Ready-to-use hot tub with a Rexener PR200 water heater 

  • An easier, faster and more comfortable alternative to a wood-fired hot-tub
  • Low consumption. Heat maintenance easy and inexpensive.
  • Precise thermostat control 0-45ºC
  • Works with biodiesel, diesel or fuel oil
  • Fast water heating
  • No smoke nuisance
  • Easy to install
  • LED-light included

We haven’t actually reinvented the bike but made a better version of the old one! The Rexener hot tub is much easier and more comfortable to use than a regular hot tub. Now you can bathe every night, because the Rexener hot-tub is warm 24 hours a day, 7 days a week if you want – and the water is always crystal clear.

The Rexener Unnukka hot tub is made of the best components on the market; we use Europe’s largest hot tub suppliers, Kirami’s, hot tub. This, combined with the high-quality and high-efficiency Rexener PR200 heater, guarantees you an unparalleled and effortless bathing pleasure.

The Rexener hot tub heats up with a biodiesel-powered Rexener PR200 water heater, it gets bath-ready in couple of hours – including an hour of water filling. Compared to many traditional wood-burning stoves, it is fast as a lightning. You decide the temperature that is suitable for bathing and Rexener makes sure that the water temperature stays there – no more ice cold or burning hot tub!

Depending on what you choose, the Rexener water heater uses biodiesel, diesel or “red diesel”. You can also use the Rexener PR200 in a detached house area, as there will be no visible smoke from the heater to disturb the neighbours. The good efficiency of the Rexener PR200 heater means that the heater does not cause harmful exhaust emissions. Practically only carbon dioxide comes out of the exhaust. The heater requires very little electricity.

Rexener Unnukka is designed for 4-6 people at a time. The volume of the hot tub is 1540 liters. Rexener Unnukka is a completely ready-to-use package. By ordering it together with the installation service, you don’t have to worry about anything else than finding a perfect spot for the hot tub.

  • Rexener Unnuka hot tub
  • PR200 heater
  • Chimney
  • Fuel tank
  • Mass filter kit
  • Includes both water circulation pump and filter
  • Protective box that contains the heater, fuel tank and mass filter kit (NOTE: The protective box is not thermally insulated!)
WEIGHT 43 kg
DIMENSIONS 38 × 58 × 86 cm
POWER 20kW / hr
CONSUMPTION 2,0 L/h (Note: thanks to the thermostat, actual consumption is much lower)
FUEL Biodiesel, diesel or fuel oil
THERMOSTAT  0-45ºC
POWER CONSUMPTION 80W (230V, 50Hz)
NOISE LEVEL 48 dB
CONTROL Digital touch panel
TANK 23 L external tank
WATER CONNECTION 38 – 75 mm (38 mm inner diameter)

Technical information


OUTER  DIAMETER 170 cm
VOLUME 1420 L / 4-6 persons
DRY WEIGHT 157 kg
EXTERIOR COLOUR ST-CB Coal Black
INNER COLOUR Light grey
POOL SIZE Depth 90 cm, height 107 cm
TOTAL LENGTH 236 cm
PROTECTIVE CASE DIMENSIONS 97,5 cm (P) x 129,5 cm (L) x 112,9 cm (K)