With over 100 years of experience, the Howden engineering team has developed an ultra low NO2 emissions mine heating solution that can be fully integrated with an existing ventilation system.



Emissions regulations compliant

To support mine safety, there is an emerging global trend to reduce levels of human exposure to NO2 in mining workplaces. In Canada, the generally accepted threshold level has been 3 parts per million (ppm). However, there is a recent trend to reduce this level to 0.2 ppm – which is 15 times lower than it was in the past.

In Canada, permissible exposure levels for NO2 are regulated by province/territory. To date, the ACGIH exposure limits for NO2 at TLV-0.2 ppm and STEL 1.0 ppm have been adopted by British Columbia, Manitoba, Newfoundland and Labrador, and Nova Scotia.

Howden's Ultra Low Emission Heaters cold flame technology provides uniform temperature differential while maintaining NO2 emission under 0.2 ppm, significantly reducing its exposure to miners.

Seamless integration

Howden’s Ultra Low Emission Heaters have been designed by some of the world’s leading mine ventilation and heating experts with decades of experience in combustion and heating system design and installation as well as in fan and ventilation system design and installations. This has allowed Howden the in-house ability to deliver a solution that:

  • Provides the lowest direct fired mine air heating emissions available.
  • Can be seamlessly integrated into most existing mine ventilation systems.
  • Provides uniform heat distribution.
  • Protects the existing mine fan and associated devices from potential failure caused by heat stratification.
  • Maximizes safety and efficiency while reducing potential downtime and the need for additional footprint and retrofitting.

Ultra Low Emission Mine Heating Solution

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