Justus Austin 5 II wood stove 5 kW steel

Justus Austin 5 II Wood Stove with 5 kW for Continuous Operation

The Justus Austin 5 II wood stove is one of the few stoves in its class approved for 24-hour continuous operation - ideal for anyone who wants consistent warmth without constant refueling. With a nominal heat output of 5 kW, it heats rooms up to 88 m³ and achieves an efficiency of 80%. The high-quality black steel casing combined with the robust vermiculite combustion chamber ensures durable quality and optimal heat distribution.

In addition to the steel version, you can also find the stove in our shop with natural stone coverings made of soapstone or cream limestone. The soapstone covering stores the generated heat particularly effectively and continues to release it into the room long after the fire has gone out.

Features & Advantages

• 24-Hour Continuous Operation
  As a special quality feature, the Austin 5 II is designed for continuous operation over 24 hours - for consistent warmth without interruption. Since wood does not retain embers as long as coal, fuel must be added regularly.
• Justus Triple Air System
  This special system always ensures optimally dosed combustion air and guarantees clean, efficient burning with minimal emissions.
• Integrated Glass Cleaning
  With the integrated glass cleaning, you have a clear view of the flame - the viewing window stays clean longer and the flame play remains visibly undisturbed.
• Air-Through Door Handle
  The air-ventilated door handle ensures a comfortable temperature and prevents you from burning your fingers when opening the oven door - more comfort and safety in operation.
• Vermiculite combustion chamber
  The combustion chamber made of high-quality vermiculite stores heat optimally and ensures even temperature distribution with high durability.
• Multiple cladding options
  Available in black steel as well as with natural stone claddings in soapstone or cream limestone - for individual design options matching your living style.

Application & Area of Use

The Justus Austin 5 II wood stove, with its compact dimensions of 105.3 × 52.8 × 42 cm, is ideally suited for living rooms, open-plan living areas, and smaller houses. With a weight of 90 kg, it stands stable and secure, but should be set up by two people. The flue pipe connection with a diameter of 150 mm can be made either to the rear (940 mm connection height) or upwards (1023 mm) - providing flexible installation options depending on structural conditions.

Instead of using valuable indoor air, air from outside can optionally be used for combustion. For this, the wood stove must be equipped with a connection nozzle for external combustion air can be retrofitted. This is especially necessary in small or well-sealed rooms, where only a little oxygen is available. The external combustion air connection is made with a diameter of 100 mm to the rear or downward.

Approved fuels include wood, wood briquettes, and lignite. The maximum log length is 25 cm. For optimal combustion, a supply pressure of 10 Pa is required. The stove is approved as Type 1 for multiple occupancies on the chimney.

Do you still need the appropriate accessories for your Justus stove, e.g., stove pipes for connection to the chimney? No problem, you will of course also find what you are looking for in our shop. You can also get this model from us with a nominal output of 7 kW: Justus Austin 7 Wood Stove.

Approvals & Standards

• Ecodesign Stage 2 - Meets the requirements of the 2nd stage of the Federal Immission Control Ordinance for low emission values
• DIN EN 13240 - European standard for room-air dependent appliances for solid fuels
• 15a B-VG Austria - Approval for the Austrian market according to the local building regulations
• Munich and Regensburg Standard - Meets the strict local requirements of these Bavarian cities

FAQ: Common questions about the Justus Austin 5 II wood stove

For what room size is the Justus Austin 5 II wood stove suitable?

With a nominal heat output of 5 kW, the stove heats rooms up to 88 m³, which corresponds to approximately 35 m² of living space with a standard ceiling height. It is ideal for living rooms, open living areas, or smaller houses with good insulation. In poorly insulated old buildings, you should plan for a slightly smaller heating area.

What does 24-hour continuous operation mean on the Austin 5 II?

The stove is approved for continuous operation for over 24 hours - a special quality feature that not all wood stoves offer. This means you can keep it burning continuously without having to observe operating pauses. However, since wood does not hold embers as long as coal, you will need to regularly add fuel to maintain the heat output.

Can I set up the Justus Austin 5 II myself?

