Master Spas vs Caldera hot tubs
Best known for: full foam, clamped manifold plumbing (Master Spas) and Atlas neck and Euphoria leg jets (Caldera). Master Spas lists 29 hot tubs for 3 to 8 people, Caldera 23 hot tubs for 2 to 8 people. Published prices start at $7,295 for Master Spas and $5,499 for Caldera.
Master Spas
Shown: LSX 850
A big Indiana factory that builds all of its hot tubs in the USA, puts Michael Phelps's name on its flagship, and fits a mineral cartridge to every model.
From $7,295
Get the price range
Caldera
Shown: Florence
Every seat is designed as a massage station, the top Utopia line comes with salt water and hourly water testing, and you get Watkins engineering for less than a Hot Spring.
From $5,499
Get the price rangeHow they differ
- Full foam, clamped manifold plumbing
- Built in its own Indiana plant
- Copper-zinc mineral filter standard
- Atlas neck and Euphoria leg jets
- Insulation you can pull out
- Every seat a massage station
- Yes Self-supporting shell
- Yes Clamped plumbing
- Yes Manifold-fed jets
- Yes Standard parts
- Partly Self-supporting shell
- Partly Clamped plumbing
- Not published Manifold-fed jets
- Partly Standard parts
- Strong sales and installation ratings
- Good local dealers earn praise
- Comfortable seating
- Insulation easy to service
- Slow dealer-handled warranty repairs
- Control panel and pump failures
- No-heat from circulation faults
- Salt cartridges wearing out fast
Which lines compete? Tier by tier.
Each maker sorts its own series from entry to flagship; we group them the same way so you can price like against like.
- Getaway Spas5 models · 3–5 seats · from $7,295
- LH Series5 models · 3–7 seats · from $9,695
- Fantasy Series5 models · 2–5 seats · from $5,499
- Clarity Spas7 models · 5–7 seats · from $11,999
- Vacanza Series6 models · 2–7 seats · from $9,999
- Twilight Series7 models · 3–7 seats · from $14,499
- Paradise Series6 models · 3–7 seats · from $13,999
- Michael Phelps Legend Series5 models · 5–8 seats · from $19,999
- Utopia Series6 models · 3–8 seats · from $18,499
Which suits whom?
Master Spas, if you want
- Full foam, clamped manifold plumbing
Caldera, if you want
- A lower starting price ($5,499 against $7,295)
- Atlas neck and Euphoria leg jets
- A tub that plugs into a regular outlet (8 models)
Fit decides more than any figure here. Sit in both in the seat you would use most (dry is fine), feel the jets on a running display tub with the back of your hand, and read both warranty cards before you sign.
What’s a good deal on either?
Pick a brand. We send you the price range, then connect you with one dealer near you for it.
The details
Keeping it hot: standby power and cost2
Standby is what a tub draws to hold its heat with the cover on and nobody in it. California tests it for every spa sold in the state. At the US average 18.19¢ per kWh (January to July 2026), the middle Master Spas model costs about $25 a month to keep hot and the middle Caldera about $26 a month. In watts: 191.5 W (28 filings) and 199.5 W (18). Your bill also depends on your climate, how hot you keep it and how often the cover is off.
| Seats | Master Spas | Caldera |
|---|---|---|
| 3 | 148 W | 152 W |
| 5 | 190.5 W | 195 W |
| 6 | 198 W | 198 W |
| 7 | 206.5 W | 214 W |
| 8 | 259 W | 307 W |
Complaint records2
Master Spas. Better Business Bureau grade A+, 20 complaints in three years. ConsumerAffairs 4.1 of 5 from 1,476 reviews. Latest U.S. recall: 2019.
Caldera. Better Business Bureau grade C-, 18 complaints in three years. ConsumerAffairs 1.3 of 5 from 50 reviews. No U.S. safety recall found.
Complaint counts grow with the number of tubs a company sells; how it answers them tells you more than the count.
Who owns them2
Master Spas is privately held. Caldera belongs to Masco Corporation. Each company’s history: Master Spas and Caldera.
What to ask in the showroom1
- Manifold-fed jets: Caldera doesn't publish it. Ask: “Does each jet here get its own hose from a manifold, or are they chained?”
Every figure side by side30
Model against model1
No manufacturer pays us. How we make money
Common questions
Is Master Spas better than Caldera?
Neither is better for everyone. Caldera suits you if you want a lower starting price ($5,499 against $7,295) and a tub that plugs into a regular outlet (8 models). Sit in both before you choose; dry is fine.
Which costs less, Master Spas or Caldera?
Master Spas: $7,295 to $21,999 (reported prices and list prices). Caldera: $5,499 to $29,499 (list prices, MSRP). What you pay depends on the model, options, delivery and the dealer, so ask each for a written, itemized quote.
Are Master Spas and Caldera made by the same company?
No. Master Spas is privately held; Caldera belongs to Masco Corporation.
Where are Master Spas and Caldera hot tubs made?
Master Spas builds in Fort Wayne, Indiana. Caldera builds in Vista, California and Tijuana, Mexico.
Sources
11
- California Energy Commission appliance database (spas)standby watts for Master Spas and Caldera models
- Master Spas warrantyMichael Phelps Legend Series and Twilight Series warranty terms
- Better Business Bureau: Master Spasrating and complaint count
- ConsumerAffairs: Master Spasowner rating
- CPSC recall, 2019 (Master Spas)recall notice
- Ownership record: Master SpasPrivately held
- Caldera Spas warrantyUtopia Series and Paradise Series warranty terms
- Better Business Bureau: Caldera Spasrating and complaint count
- ConsumerAffairs: Caldera Spasowner rating
- Ownership record: Caldera SpasMasco Corporation
- CPSC recallsrecall search