Firebull S6 – convection stove with a solid door

Firebull S6 – powerful workshop convection stove with a solid door

At a glance

The Firebull S6 wood-burning convection stove has adjustable output of 4–11 kW and quickly heats cold or poorly insulated spaces of up to 230 m³. Its 80.1% efficiency saves fuel and running costs. The solid-door version is exceptionally robust and needs no glass cleaning, making it ideal for workshops and garages.

Description: A hard-working stove for demanding conditions

Looking for a heat source that can cope with dust, dirt and rougher handling? The Firebull S6 wood-burning convection stove with a solid door was designed for working environments where there is no time to polish soot-covered glass. Its unique tubular construction draws cool air in near the floor and rapidly releases it, warmed, into the room. This workshop stove provides noticeable warmth soon after lighting.

Key features

• High efficiency and fuel savings: The casing of substantial curved tubes and free airflow give the stove an efficiency of 80.1%, significantly reducing fuel consumption.
• Two-chamber combustion (CB system): Tertiary air is preheated through a long channel to support the further combustion of emissions, producing little ash and more heat.
• Precise output control: The front, rear and secondary air inlets are easily controlled by dampers, allowing smooth adjustment from 4 to 11 kW.
• Less cleaning: The solid metal door eliminates the need to repeatedly clean soot from a glass window and removes the risk of breaking it in the workshop.
• Compact size for logs up to 36 cm: Despite its practical dimensions, the combustion chamber accepts logs up to 36 cm long; 25 cm is optimal.

Where is it most useful?

• Garages and vehicle workshops: This rugged workshop stove compensates for heat loss even where doors are frequently opened and dust or grease is present.
• Site cabins and portable buildings: A robust steel shield against the cold that withstands frequent moves and rougher treatment on building sites.
• Boats, houseboats and mobile homes: A good choice for smaller, less well insulated utility spaces where the reliability and strength of a solid door matter.
• Garden buildings and older cabins: Ideal for quickly warming a cold building used only occasionally, as soon as you arrive.

Advantages over conventional stoves

Ordinary radiant stoves release heat slowly and initially warm only the air nearby. Firebull tubular stoves, like Canadian Bullerjan-type stoves, circulate warm air strongly and evenly throughout a building without noisy fans. That matters when you need warmth straight away.

Looking for a more decorative stove for an interior, combining performance with a view of the flames? See the Firebull S6 with a glass door.

Frequently asked questions (FAQ)

What warranty does the Firebull S6 have?

This Firebull S6 convection stove comes with a standard 3-year warranty, reflecting its reliability and durability in service.

What is the service life of the Firebull S6?

With correct operation, its service life can reach 20 years. It must not be overloaded for long periods or heated until the steel casing glows red. That does not happen when it is operated within the stated maximum output.

Can it be used as the main source of heat?

Yes, provided you choose a model with adjustable output and heating capacity suited to the space. This model covers 80–230 m³. The output must match the heat loss of your workshop, garage or other room.

Which fuel is suitable?

You can efficiently burn logs or wood briquettes up to 36 cm long. For maximum efficiency, 25 cm is the optimal length.

How long does one full load burn?

With dry, unsplit logs of optimal or maximum length and the air controls set for low-output burning, the stove can maintain a steady fire for up to 3 hours without refuelling.

How long does it give off heat after the last load?

It can burn and radiate heat for up to 7 hours after the last load of dry, unsplit roundwood. Set the air controls correctly to minimum and operate the stove for at least 8 hours beforehand to build up sufficient glowing embers. After it has cooled completely, the fire must be relit.

How often must ash be removed?

About once or twice a month. Firebull tubular stoves deliberately have no grate or ash pan: the fire burns directly on the bottom tubes and is lit on a bed of ash. Remove ash with a shovel or a suitable fireplace ash vacuum only when it reaches the lower edge of the loading opening. This essential insulating layer protects the bottom from direct heat. Repeated burning leaves very little fine dust.

How can excessive soot in the chimney be prevented?

Use only well-dried wood with moisture ideally below 20%. Wet wood reduces performance and produces large amounts of soot and tar. Do not keep the air supply fully restricted: too little oxygen prevents proper combustion and creates thick, heavy smoke.

How do I prevent smoke escaping while refuelling?

Ideally, add fuel when the previous wood has nearly burned away and embers remain on the ash. If the flue has a damper, make sure it is fully open. Before opening the door wide, fully open the primary and secondary air inlets.

Carefully release the handle and open the door only about 1–2 cm at first. Wait 5–10 seconds for flue gases to be drawn into the chimney. This equalises pressure between the firebox and the room and establishes the draught needed to keep smoke out of the living space. Then open fully, add the required logs promptly and safely, and close the door immediately.

Does the Firebull stove paint need to be cured?

Yes. Before first use, the paint must be heat-cured so that the surface finish hardens properly.

Curing procedure:

• During the first firing, heat the stove gradually to its stated maximum output.
• Maintain that output for approximately 2 hours.
• Ventilate the room well. Odour and smoke can occur as substances are released from the paint.
• Then let the stove cool completely.

The paint can also be cured outdoors, avoiding the need to ventilate a room. Follow these steps:

• Place the stove in a safe location suitable for operation.
• Connect a flue pipe at least 2 m high. This should be sufficient for curing the paint.
• Heat the stove gradually to its stated maximum output.
• Maintain that output for approximately 2 hours.
• Odour and smoke can occur as substances are released from the paint.
• Let the stove cool completely.
• Once cool, move and install it in its intended indoor position.

Note: Noticeable odour and smoke can occur during the first curing fire. This is normal while the heat-resistant paint hardens.

Important information

• Firebull convection stove installation and operating instructions
• Overview of Firebull stove heating capacities
• About Firebull stoves
• Energy label A