Basically, people with DIY skills can set up the 90 kg stove with two people. The minimum distances are important: 80 cm in front and 20 cm to the sides and back from combustible materials. However, connection to the chimney and inspection by the chimney sweep are mandatory. More about this in our magazine:Setting up a wood stove yourself: Instructions, tips & chimney sweep approval

Which wood is suitable for the Austin 5 II?

Oven-dry logs with a maximum of 20% residual moisture are recommended, e.g., beech, oak, or ash. Wet or treated wood reduces efficiency and increases soot deposits. The maximum log length is 25 cm. Alternatively, you can also use wood briquettes or brown coal. More on this in our magazine: Storing firewood correctly: Tips for optimal drying and storage

Do I need external combustion air for the Austin 5 II?

In well-sealed or small rooms, external combustion air is recommended to ensure sufficient oxygen for combustion. The stove has a standard connection for this, but requires a separate connection nozzle. The external air supply is provided with a 100 mm diameter at the back or bottom and prevents valuable room air from being used for combustion.

How does the glass air wash work on the Austin 5 II?

The integrated glass air wash directs preheated air along the inside of the viewing glass. This airflow prevents soot and combustion residues from depositing on the glass. This keeps the view of the flames clear for longer and significantly extends the cleaning intervals. The glass air wash operates automatically and does not require separate operation.

Justus - German Stove Tradition since 1837 Justus is a German wood stove brand with roots dating back to 1837 and today belongs to the Oranier group. The range extends from wood stoves to pellet stoves and solid fuel stoves - many models with the optional warmePLUS storage system for up to 13 hours of residual heat. The brand stands for a wide selection with optimized combustion technology and a particularly balanced price-performance ratio.

Technical Data

Nominal Heat Output

5 kW

Efficiency

80 %

Maximum Room Heating Capacity

88 m³

CO Emissions

947 mg/cm³

Fine Dust Emissions

39 mg/m³

Exhaust Gas Mass Flow

4.6 g/s

Flue Gas Temperature at Connector

300 °C

Dimensions (H x W x D)

1053 x 528 x 420 mm

Firebox dimensions (H x W x D)

380 x 310 x 240 mm

Weight

90 kg

Ø Flue pipe connection

150 mm

Direction of flue pipe connection

rear, top

Height from bottom edge to center of flue pipe spigot

1023 mm

Height to center of rear flue pipe connection

940 mm

Body color

Black

Cladding material

Natural stone, steel

Firebox material

Vermiculite

Approved fuels

Lignite, wood, wood briquettes

Max. length of fuel

25 cm

Required draft at nominal heat output

10 Pa

Multiple occupancy / design type

Yes / Type 1

Integrated glass cleaning system

Suitable for 24 h continuous operation

yes

Complied Standards, Approvals and Guidelines

Ecodesign Stage 2, DIN EN 13240, Approval for Austria according to 15a B-VG

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Technical Data

Nominal Heat Output	5 kW
Efficiency	80 %
Max. Room Heating Capacity	88 m³
CO Emission	947 mg/cm³
Fine Dust Emission	39 mg/m³
Exhaust Mass Flow	4.6 g/s
Exhaust Temperature at Flue	300 °C
Dimensions (H x W x D)	1053 x 528 x 420 mm
Firebox dimensions (H x W x D)	380 x 310 x 240 mm
Weight	90 kg
Ø Flue connection	150 mm
Direction of flue connection	rear, top
Height from bottom edge to center of flue nozzle	1023 mm
Height to center of rear flue connection	940 mm
Body color	Black
Cladding material	Natural stone, steel
Firebox material	Vermiculite
Approved fuels	Lignite, wood, wood briquettes
Max. fuel length	25 cm
Required draft at nominal heat output	10 Pa
Multiple use / design type	Yes / Design 1
Suitable for 24 h continuous operation	yes
Complied Standards, Approvals, and Directives	Ecodesign emission limits Level 2, DIN EN 13240, Approval for Austria according to 15a B-VG
Brand	Justus
Article Number	justus-austin-5-ii-steel
EAN	4029807779991