Caldera Niagara vs Hot Spring Grandee hot tubs compared
Short answer
The Caldera Niagara seats 7 in 89 x 89 in; the Hot Spring Grandee seats 7 with no lounger in 100 x 91 in. The Niagara has 52 jets to the Grandee's 49, as each maker counts them. The Niagara is $24,999 (maker's list price, Oct 2026); the Grandee $26,499 (maker's list price, Oct 2026).
| Measure |  Caldera NiagaraUtopia Series |  Hot Spring GrandeeHighlife |
|---|---|---|
| Lineup | ||
| Series | Utopia Series | Highlife |
| Priceas labeled under each figure | $24,999Maker's list price (MSRP), Oct 2026 | $26,499Maker's list price (MSRP), Oct 2026 |
| Size | ||
| Seats | 7 | 7 |
| Length | 89" | 100" |
| Width | 89" | 91" |
| Height | 38" | 38" |
| Water | 400 gal | 455 gal |
| Dry weight | 995 lb | 790 lb |
| Filled weightwater, no people | 5,555 lb | 5,810 lb |
| Jets and pumps | ||
| Jetsas the maker counts them | 52 | 49 |
| Jet pumps | 2 | 2 |
| Pump horsepoweras published | 2.5 HP continuous | 2.5 HP |
| Neck and shoulder jets | 2 Systems | Not published |
| Electrical | ||
| Voltage | 230V | 230V |
| Amperage | 50 | 50 |
| Heaterat 240V | 4 kW | 4 kW |
| Build and water care | ||
| Insulation | FiberCor® | Multiple layers of urethane foam |
| Cover thickness | 4” tapered | 4" tapered core |
| Shell | acrylic | acrylic |
| Cabinet | EcoTech® Plus | Not published |
| Filter area | 100 sq ft | 325 sq ft |
| Ozone | Corona Discharge Ozone | FreshWater III high-output ozone system (corona discharge… |
| Salt system | FreshWater® Salt System (part of FreshWater® IQ) | FreshWater Salt System (included; smart monitoring and dosing… |
| Built in | Vista, California, USA (Watkins Wellness / Watkins… | Not published |
| Warranty | ||
| Shell structure | 10 years | 7 years |
| Shell surface | 7 years | 7 years |
| Equipment | 5 years | 5 years |
| Plumbing | 5 years | 5 years |
| Cabinet | 5 years | 5 years |
Verdict: The Caldera Niagara suits buyers who want a smaller footprint (89 x 89 in), a longer shell warranty (10 years against 7 years) and less water to heat and treat (400 gal). The Hot Spring Grandee suits buyers who want a roomier shell (100 x 91 in).
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What is the difference between the Caldera Niagara and Hot Spring Grandee?
Both seat 7. The Niagara measures 89 x 89 x 38 in and the Grandee 100 x 91 x 38 in. The Niagara has 52 jets to the Grandee's 49, as the maker counts them. Prices: the Niagara $24,999 (maker's list price, Oct 2026), the Grandee $26,499 (maker's list price, Oct 2026).
The Caldera Niagara and Hot Spring Grandee come from different makers, the Niagara from the Utopia Series and the Grandee from the Highlife line. Every figure is the maker's own, with a dot that links the page or PDF it came from. Where the published specs differ:
- Length. Niagara: 89"; Grandee: 100"
- Width. Niagara: 89"; Grandee: 91"
- Water. Niagara: 400 gal; Grandee: 455 gal
- Dry weight. Niagara: 995 lb; Grandee: 790 lb
- Filled weight. Niagara: 5,555 lb; Grandee: 5,810 lb
- Jets. Niagara: 52; Grandee: 49
- Insulation. Niagara: FiberCor®; Grandee: Multiple layers of urethane foam
- Filter area. Niagara: 100 sq ft; Grandee: 325 sq ft
- Ozone. Niagara: Corona Discharge Ozone; Grandee: FreshWater III high-output ozone system (corona discharge…
- Salt system. Niagara: FreshWater® Salt System (part of FreshWater® IQ); Grandee: FreshWater Salt System (included; smart monitoring and dosing…
Will the Niagara or the Grandee fit my space and deck?
The Niagara is 89 x 89 in, about 55 sq ft and 38 in tall; filled, it weighs 5,555 lb, about 101 lb per sq ft before anyone gets in. The Grandee is 100 x 91 in, about 63 sq ft and 38 in tall; filled, it weighs 5,810 lb, about 92 lb per sq ft before anyone gets in. Leave room around the tub for the cover lifter and the service panel, and have a builder check any deck for the filled weight plus people. See hot tub sizes, hot tub weight and what to put a hot tub on.
