22 GB

GB SERIES | Air Heater

1100 – 2500 W
3,700 – 8,500 BTU

Wallas 22 GB

Engineered to Minimize Amperage Draw in a Compact Heater

With 2.5 Kw of heating power, the Wallas 22 GB is perfect for smaller boats, camper vans, and trailers, and using only 1 amp at full power, it is an excellent option for sailboats. Improving on the older 22 Dt model, the 22 GB is more powerful and energy-efficient. Double inlet pipes ensure you have oxygen rich fresh air circulating in your boat. Wallas off-grid heaters are pleasant to use as the variable output eliminates system cycling and noise.

While a 22 GB is an entry-level compact 12 V diesel heater, it comes with an easy-to-use thermostatic control panel. Adjusting it to the desired temperature makes sure everyone is comfortable belowdecks.

PI THERMO CONTROL PANEL FOR COMFORT CONTROL
Simple panel is easy for everyone to use
START & STOP
Start and stop the heater simply by a press of a button
PI THERMO MODE
Use heater in PI Thermo Mode to set a target indoor temperature
MANUAL MODE
Switch to Manual Mode and control heating power with knob with a simple rheostat
VENTILATION MODE
Blow fresh air when heating is not needed
AIR BOOST
Increase the air volume quickly with Air Boost when defrosting or drying is needed
HIGH ALTITUDE MODE
High Altitude Mode must be set to adjust the combustion, when traveling more than 1300 m (4,200 ft) above sea level
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REMOTE CONTROL DEVICE FOR MORE OPTIONS
Turn your heater on remotely while you are still on your way to the marina
SAVE TIME WITH WALLAS 4430 REMOTE CONTROL ACCESSORY
Turn your heater on remotely with a PC or mobile device and enjoy a warm boat upon arrival
READ THE INDOOR TEMPERATURE
Remote control also allows you to check the cabin temperature and heater battery voltage from distance
CONNECTION THROUGH LTE/4 G NETWORK
The device needs to be installed with a SIM card with a data package for connection
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Two Inlets and Outlets Improve Airflow and Efficiency

Two inlets take fresh air from outside and recirculate heated air in the cabin. This improves efficiency and ensures oxygen rich air in the cabin. 

Two outlets reduce air drag and keep the sound level low. They also reduce power consumption and facilitate smooth distribution of heated air throughout the cabin. The bigger the cross-sectional area of the ducts are, the less it reducts the airflow and does not require more power from the ventilation fan. 

QUIET

Variable output eliminates disturbing system cycling and reduces noise.

CLEAN

Fully enclosed laminar burning process does not leak odors into the cabin and dries the indoor air.

DURABLE

Brushless blower motors have a very long life-cycle, supporting reliably long service intervals.

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GREENBOOST

Cleaner Burning

Updated software optimizes fuel and electricity consumption

Calibrated to burn renewable fossil free diesel (e.g. HVO)

Larger burner burns fuel slower resulting in ultra low NOX emissions

Extensively tested with Neste

Improved burner efficiency for more power

The Greenboost burner burns renewable fossil-free diesel cleanly and energy-efficiently

Two inlets and outlets improve fresh airflow and efficiency

Combustion air is taken from outside the boat through the outer coaxial pipe

Exhaust gas is safely expelled outside through the inner coaxial pipe keeping the indoor air clean and odourless

Fully enclosed laminar burning process ensures a quiet sound level and dries the indoor air

Variable output eliminates system cycling and reduces noise

Brushless blower motor has a longer life-cycle and requires less frequent servicing 

Feeding fuel directly from the main tank of the vessel saves space and eliminates the need for a separate tank

Durable Finnish design and manufacturing keep your heater running through tough weather conditions

Three second press-and-hold upon starting the unit improves safety for families with children 

Enjoy smooth temperature in cabin

Ensure everyone’s safety with a heater that has low temperature on unit and exhaust pipe

Keep interior upholstery fresh with dry heat from the laminar combustion

Have better comfort control with an easy-to-use thermostatic control panel

Save fuel and electricity with energy-efficient Wallas Greenboost technology 

HEATING
POWER

FUEL
CONSUMPTION

Wallas 22 GB fuel

ELECTRICITY
CONSUMPTION

TECHNICAL SPECIFICATIONS

Fuel: Diesel, HVO renewable diesel
Power: 1100-2500 W (3,700-8,500 BTU)
Operating Voltage: 12 V
Fuel Consumption: 0,10-0,25 l/h (3.4-8.5 oz/h)
Electricity Consumption: 0,55-1,0 A
Air Volume at min Heat: 51 m3h (30 cfm)
Air Volume at max Heat: 79 m3/h (47 cfm)
Length: 424 mm (16 11/16″)
Width: 140 mm (5 1/2″)
Height: 277 mm (10 7/8″)
Weight: 10 kg (22 lbs)
Mounting: Floor or wall

RECOMMENDED BUILDS

Boats: 5-7 m (16-22 ft)
Camper vans (retrofitted): VW T6, MB Vito
Trailers: 4 m (13 ft)

STANDARD PACKAGE CONTENT

Heater
PI Thermo Control Panel, wire 6 m (19 ft)
Fuel line 4 m (13 ft)
Power cable 4 m (13 ft) with connector and integrated fuse 15 A
Mounting plate, feet brackets
Accessory bag including essential clamps and screws

 4430 Remote Control is an additional accessory

MATERIALS

Stainless Steel, High-Grade Aluminum, Other Corrosion-Resistant Materials

Recommended builds should be used as general guidelines. The needed heat output is based largely on the material (wood, fiberglass, aluminum etc.) and structure of the boat. Always discuss this with a Wallas distributor, before making your purchase. 

Technical values are measured in a reference measurement wall, which is constructed to respond to a typical boat installation. Values have been measured with maximum length of ducting, exhaust pipe, fuel line, and power cord. Figures allow for 10% reserve – yours may vary.

Wallas diesel heaters are designed to run with standard road and boat diesel, as well as renewable fossil free diesel. Check with your distributor for further details on best options for your needs.

Wallas 22 GB 30 GB dimensions

Accessories in black are included in the standard package. Accessories in blue are additional. 

PI Thermo Control Panel Dimensions

Browse product manuals, spec sheets and more in the Documents Center

Do you currently have a Wallas Dt heater?

22 GB’s outside dimensions, controls, and connectivity are the same as in the older 22 Dt model, which makes it easy to swap units.

Reach out to your distributor to learn how to upgrade to a newer more efficient model and save money.