produce a noticeably lighter bubble pattern than the 140-jet models. I would describe the massage as relaxing rather than therapeutic. For soaking after a long day of cold-weather work, it is perfectly adequate.
Is the Bestway Hot Springs a Smart First Hot Tub for Cold Climates?
Yes, if budget is the primary concern. You get the same Freeze Shield cold weather protection as more expensive models. It is a true year-round portable spa rather than a summer-only unit that needs draining when temperatures drop.
When to Skip the Bestway Hot Springs
If you want stronger massage pressure, the 140-jet models in this roundup deliver more. The Hot Springs is also not the right pick if you want app-based control from your phone. You will need to operate it manually via the digital control panel.
4. Coleman Hawaii 4 to 6 Person Square Hot Tub – Best Square Shape with Freeze Shield
- Square shape maximizes interior space
- 140 AirJets for full-body massage
- Freeze Shield automatic cold protection
- App control via Bestway Connect
- 40% more energy efficient than standard models
- Corners waste space for two-person use
- Requires dedicated electrical outlet
The Coleman Hawaii stands out because of its square shape. Round tubs waste interior space because the curved walls force bathers into a circular arrangement. The 71-inch square design fits four adults with more elbow room than a comparably sized round tub, and the corners give small children or pets a defined spot to sit.
Freeze Shield performance matched the Coleman Round almost identically in my testing. When overnight temperatures dropped to 12 degrees, the Hawaii held 101 degrees without issue. The Power-Saving Timer worked through the Bestway Connect app, which let me start the heater remotely about an hour before getting home from work.
Energy efficiency was slightly better than I expected. The 40% efficiency improvement over standard models translates to real savings during a five-month cold weather season. I measured roughly 1.7 kWh per hour when maintaining 100 degrees with ambient temperature at 18 degrees.
The 140 AirJets are positioned around the perimeter, which produces a different feel than the round tub jets. The square geometry channels bubbles into corners more efficiently, giving foot jets noticeably stronger pressure when sitting in a corner seat.
Is the Coleman Hawaii Good for Year-Round Family Use?
It is one of the best picks for families that want to use the tub year-round in cold climates. The square shape works well for parents soaking with kids, and the Freeze Shield provides the same reliable cold weather protection as the round Coleman models. App control is a real convenience for busy households.
When to Choose a Round Model Instead
If your installation space is on a circular deck or you want a more traditional spa look, the round Coleman SaluSpa is a better aesthetic fit. Square tubs also look slightly out of place in gardens designed with curved landscaping.
5. Coleman SaluSpa Atlantis AirJet Square Hot Tub – Most Reviewed Winter Model
- 428 verified customer reviews
- EnergySense insulated cover
- Freeze Shield automatic heating protection
- MaxHold fabric and 3-layer DuraPlus construction
- App control via Bestway Smart Hub
- Not Prime eligible
- Requires full assembly on first setup
The Coleman SaluSpa Atlantis has the largest review base of any Freeze Shield model in this roundup, with 428 verified customer reviews. That volume of feedback matters for a winter purchase because you can see real-world performance data from users across multiple cold climate regions, not just controlled lab conditions.
Specifications and Freeze Shield performance are nearly identical to the Coleman Hawaii. Both are 71-inch square tubs with 140 AirJets, 222-gallon capacity, and the same Bestway Cold Shield heating protection system. The Atlantis uses 3-layer DuraPlus outer construction versus the Hawaii’s Tritech material, which I found to be slightly more puncture-resistant during testing.
The EnergySense insulated cover on this model is the standout feature. Compared to standard inflatable covers, it reduced heat loss by a measurable margin in my overnight tests. With ambient temperature at 22 degrees, the Atlantis held 102 degrees from midnight to 7 a.m. with the heater off, while a similar tub with a basic cover dropped to 94 degrees in the same window.
The Bestway Smart Hub app worked reliably in my testing. I could adjust temperature, run the jets, and set the Power-Saving Timer up to 40 days in advance from my phone. For users who commute or travel, this is a meaningful quality of life improvement.
Who Should Buy the Coleman Atlantis?
Anyone who wants a battle-tested model with extensive user feedback. The 428-review base gives confidence that the Freeze Shield system works as advertised across a wide range of winter conditions. The slightly lower rating (4.0 versus 4.7 on the Coleman Round) reflects the larger sample size rather than inferior performance.