What electrical hookup do the Niagara and Grandee need?
The Niagara runs on 230V. The Grandee runs on 230V. The table lists amperage and breaker as each maker prints them. A licensed electrician sizes the circuit and the GFCI protection for the model you buy. See hot tub electrical requirements.
Do the Niagara and Grandee carry the same warranty?
Caldera Niagara: 10 years on the shell structure, 7 years on the shell surface, 5 years on the equipment, 5 years on the plumbing and 5 years on the cabinet.
Hot Spring Grandee: 7 years on the shell structure, 7 years on the shell surface, 5 years on the equipment, 5 years on the plumbing and 5 years on the cabinet.
Read the warranty card before you sign: labor after year one, travel charges, and whether coverage moves to a second owner. The hot tub warranty comparison lines up every brand.
What do the Niagara and Grandee sell for?
Caldera Spas lists the Niagara at $24,999 (maker's list price, Oct 2026). Hot Spring lists the Grandee at $26,499 (maker's list price, Oct 2026). Delivery, the pad, the electrician and the cover lifter are extra. Each model's price and where it comes from: Caldera Niagara price and Hot Spring Grandee price.
Which costs less to run, the Niagara or the Grandee?
The Niagara, by 9 W on standby, about $1.20 a month. Standby is what a tub draws to hold its temperature with the cover on and nobody in it. California tests it the same way for every spa sold in the state, so it is the fairest running-cost figure we have.
The Niagara draws 203 W in California's standby test (filed at 388 gallons), about 148 kWh and $26.96 a month at the U.S. average rate. 56% of the 117 filed tubs its size draw more; their median is 210 W.
The Grandee draws 212 W in California's standby test (filed at 445 gallons), about 155 kWh and $28.15 a month at the U.S. average rate. 67% of the 97 filed tubs its size draw more; their median is 223 W.
Costs use the U.S. average residential rate of 18.19¢ a kWh (January to July 2026, EIA). Your own rate, climate and how often you use the jets change the bill. Hot tub running cost works it out by state, and measured standby watts lists every filed model.
What to check in the showroom
- Sit in both, dry is fine, in the seat you would use most. On a running display tub, feel the jets with the back of your hand. Seat depth and where the jets land matter more than the count.
- Climb in and out: step height and the lounger's length suit some bodies and not others.
- Ask for each model's California Energy Commission listing and the warranty card.
The full spec sheets: Caldera Niagara hot tub and Hot Spring Grandee hot tub. Brand against brand: Hot Spring vs Caldera.
Other model comparisons: Hot Spring Grandee vs Vanguard and Hot Spring Envoy vs Grandee.
Still deciding? Get the price range on both.
- Caldera Niagara$24,999Maker's list price (MSRP)
- Hot Spring Grandee$26,499Maker's list price (MSRP)
Free price range, then one dealer.
Common questions
What is the difference between the Caldera Niagara and Hot Spring Grandee?
Both seat 7. The Niagara measures 89 x 89 x 38 in and the Grandee 100 x 91 x 38 in. The Niagara has 52 jets to the Grandee's 49, as the maker counts them. Prices: the Niagara $24,999 (maker's list price, Oct 2026), the Grandee $26,499 (maker's list price, Oct 2026). The table lists every published figure side by side.
Which is bigger, the Niagara or the Grandee?
The Grandee: 100 x 91 in, about 63 sq ft, against 89 x 89 in, about 55 sq ft for the Niagara. The Niagara holds 400 gallons and the Grandee 455.
Which costs less to run, the Niagara or the Grandee?
The Niagara: 203 W on standby against 212 W in California's tests, about $26.96 against $28.15 a month at the U.S. average of 18.19¢ a kWh (EIA, January to July 2026). Heating fresh water and running the jets add to that.
Do the Niagara and Grandee have the same warranty?
No. Shell structure: 10 years on the Niagara, 7 years on the Grandee. Read the warranty card for labor and transfer terms.
How much do the Niagara and Grandee cost?
Caldera Spas lists the Niagara at $24,999 (maker's list price, Oct 2026). Hot Spring lists the Grandee at $26,499 (maker's list price, Oct 2026). Delivery, the pad and the electrician are extra.
Sources
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- Caldera Spas Niagara product pagemaker's specifications
- Caldera Spas warrantyNiagara warranty terms
- Hot Spring Grandee product pagemaker's specifications
- Hot Spring Grandee specification sourcesize, jets and electrical
- Hot Spring warrantyGrandee warranty terms
- California Energy Commission appliance database (spas)standby watts
- EIA Electric Power Monthly, Table 5.6.BU.S. average residential rate, 18.19¢ a kWh, January to July 2026