THE QUICKEST
AND MOST AFFORDABLE HEATING AVAILABLE
Heating system for whirlpools, swimming pools and hot tubs!Quick heating – hot tub in 2 hours
Heats with the touch of a button
A timer for improved energy efficiency
Year-round use
No visible smoke – can be used in residential areas
Low consumption. Economical.
Works with biodiesel
Quick heating – hot tub in 2 hours
Heats with the touch of a button
A timer for improved energy efficiency
Year-round use
No visible smoke – can be used in residential areas
Low consumption. Economical.
Works with biodiesel

EXAMPLE OF CONSUMPTION
- Hot tub water volume: 1,500 L
- Heating time from +7 °C to +38 °C approx. 2 h, including 1 hour water filling
- Consumption = about 4 l biodiesel or diesel.
Heating system for hot tubs, swimming pools and whirlpools



Bio Water Heater can be installed on a new or existing Spa, pool or hot tub water heating system. Rexener Bio Water Heater can replace your high consumption electric heater or a traditional wood-heated hot tub heater. Water heating can begin before the pool is full of water. This makes the heating faster.
The installation / replacement is easy and you can choose the installation package of your needs.
You can use Rexener Bio Water Heater with biodiesel, diesel or “red diesel”. You can also use the Rexener Bio Water Heater in a suburban area, as the heater will not cause visible smoke or smell that could disturb your neighbours. The high efficiency of Rexener Bio Water Heater heater also means that the use of the heater does not cause much harmful exhaust emissions. In practice, the exhaust only emits carbon dioxide. The heater only needs about 80W of electrical power.
With Rexener Bio Water Heater, you can keep the same water in your hot tub week after week by connecting a sand filter to the heater and using the appropriate pool chemicals. When the hot tub or pool is more convenient to use, the usage is more frequent. You can even get Rexener Bio Water Heater from us with an installation service.
Rexener Bio Water Heater also has the power to heat up a really large 50,000 liter swimming pool – all year round – even in Nordic countries! Rexener Bio Water Heater is truly reliable and we give it a 3 year warranty.

Bio Water Heater product packages

BASIC
For you who already have a circulation water pump and installation supplies.
1890 £ |
---|
Heater Unit |
Installation Kit |
Circulation Pump |
Energy Saving Kit |
Mass Filter |
Wooden protective case |

Bronze
For you who already have a circulation water pump. Great for swimming pools!
1.990 £ |
---|
Heater Unit |
Installation Kit |
Circulation Pump |
Energy Saving Kit |
Mass Filter |
Wooden protective case |

GOLD
The perfect kit for replacing the wood stove with the filter package.
2.290 £ |
---|
Heater Unit |
Installation Kit |
Circulation Pump |
Energy Saving Kit |
Mass Filter |
Wooden protective case |

GOLD PLUS
Preinstalled in the larger wooden protective case
3.090 £ |
---|
Heater Unit |
Installation Kit |
Circulation Pump |
Energy Saving Kit |
Mass Filter |
Wooden protective case |
ENERGY SAVING KIT
TIME YOUR HEATING PERIODS WITH YOUR SMART PHONE
- Extra savings; by running the heater every 6 hours, you save up to 2/3rd of the heating costs compared to continuous heating.
- Let the water temperature get lower when you don’t use your Spa/Pool/Hot Tub
- Fast heating up to bathing temperatures again
- Available as a spare part

TECHNICAL DETAILS
Weight | 43 kg |
Dimensions | 38 × 58 × 86 cm |
Consumption | 2,0 L/h (Note: thanks to the thermostat, actual consumption is much lower) |
Power | 18,5 kW / h |
Fuel | Biodiesel, diesel or fuel oil |
Thermostat | 0-40ºC |
Power consumption | 80W (230V, 50Hz) |
Noise Level | 48 dB |
Control | Digital touch panel |
Tank | 30 L External tank |
Water connection | 38 – 75 mm (38 mm Inner diameter) |
Pipe dimensions | 100 cm without pipehat and 110 cm with pipehat. |


