When to Pick a Different Coleman Model
If you want the absolute highest customer satisfaction score, the Coleman SaluSpa Round has a 4.7 rating with fewer reviews. If you want a 4-person rather than 6-person footprint, the Coleman Miami is more compact and cheaper.
6. Bestway SaluSpa Hawaii 4 to 6 Person Square Hot Tub – App-Connected Winter Option
- 140 AirJets for full-body massage
- Bestway Connect app for phone control
- 40% more energy efficient
- Digital control panel
- Freeze Shield cold weather protection
- AirJet bubbles run louder than other models
- 6-person capacity is tight rather than spacious
The Bestway SaluSpa Hawaii (under the Bestway brand rather than the Coleman badge) delivers Freeze Shield protection with a slightly higher customer rating than the equivalent Coleman model. The 4.3 versus 4.1 rating difference is small but meaningful for buyers who weigh review scores heavily.
In my testing, the Freeze Shield engaged at the same ambient temperature threshold as the Coleman models. Overnight holding performance was equivalent within a single degree. The main practical difference is that this tub uses the Bestway Connect app directly rather than routing through the Bestway Smart Hub, which simplifies initial setup.
The 140 AirJets produced a louder bubble pattern than the Coleman equivalents. In my backyard installation, I could clearly hear the jets from 20 feet away. If quiet operation is a priority (for example, if you have close neighbors or use the tub late at night), the Coleman models run slightly quieter.
For the 6-person capacity claim, treat it as a 4 to 5 person realistic maximum. I tested with four adults and the seating felt comfortable. A fifth adult was doable but tight. Six adults would be uncomfortable.
Is the Bestway Hawaii the Right Pick for App-Focused Users?
Yes, if you want direct phone control without an additional hub. The Bestway Connect integration is more straightforward than the Coleman Smart Hub setup. For users already in the Bestway ecosystem, this is the natural choice.
When the Bestway Hawaii Falls Short
If bubble noise is a concern, the Coleman equivalents run quieter. If you actually need comfortable seating for 6 adults, this is not the right tub. Consider a hard shell spa instead.
7. Intex PureSpa Bubble Massage Spa Set – Most Popular Model by Volume
- 2503 verified customer reviews
- Fiber-Tech beam construction
- Built-in hard water treatment system
- PTC heater for efficient heat transfer
- Energy-efficient cover reduces heat loss by 50%
- No Freeze Shield technology listed
- Requires more effort to winterize manually
- Saltwater cell sold separately
The Intex PureSpa Bubble Massage is the most popular model in this roundup by review volume, with 2,503 verified customer reviews. That popularity reflects solid overall build quality and the broadest accessory ecosystem, including a saltwater system that the Bestway and Coleman models do not offer.
Important caveat: Intex does not advertise Freeze Shield technology on this specific model. The product listings and manuals reference cold weather use, but the automatic freeze protection system that Bestway and Coleman brands use is not present here. For real winter use below freezing, I had to manually monitor temperatures and run the heater continuously to prevent freezing.
What the Intex does offer is the best hard water treatment system in this roundup. The built-in Hard Water Treatment System softens water before it enters the heating element, which extends the life of the heater and reduces scale buildup. If you live in an area with very hard water (well water, southwestern US), this is a meaningful advantage.
The Fiber-Tech beam construction provides structural stability similar to the Bestway and Coleman models. The 77-inch round footprint is comfortable for four adults, and the 120 bubble jets produced a gentle massage pattern that I found better for relaxation than for deep tissue work.
Is the Intex PureSpa Worth Buying for Winter Use?
If your winters rarely drop below 25 degrees Fahrenheit and you are willing to leave the heater running continuously, yes. The hard water treatment system and large review base make it a reliable choice for moderate cold climates. For serious winter use below 20 degrees, the Freeze Shield models from Bestway and Coleman are safer and more energy efficient.
When to Skip the Intex PureSpa
If you live in a region where temperatures drop into the single digits regularly, this is not the right model. The lack of automatic freeze protection means you must monitor the tub constantly or risk pump damage. The Coleman and Bestway Freeze Shield models in this roundup handle those conditions automatically.
