Bullfrog A7 vs A8 hot tubs compared
Short answer
The Bullfrog A7 seats 8 with no lounger in 88 x 88 in; the A8 seats 8 with no lounger in 94 x 94 in. Both are $12,095–$26,395 (maker's A Series starting prices, Oct 2026).
| Measure |  Bullfrog A7A Series |  A8A Series |
|---|---|---|
| Lineup | ||
| Series | A Series | A Series |
| Priceas labeled under each figure | $12,095–$26,395A Series starting prices (MSRP), Oct 2026 | $12,095–$26,395A Series starting prices (MSRP), Oct 2026 |
| Size | ||
| Seats | 8 | 8 |
| Length | 88" | 94" |
| Width | 88" | 94" |
| Height | 36" | 38" |
| Water | 528 gal1,999 L as published | 644 gal |
| Dry weight | 936 lb | 808 lb |
| Filled weightwater, no people | 5,349 lb | 6,327 lb |
| Jets and pumps | ||
| Jetsas the maker counts them | 196–234 | Not published |
| Jet pumps | 2 | 2 |
| Pump horsepoweras published | 2.5 HP per pump | 2.5 HP |
| Neck and shoulder jets | available via NeckEase NX and NeckPlus NX JetPaks®… | available via NeckEase NX / NeckPlus NX JetPaks |
| Electrical | ||
| Voltage | 240V | 240V |
| Amperage | Not published | 30/50A |
| Breaker | 50 | dedicated circuit breaker required; 50A standard, convertible… |
| 120V plug-in | factory-order option only (not a field conversion) | Not published |
| Heaterat 240V | 4 kW | 4 kW |
| Build and water care | ||
| Insulation | full foam, 100% closed-cell | 100% closed-cell full foam |
| Shell | acrylic | acrylic |
| Cabinet | Not published | EternaWood™ |
| Ozone | WellSpring™ Ozone System (O3) with an ozone jet | WellSpring™ Ozone Purifier System (optional) |
| Salt system | not offered | Not published |
| Built in | Not published | USA |
| Warranty | ||
| Shell structure | 10 years | 10 years |
| Shell surface | 7 years | 7 years |
| Equipment | 5 years | 5 years |
| Plumbing | 5 years | 5 years |
| Cabinet | 5 years | 5 years |
Verdict: The Bullfrog A7 suits buyers who want a smaller footprint (88 x 88 in) and a lighter load on a deck (5,349 lb filled). The A8 suits buyers who want a roomier shell (94 x 94 in).
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What is the difference between the Bullfrog A7 and A8?
Both seat 8. The A7 measures 88 x 88 x 36 in and the A8 94 x 94 x 38 in. Both are $12,095–$26,395 (maker's A Series starting prices, Oct 2026).
Both are Bullfrog Spas hot tubs from the A Series. 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. A7: 88"; A8: 94"
- Width. A7: 88"; A8: 94"
- Height. A7: 36"; A8: 38"
- Water. A7: 528 gal; A8: 644 gal
- Dry weight. A7: 936 lb; A8: 808 lb
- Filled weight. A7: 5,349 lb; A8: 6,327 lb
- Neck and shoulder jets. A7: available via NeckEase NX and NeckPlus NX JetPaks®…; A8: available via NeckEase NX / NeckPlus NX JetPaks
- Ozone. A7: WellSpring™ Ozone System (O3) with an ozone jet; A8: WellSpring™ Ozone Purifier System (optional)
Will the A7 or the A8 fit my space and deck?
The A7 is 88 x 88 in, about 54 sq ft and 36 in tall; filled, it weighs 5,349 lb, about 99 lb per sq ft before anyone gets in. The A8 is 94 x 94 in, about 61 sq ft and 38 in tall; filled, it weighs 6,327 lb, about 103 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 A7 and A8 need?
The A7 runs on 240V with a 50 A breaker. The A8 runs on 240V. 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 A7 and A8 carry the same warranty?
Bullfrog A7: 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.
Bullfrog A8: 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.
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 A7 and A8 sell for?
Bullfrog Spas posts only a series range for the A7 and A8: $12,095–$26,395 (maker's A Series starting prices, Oct 2026). Delivery, the pad, the electrician and the cover lifter are extra. Each model's price and where it comes from: Bullfrog A7 price and Bullfrog A8 price.
Which costs less to run, the A7 or the A8?
The A8, by 25 W on standby, about $3.32 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 A7 draws 233 W in California's standby test (filed at 418 gallons), about 170 kWh and $30.94 a month at the U.S. average rate. 33% of the 100 filed tubs its size draw more; their median is 222.5 W.
The A8 draws 208 W in California's standby test (filed at 501 gallons), about 152 kWh and $27.62 a month at the U.S. average rate. 78% of the 64 filed tubs its size draw more; their median is 227.5 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: Bullfrog A7 hot tub and Bullfrog A8 hot tub. The series: Bullfrog A Series.
Other model comparisons: Bullfrog A7 vs X7, Bullfrog A7 vs M7, Bullfrog A7 vs A7L, Bullfrog A6 vs A7 and Bullfrog A8 vs X8.
Still deciding? Get the price range on both.
- Bullfrog A7$12,095–$26,395A Series starting prices (MSRP)
- Bullfrog A8$12,095–$26,395A Series starting prices (MSRP)
Free price range, then one dealer.
Common questions
What is the difference between the Bullfrog A7 and A8?
Both seat 8. The A7 measures 88 x 88 x 36 in and the A8 94 x 94 x 38 in. Both are $12,095–$26,395 (maker's A Series starting prices, Oct 2026). The table lists every published figure side by side.
Which is bigger, the A7 or the A8?
The A8: 94 x 94 in, about 61 sq ft, against 88 x 88 in, about 54 sq ft for the A7.
Which costs less to run, the A7 or the A8?
The A8: 208 W on standby against 233 W in California's tests, about $27.62 against $30.94 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 A7 and A8 have the same warranty?
Yes, on the terms the maker publishes: shell structure 10 years, shell surface 7 years, equipment 5 years, plumbing 5 years and cabinet 5 years.
How much do the A7 and A8 cost?
Bullfrog Spas posts only a series range for the A7 and A8: $12,095–$26,395 (maker's A Series starting prices, Oct 2026). Delivery, the pad and the electrician are extra.
Sources
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- Bullfrog Spas A7 product pagemaker's specifications
- Bullfrog Spas A7 specification sourcesize, jets and electrical
- Bullfrog Spas A7 specification sourcesize, jets and electrical
- Bullfrog Spas warrantyA7 warranty terms
- Bullfrog Spas A8 product pagemaker's specifications
- Bullfrog Spas A8 specification sourcesize, jets and electrical
- Bullfrog Spas A8 specification sourcesize, jets and electrical
- 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