Removing burnt bricks Black carbon is a major problem Poor working conditions Working conditions


HZZK Differences

What differentiates Habla Zig-Zag Kilns from other technologies?

  • A completely consistent kiln in design and operation.
  • Efficient use of fuel reduces energy consumption.
  • Efficient firing process.
  • Offers almost complete combustion.
  • Efficient use of generated heat, it is recycled in a continuous process.
  • Design features: Long fire zone, roof, arch-less design, no tall chimney, scalable operating mode, power source flexibility, small construction footprint, easily mechanized.


  • Significantly reduces CO2 and Black Carbon (soot).
  • Improves health outcomes, working and living conditions of workers.
  • Uses existing workforce.


  • Significant fuel savings, increases profit.
  • Lower construction costs.
  • Low maintenance costs.
  • Short payback period.
  • Produces consistent, quality, saleable bricks increasing profits.
  • Carbon credit generation.
  • Significant foreign exchange savings as less imported coal is required i.e. Nepal and Bangladesh.


Compared to

Clamp Kiln: An ancient primitive technology. This kiln is highly polluting, inefficient fuel use and labour intensive. Wide spread use in India and Africa. Operated only in intermittent mode.

Hoffman Kiln: Invented in Germany 1858. Designed with large, permanent masonry arches and expensive tall chimney approx. 30 metres tall. Kiln must operate in continuous mode.

Bull’s Trench Kiln-Movable Metal Chimney: Generally banned, still existent in places. Workers together move metal chimneys as the fire moves through the kiln. High emissions and hazardous working conditions.

Fixed Chimney Bulls Trench Kiln (FCBTK): Prevalent in South Asia (India, Bangladesh and Nepal) where pressure for low emission technology is mounting, due to highly polluted air and related health concerns. Has a tall expensive 30 metre chimney, highly polluting. Seasonal use only i.e. cannot be used during the monsoon. Operates only in continuous mode.

Tunnel Kiln: Has minimal emissions, mechanized/highly automated processes, expensive to construct, requires reliable power/electricity supply

Vertical Shaft Brick Kiln (VSBK):  Reasonably fuel efficient, limited by a low throughput. Highly clay specific. Bricks carried via a ramp or steps to the top of firing shaft.

Habla Kilns wins 2017 UNAA Business Climate Action Award

Habla Kiln's successful application of clean, clay brick firing technology in an overseas setting has made it the inaugural winner of the 2017 UNAA  (United Nations Association of Australia) Business Climate Action Award. 

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