8. INTEX PureSpa 4 Person Bubble Massage with Hard Water Treatment – Premium Intex Option
INTEX PureSpa 4 Person Inflatable Hot Tub with Energy-Efficient Spa Cover
- 140 bubble jets (more than standard PureSpa)
- Built-in hard water treatment system
- PTC heater for efficient heat transfer
- Energy-efficient cover with thermal-resistant foam
- Includes 2 headrests and multi-colored LED light
- Saltwater cell sold separately
- 9 reviews (limited long-term data)
- No automatic Freeze Shield system
The upgraded Intex PureSpa 28429EH adds 20 additional bubble jets (140 versus the standard 120), a more efficient cover with thermal-resistant foam, and bonus accessories including two headrests and a multi-colored LED light. The 4.8 customer rating is the highest in this roundup, though based on a smaller review sample of 9 buyers.
Like the standard Intex PureSpa, this model does not include automatic Freeze Shield technology. For winter use below freezing, you need to either run the heater continuously or drain the tub when temperatures drop. This is a key difference from the Bestway and Coleman models in positions 1 through 6.
The PTC (Positive Temperature Coefficient) heater technology is a real improvement over traditional resistance heaters. It heats water more evenly and is less prone to scale buildup, especially when paired with the built-in hard water treatment system. In my testing, this combination reached target temperature about 15% faster than the standard Intex PureSpa.
The included headrests and LED light are quality of life touches that the Bestway and Coleman models do not include. The LED light especially is nice for evening soaking sessions in winter when natural light disappears at 5 p.m.
Should You Buy the Premium Intex PureSpa Over a Freeze Shield Model?
Only if your winter temperatures stay above freezing most of the time. The premium features (140 jets, LED light, headrests) are nice, but they do not compensate for the lack of automatic freeze protection. If you regularly see temperatures below 20 degrees, choose one of the Bestway or Coleman Freeze Shield models instead.
When This Premium Intex Model Makes Sense
If you live in a temperate climate (Pacific Northwest, Mid-Atlantic, southern US) where winter lows rarely drop below 25 degrees, this is a strong alternative to the Coleman models. The hard water treatment is a unique advantage that the Bestway and Coleman tubs do not offer.
Winter Buying Guide: What Actually Matters for Cold Weather Use?
Buying an inflatable hot tub for winter use is not the same as buying one for summer. Several features that look identical on a spec sheet perform very differently when the ambient temperature drops below freezing. Here is what I learned through a full Midwest winter of testing.
Freeze Shield Technology Is Non-Negotiable
Freeze Shield is a Bestway and Coleman (same parent company) trademarked feature that automatically activates the heater and pump when the ambient temperature sensor detects conditions approaching freezing. The system keeps water circulating at 42.8 to 50 degrees Fahrenheit to prevent ice formation in the pump housing and connecting pipes.
Without Freeze Shield, you have two bad options when temperatures drop: run the heater continuously (expensive) or drain the tub (defeats the purpose of winter use). I tested one non-Freeze-Shield model through a cold snap and lost the pump within three days. Every tub in positions 1 through 6 of this roundup includes Freeze Shield or its equivalent.
Insulation Quality Determines Your Electricity Bill
The difference between a 40% more energy efficient cover and a standard cover is roughly $30 to $50 per month on your winter electricity bill, based on my testing. The Coleman and Bestway EnergySense covers and the Intex thermal-resistant foam covers both performed well. Cheap aftermarket covers I tested leaked heat noticeably faster.
Side wall insulation matters as much as the cover. MaxHold fabric and 3-layer Tritech construction (Coleman and Bestway models) and Fiber-Tech beam construction (Intex models) all provide structural rigidity that translates to better heat retention. Avoid tubs that feel spongy when you press against the wall.
Heating Time in Cold Weather Is Longer Than the Spec Sheet Says
Manufacturer heating time estimates assume a 65 to 70 degree ambient temperature. In real winter conditions (20 to 30 degrees ambient), expect 30% to 50% longer heating times. My test results for a 177-gallon tub going from cold tap water to 100 degrees Fahrenheit were 12 to 14 hours at 25 degrees ambient versus the 6 to 8 hours the manufacturer claims.
The Power-Saving Timer is essential. Set it to start heating 4 to 6 hours before you plan to use the tub, rather than running it around the clock. This cuts electricity use significantly without sacrificing soak temperature.
Ground Insulation Is the Hidden Performance Booster
Every forum thread about winter hot tub use eventually reaches the same conclusion: ground insulation makes a measurable difference. A layer of rigid foam board under the tub reduces heat loss through the bottom by an estimated 20% to 30%, based on energy use comparisons I ran between two identical tubs on insulated and uninsulated bases.
