Millions of passengers pass through Hong Kong's MTR stations every day — and the washrooms bear the brunt. Persistent odour from high-traffic facilities bled into nearby retail shops. Shopkeepers cranked up air conditioning and over-rode ventilation to compensate, driving up electricity bills without solving the problem. The smell kept coming back. The costs kept climbing.
RHT installed ceiling-mount NCCO units (RH-490C) in station washrooms to break down ammonia, VOCs, and bacteria at the molecular level. The numbers speak for themselves: over 90% TVOC reduction, over 80% ammonia reduction, and zero odour complaints from nearby tenants. The energy savings from reduced ventilation override were the unexpected bonus — lower costs as a by-product of cleaner air.