Intro to the The Jacuzzi® J-345
The Jacuzzi® J-345™ hot tub is a six to seven person hot tub for households that like to share. It has no lounger taking up space, so everyone sits facing each other and the open seating layout encourages conversation. In this guide we look at the seating, massage, water care, running costs and warranty, so you can decide whether it is the right hot tub for your home and garden.
How many people does the J-345 seat?
This model seats six to seven people. Instead of a lounger, every seat is upright and sculpted to support your body. That makes it well suited to families, couples who entertain, and anyone who wants to socialise rather than lie back on their own.
If you are comparing family hot tubs, our best 6 seater hot tubs buying guide sets it alongside other popular models.
What size is the J-345 and will it fit my garden?
The J-345 measures 214 x 214 x 92 cm, so you will need a level, solid base of at least that footprint, plus room to walk around the tub and lift the cover. It holds 1,306 litres of water, has a dry weight of 352 kg and weighs around 1,657 kg when filled, so the base must be able to take that load. It runs on a 32A electrical supply, which a qualified electrician will need to fit.
Our hot tub installation guide explains how to prepare the base and power supply before delivery day.
How powerful is the massage?
There are 41 PowerPro® jets, driven by two 2.0 HP pumps. The jets are positioned to work on specific muscle groups rather than simply moving water around:
- FX jets spiral and pulse to work the muscles of the mid back, with extended coverage for the thighs.
- MX lower back jets focus on the lumbar area, where many of us carry tension.
- PowerPro® Therapy Seats add a Swedish-style massage for the upper back, neck and legs.
- Individual seat air control lets each person adjust the intensity of their own seat.
The HydroSoothe™ massage pillow supports your head and neck, and gently cascades water over the neck and shoulders without splashing. Together, these give you a full-body hydrotherapy experience for relaxation and recovery. You can read more about the wellbeing side in our article on the benefits of hot water immersion.
What is Infrared and Red Light therapy?
A standout feature of the J-345 is a dedicated therapy seat with Infrared and Red Light therapy. Targeted light gently warms the lower back, adding to the warmth of the water and the hydromassage of the jets. It comes as standard, so there is nothing extra to add. If you want to enjoy infrared on its own, we also stock a range of infrared saunas.
How clean will the water stay?
Clean, clear water with less effort is a big part of ownership. The ClearRay® Active Oxygen water management system uses UV-C technology to help treat the water, working alongside 4-stage ProClarity™ filtration and a ProStream™ circulation pump. In practice, that means less time adjusting chemicals and more time enjoying your hot tub.
Is the J-345 energy efficient?
Running costs matter, especially through a British winter. The J-345 has SmartSeal™ multi-layered insulation. Jacuzzi states that its hot tubs are, on average, 22% more efficient than the California Energy Commission (CEC) standards, and that UK customers use around 5 kWh per day on average, based on 1,850 privately owned UK spas fitted with SmartTub® in 2022. Your own use will depend on how often you use the hot tub, the temperature you choose and where it is sited.
The SmartTub® app lets you check and control the hot tub from your phone, so you can adjust the temperature or spot an issue early without stepping outside.
Jacuzzi J345 price
If you are checking the Jacuzzi J345 price, it is £13,999 as of October 2026, plus a £250 install pack, and you can see the latest details here https://championhottubs.co.uk/product/jacuzzi-j-345
Is it built to last?
Every Jacuzzi® hot tub comes with a parts and labour warranty when registered for domestic use:
- Shell structure: 10 years
- Shell surface: 7 years
- Equipment and controls: 3 years
- Plumbing and components: 3 years
- Cabinet: 5 years
Tool-free ProFinish™ cabinetry and a propolymer foundation are designed to stand up to the UK weather.
What colour options are available?
You can choose from several acrylic shell colours and cabinet finishes, including Brushed Gray and Smoked Ebony cabinets. Colours always look different in person, so we recommend seeing the finishes in one of our showrooms before you decide.