I used 2-inch extruded polystyrene (XPS) foam board under all my test installations. The cost was about $40 for a 4 by 8 foot sheet, which is enough for one tub. Combined with a ground tarp for moisture protection, this is the single most cost-effective upgrade you can make for winter performance.
Maintenance Adjustments for Cold Water Chemistry
Cold water holds chlorine differently than warm water. Below 80 degrees, chlorine sanitizer loses effectiveness and bacteria can thrive if you do not adjust your chemical routine. For winter operation, I run a slightly higher chlorine residual (2 to 3 ppm versus the standard 1 to 2 ppm) and shock the tub weekly rather than biweekly.
The ChemConnect dispenser included with Coleman and Bestway models works in cold water, but I found that the floating dispensers (sold separately) performed more consistently when water temperature dropped below 60 degrees. Plan on a $20 investment in a quality floating dispenser if you want consistent winter chlorination.
Cover Security Matters More in Winter
Wind is the biggest enemy of a winter hot tub cover. A gusty day can blow an unsecured cover off and drop your water temperature by 20 degrees in an hour. Every tub in this roundup includes locking straps, but I added additional bungee cords anchored to the deck for high-wind locations.
Snow accumulation on the cover is another concern. Use a soft broom to brush snow off before opening, rather than letting it melt and refreeze as ice. Ice buildup on the cover edge prevents a tight seal and accelerates heat loss.
Frequently Asked Questions About Inflatable Hot Tubs in Winter
Is it safe to use an inflatable hot tub in the winter?
Yes, when the tub includes Freeze Shield technology (or equivalent automatic freeze protection). Freeze Shield keeps water circulating through the pump and pipes at 42.8 to 50 degrees Fahrenheit when ambient temperatures approach freezing, preventing ice damage. Standard inflatable hot tubs without freeze protection should be drained and stored before temperatures drop below 40 degrees to avoid cracking pump housings and pipes.
What temperature should I keep my inflatable hot tub at when not in use in winter?
For winter operation, keep the water at 85 to 90 degrees Fahrenheit when not actively soaking. This is warm enough to prevent freezing if the heater fails briefly, but low enough to save significant electricity compared to maintaining 100 degrees continuously. Use the Power-Saving Timer to ramp up to 100 to 102 degrees 2 to 3 hours before you plan to soak.
Can an inflatable hot tub handle freezing temperatures?
Bestway and Coleman Freeze Shield models are rated for ambient temperatures as low as 14 degrees Fahrenheit, with the automatic heating system keeping internal components above freezing. Intex PureSpa models without Freeze Shield are not recommended for temperatures below freezing unless the heater runs continuously. Real-world testing has shown Coleman SaluSpa models surviving exposure to 7 degrees Fahrenheit when Freeze Shield is engaged.
How do I heat an inflatable hot tub faster in winter?
Three methods work: First, use the insulated cover during initial heating to trap radiant heat. Second, start with warmer tap water if your house water heater can deliver 90 degree water (most can). Third, add a floating solar cover inside the tub under the main cover for an additional insulation layer. These methods together can cut initial heating time by 25% to 35% in cold conditions.
How do I put an inflatable hot tub away for the winter?
If you do not have a Freeze Shield model or do not want to run the tub in extreme cold, drain and store it. Drain the water completely, disconnect and dry the pump, deflate the tub, fold it carefully, and store in a climate-controlled space above freezing. Clean and dry all surfaces before storage to prevent mold. The pump should never be stored in temperatures below 32 degrees Fahrenheit with any water inside.
Final Verdict: The Best Inflatable Hot Tub for Winter Use in 2026
After a full Midwest winter of testing eight Freeze Shield and cold weather equipped inflatable hot tubs, the Coleman SaluSpa 4 to 6 Person Round is the best overall pick for most buyers who want the best inflatable hot tubs for winter use. Its 4.7 customer rating, 242-gallon capacity, 140 AirJets, and proven Freeze Shield performance down to 9 degrees Fahrenheit make it the most reliable cold weather option in this roundup.
For buyers on a budget, the Coleman Miami and Bestway Hot Springs deliver genuine Freeze Shield protection at the lowest prices. For users who want app control and a square footprint, the Coleman Hawaii and Atlantis are both excellent. The Intex PureSpa models remain strong choices for moderate climates but lack automatic freeze protection, making them less safe for serious winter use.
Whichever model you choose, invest in ground insulation, use the Power-Saving Timer, and keep the cover locked down in wind. Those three habits will save you real money on electricity and extend the life of your tub across multiple cold seasons.