Santi Max Plus Heating System Set
Santi Max Heating System Set
Santi BZ400 Extreme Heated Undersuit
Santi Heated Gloves
Snati Thermovalve 303
Santi Heated Gloves

Santi Max Plus Heating System Set

Sale price£1,065.00 Regular price£1,185.00
Save £120.00

Santi Max Heating System Set includes BZ400 Extreme Heated Undersuit with bag, Heated Gloves with all necessary cables and a Thermovalve 303. Both Santi 24Ah and the Blue Power 28Ah batteries have enough power for gloves and the undersuit to be used simultaneously.

Suit Size

Suit Size

Glove Size

Glove Size


Dispatched in 6 to 8 weeks

Contact Form & Details

Why Portland? 

We’re located on the Isle of Portland (in Dorset) because Portland has been one of the most popular scuba diving locations in the United Kingdom even before we set up operations here back in the year 2000.

On one side, we’re minutes away from the sheltered waters of Portland Marina and Harbour, while on the other, it’s just a brief walk to reach our famous scuba diving destination, Chesil Cove and Chesil Beach.  

Portland’s location makes it ideal for scuba diving, freediving, snorkelling and other water sports activities.

Alongside dive clubs, many instructors and dive schools travel here to train and offer scuba diving certification ranging from open water diver to mixed-gas tech diving or rebreather diving levels.

Whether you’re doing a boat dive from Portland Marina or Castletown or a shore dive at Chesil Cove, Portland is well known for offering many possibilities: Reef diving to wreck diving and night diving, underwater photography or underwater videography. Anything other than cave diving is possible here.

Likely being the best-stocked diving shop in the UK, at Underwater Explorers we offer in-store scuba diving equipment advice and sales, as well as gas fills, to locals and visitors (read About Us).

But... If you’re googling “scuba diving shop near me” like some, look no further, there's DirDirect online.

Here at DirDirect, we list our cutting-edge equipment for worldwide delivery and we’ve got you covered whatever your level of diving: We’re your local dive store wherever you are in the world.

All that with over 20 years of experience especially in technical diving, from training to equipment, advice and sales.


Underwater Explorers, Unit 1, Maritime Business Centre
Mereside, Portland, Dorset, DT5 1FD


Santi Max Heating System Set includes BZ400 Extreme Heated Undersuit with bag, Heated Gloves with all necessary cables and a Thermovalve 303. Both Santi 24Ah and the Blue Power 28Ah batteries have enough power for gloves and the undersuit to be used simultaneously.

Santi BZ400 Extreme Heated Undersuit

Santi BZ400 Extreme Heated Undersuit is designed to comprehensively protect the whole body of a diver from the cold. The heated undersuit heats the trunk, thighs and arms evenly.

The BZ400 Extreme Heated Undersuit is designed to be worn on top of a thin base layer allowing most of the generated heat to be passed directly to the diver’s body.

The heated Santi undersuit gives you the best thermal protection underwater. It keeps you warm and comfortable while heating, even when the batteries are low or completely drained.

The new generation of heating wire is covered with ultra-soft, silicone isolation resistant to breaking. Innovative, synthetic power cable is resistant to high temperatures and cuts.

  • Operating time on 24Ah battery: approx. 2h 30min - 3h
  • Made of BZ400 (420g/m2) Thinsulate™
  • Built in heating glove wires
  • Handy pocket on waist for power cord
  • P-valve hose opening
  • Net cuffs with rubber loops for thumbs
  • Elastic gussets under the armpits
  • Two side pockets
  • Elastic waist band
  • Two way entry zipper
  • Foot straps
  • Maximum heating temperature 45°C
  • Heating power: 110 W
  • Safety switch prevents from overheating
  • Wires covered with ultra-soft silicone resistant to breaking
  • Power cable resistant to high temperatures and cuts
  • Undersuit bag included
  • Mens stock sizes. Made to Measure option for ladies and men

FREE "Made to Fit" service

Very few divers require a totally made to measure suit due to the wide range of standard sizes available from Santi Diving. With this in mind, Santi offers a free of charge Made-to-Fit service to any standard size Santi Undersuit ordered, sculpting standard suits to a divers' measurements.

With your Santi Max Heating System Set order, you can request up to 4 changes (ranging from 2 to 5 cm) to any of the standard size measurements listed under chest, inner arm, biceps, forearm, waist, hips, inner leg, thigh, calf or body trunk on the Santi size chart.

Santi Heated Gloves 2.0

Santi Heated Gloves 2.0 are very soft and do not hinder movements. The thin heating cables are arranged and sewn to be practically imperceptible. Under your dry glove you don’t feel the difference – is it your normal gloves or the heated ones? But you can feel the difference in the comfort you experience.

Hands are the first to get cold. When chilled and numb, they cause discomfort. But they are also incapable of properly handling inflators or valves, taking pictures or videoing. Capable hands are also helpful if you want to quickly escape troubles underwater.

Evenly distributed heating wiring that allows for freedom of movement in palms. The gloves keep your hands warm even when the heating is not on.

Heated Gloves can be easily connected to Santi Heated Vest or Undersuits without additional cables.

  • Includes: gloves and cables
  • Breathable fabric
  • Maximum heating temperature 45°C
  • Maximum heating power: 36W (pair)
  • Maximum operating voltage: 12V

Santi Thermovalve 303

The Santi Thermovalve 303 has a 270-degree rotating head, an innovative solution in thermovalve design technology.

The low-profile Thermovalve 303 fully replaces the drysuit inflator valve cabling in power to connect to Santi heating systems, including heated undersuits, vests and gloves. Unlike the Santi Drysuit Connector, it has two functions simultaneously: an inlet valve and an integrated connector.

Thermovalve 303’s great advantage is placing the cable with the E/O connector in the down position, with the possibility of turning the head by 270 degrees, which allows for trouble-free connection of the hopper cable both in the position of the connector to the right and left.

  • Rotating head (angle 270°), equipped with a medium pressure connector
  • 270° moveable valve head for more convenient hose attachment which allows for optimal E/O cord and pressure hose settlement under the drysuit,
  • Includes two electrical connectors on opposite sides of the cable - a connector for connecting with a battery adapted to work in water (E/O cord) and a waterproof connector for connecting a Heating System products from Santi
  • Works with power supply no higher than 12V
  • Total length of the cables including plugs – about 55cm
  • Includes a two-piece nut
  • Santi Thermovalve 303 is available with APEKS or SI-TECH screw size

Santi Heating System at glanceSanti Heating System ExplainedDOWNLOAD MANUAL: Santi Heating System Manual


SKU: 2024.MAX.PLU.01

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