Our FabStove uses a stove design, and combustion technique conceptualised and first built by Tom Reed in the 1990’s, and called a Woodgas Stove aka TLUD (Top Lit Updraft Stove. The stove introduced micro-gasification to the world of cooking with biomass fuels.
For more detailed information on TLUD gasifiers see Dr TLUD’s Web Site
Micro-gasification is a two stage closely coupled biomass combustion process that first heats the fuel, and converts the solid cellular components into volatile combustible gases. The second stage, located above the first stage, burns converted hot gas cleanly and efficient. This combustion technique dramatically reduces emissions and increases energy efficiency. It has been thoroughly tested as the cleanest biomass combustion technique available. Like Tom’s original design, we use a fan to control the airflow and fuel combustion rate.
The FabStove has been designed from the ground up to work in small kitchens and confined spaces. It burns biomass pellet fuel cleanly and efficiently with no smoke or smoky odours. It offers the convenience of a modern electricity or LPG stove at a lower operating cost, and is able to be used where these energy sources are limited or do not exist!
It is available as Single or a Double Unit.
KEY DIFFERENCES OF THE FABSTOVE TO OTHER BIOMASS GASIFIER STOVES
FAN ASSISTED FLAME MANAGEMENT WITH TWO USER CONTROLS
The Fabstove uses a small fan to “push” airflow through the stove base into the fire chamber in the Gasifer Canister. By varying the air flow, the wood gasification is increased or decreased. In a normal gas cooker, the fuel fed into the flame is varied and not the airflow.
A Fan Assisted (FA) TLUD outperforms a Natural Draft (ND) version in a number of ways and makes the solid fuel stove work just like its “gas cousin”!
Our user experiences are the following:
- A ND stove takes longer to light, and typically smokes until the device heats up and creates the right draft. You will be boiling water much sooner on a fanned TLUD. This saves a lot of time and fuel on short tasks such as heating washing water and making tea / coffee.
- A ND stove reacts to user airflow adjustments slower. i.e. turning up or turning down the airflow to increase or decrease the burn rate. The fanned device has a quicker response time making its operation act much like a normal LPG stove, and cooking a lot easier.
- A ND stove does not have the same turn up / turn down ratio. The air flow rate is determined by the vacuum created by the draught. A fanned device is controlled by an external source, and thus works very differently. Again making transitioning from boiling to simmering or the other way, when cooking, a lot easier.
- At the end of the burn, the fan speed in the FA stove can be turned up to get the last volatile energy out of the fuel, and ensures that there is no smoke. In a ND stove, there is a tendency for the last couple of minutes of the gas burn to be smokey. The device can be taken outdoors during this time, but this again drops the ease of use.
REMOVABLE GASIFIER CANISTER
Most gasifier stoves are built as a single unit i.e. the pot stand and base are integrated into a single unit. The FabStove is different!
It is modular and has a removable canister, avoiding the 2 major disadvantages of a single unit:
- With a single unit, the cook pot has to be removed for fuel reloading or any fire intervention. The handles are also on the sides making tipping out of ash problematic. The FabStove has a single handle making loading and unloading a breeze!
- Stability of the device is directly linked to the whole stove. Families are large and pots are BIG in our market. African cooking also requires a lot of stirring. By making the frame of the stove separate, the stability and safety of the stove is enhanced. The FabStove has the largest base and lower centre of gravity of any stove in its class