How does the J-345 compare with other J-300 models?
The J-345 is one of two open seating models in the J-300™ collection, and the more compact of the two. Here is how it compares with its closest siblings:
- J-345: seats 6 to 7, open seating with no lounger, 214 x 214 x 92 cm
- J-385: seats up to 7, open seating with no lounger, 232 x 232 x 95 cm
- J-335: seats 5, with lounger, 214 x 214 x 92 cm
- J-355: seats 5, with lounger, 214 x 232 x 95 cm
If you want open seating with more space, the J-385 has a larger 232 cm square shell. If you would rather have a lounger, the J-335 has the same footprint as the J-345. Read our guide to the J-335, or browse the full J-300 collection, where every model is listed side by side.
Jacuzzi® J-345™ hot tub features
- 41 PowerPro® jets with two 2.0 HP massage pumps
- Seating for six to seven adults
- Infrared and Red Light therapy seat
- HydroSoothe™ head and neck massage pillow
- Individual seat air control
- ClearRay® Active Oxygen water care and 4-stage ProClarity™ filtration
- App control from your phone
- ProTouch™ touchscreen control
- Bluetooth sound system
- SmartSeal™ insulation
- LED interior and exterior lighting with an illuminated waterfall
- ProLast™ cover in black
See it in person
The best way to know if this is the right hot tub for you is to sit in it. Our team at Champion Hot Tubs can show you the full range at two showrooms: visit our Cheshire showroom or our Staffordshire showroom and we can talk you through finance options, delivery and installation. You can also view full specifications and pricing on the Jacuzzi® J-345™ product page, or get in touch with any questions.
Jacuzzi® J-345™ frequently asked questions
How much does the Jacuzzi J-345 hot tub cost?
At the time of writing (October 2026), the J-345 is £13,999. There is also a £250 install pack (cover lifter, steps and a chemical starter pack) and a delivery charge, estimated at £350 within 25 miles of our showrooms. A 10% deposit is taken when you order, and finance is available on selected models. Check the product page for the latest price.
How many people can fit in the Jacuzzi® J-345™?
It seats six to seven adults, with no lounger.
How many jets does the J-345 have?
There are 41 jets, including FX jets for the mid back and thighs, and MX jets for the lower back.
What are the J-345 dimensions?
214 x 214 x 92 cm. It holds 1,306 litres of water and weighs around 1,657 kg when filled.
What electrical supply does the J-345 need?
A 32A supply, installed by a qualified electrician.
How much does it cost to run a hot tub?
Jacuzzi’s UK figures show an average of around 5 kWh per day. What that costs you depends on your electricity tariff, how often you use the hot tub and the temperature you keep it at.
How long does a Jacuzzi hot tub last?
The J-345 is backed by a 10 year shell structure warranty and a 5 year cabinet warranty when registered for domestic use.
What is the difference between a Jacuzzi and a hot tub?
Jacuzzi® is a brand name, while hot tub is the general term. People often say “jacuzzi” to mean any hot tub, but the J-345 is a genuine Jacuzzi® model.
Does the J-345 have WiFi?
It uses SmartTub® cellular control rather than WiFi, so you can monitor and control the hot tub from your phone.
Does the J-345 have a lounger?
No. The seating is designed so more people can sit comfortably. If you want a lounger, look at the J-335 or J-355. If you want open seating with more space, look at the J-385.
Is the J345 the same as the J-345?
Yes. Jacuzzi J345, J 345 and J-345 all refer to the same hot tub.
Is the Jacuzzi J-345 worth it?
If you want a hot tub for family and friends, with powerful hydrotherapy, low-maintenance water care and a strong warranty, it is a strong all-round choice in the Jacuzzi® range, particularly if your garden suits a 214 cm square hot tub.
Ready to find out more? Explore the Jacuzzi® J-345™ or visit one of our showrooms to try it for yourself. If you want room to swim as well as relax, take a look at our swim spa range too.
