89 D

CONVECTION | Oven - Stove - Heater

1000 – 2200 W
3,400 – 7,500 BTU

Wallas 89 D oven-stove-heater

Bring Your Boat Alive with a Three-in-One Unit

Wallas 89 D is a remarkable multi-purpose cooking and heating unit that will make you love boating even more than before. The world’s first automatic diesel convection oven has a thermostat-controlled fan for fast and accurate cooking times. Now you can truly create the same flavors you would at home. As there is no exposed flame, it is safe to use at high temperatures and the fuel consumption is so low that an hour of cooking will only require approximately 0,25 l (8.5 oz) of fuel.

Diesel can be drawn from the main fuel tank of your boat, which saves a tremendous amount of space aboard. High-grade aluminum and stainless steel keep your Wallas intact for years. 89 D is as easy to operate as a domestic stove or oven. Simply start it by a press of a button and choose the desired temperature by turning the stepless thermostat knob. Use the left-side plate on the stove for cooking and boiling and the right-side for simmering at a lower temperature. On cooler days, lower the lid down and blow hot air for cabin heating to keep you warm. The lid is also a convenient protection for the ceramic surface. Imagine having one combination unit for three purposes! 

Diesel oven is as easy to operate as domestic appliances
Switch the stove on and control cooking heat steplessly by turning the knob
Switch the oven on and choose a desired temperature from the knob
Kettle holders keep your cookware in place


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, in addition to fossil-based diesel.

Combustion air is taken from inside the boat and exhaust gas is safely vented outside keeping the indoor air clean and odorless.

The exhaust gas also carries the moisture in the indoor air out keeping the air dry.

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

Perfect for environmentally minded boaters and campers.

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

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

Laminar combustion is a safe burning process with no exposed flame.

Domestic style convection oven cooks evenly.

Thermo sensors maintain a precise temperature level for fast and accurate cooking times.

Ceramic stove is easy to keep clean.

Blower lid operates as a forced air heater and is a convenient protective cover for the ceramic surface.

Unlike propane cooking systems, diesel stove-oven does not require gas inspections.





Fuel: Diesel, HVO renewable diesel
Oven Heating Power: 1000-2200 W (3,400-7,500 BTU)
Stove Heating Power: 900-1900 W (3,000-6,400 BTU)
Operating Voltage: 12 V
Oven Fuel Consumption: 0,1-0,25 l/h (3.3-8.5 oz/h)
Stove Fuel Consumption: 0,09-0,19 l/h (3.0-6.4 oz/h)
Oven Electricity Consumption: 1,6 A
Stove Electricity Consumption: 0,55-0,85 A
Length: 475 mm (18 45/64″)
Width: 472 mm (18 37/64″)
Height: 555 mm (21 27/32″) With the blower lid upward 885 mm (34 27/32″)
Weight: 38,3 kg (84.4 lbs)
Colors: Stainless steel


Stainless steel blower lid has a beautiful wood trim


Boats, Camper vans (retrofitted), trailers, cottages, tiny houses


Oven-stove-heater with control panel
Fuel line 4 m (13 ft)
Power cable 4 m (13 ft) with connector and integrated fuse 15 A
Accessory bag including essential clamps and screws


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

Oven and stove can be operated simultaneously, but starting both units at the same time is not recommended as the battery voltage might drop too low. It is advisable to start the units about 5 minutes apart.

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

Wallas diesel stoves, ovens, and 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 89 D dimensions

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

Oven control panel

Stove control panel

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

Are You Looking for an Oven?

If you are looking for an oven, but don’t need the full 89 D heating and cooking system, take a look at Wallas 86 D, which is the same oven without the stove and heater.


Reach out to your nearest distributor to determine the best solution for your needs.