How dust affects heavy machinery HVAC and cabin air quality
Dust is the defining environmental factor for mining HVAC. Here is how it moves through the system and what to do about it.
CALL 069 268 0988Where dust enters
Dust enters through fresh-air intakes, damaged door and window seals, cable gland openings and worn filter housings. Once inside it settles on the evaporator, where moisture turns it into a restrictive layer.
Effects on performance
A dust-loaded evaporator reduces airflow and can freeze. A dust-loaded condenser reduces heat rejection. Both push the compressor towards higher loads and shorter life.
Filtration and pressurisation
A correctly pressurised cab keeps dust out by maintaining slightly higher pressure than outside air. This depends on intact seals, a working pressuriser fan and clean pressurisation filters — not on the air-conditioning circuit itself.
Practical maintenance
Set filter intervals by conditions rather than by hours alone, inspect seals at every service, and clean condensers and evaporator cores on a schedule that matches the site's dust levels.
Related guides
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