India, Nov. 27 -- As air quality in Delhi NCR plunges deep into the severe zone, the United States Embassy has revealed an interesting detail about how it is battling the toxic winter smog. Instead of using popular consumer brands like Dyson, Philips, or Coway, the embassy relies on large-room Blueair purifiers and has now floated a major tender to restock the filters needed to keep them running round the clock.

The embassy has issued a solicitation to procure 1,200 boxes of True HEPA Particle Filters for Blueair's 500 and 600 Series machines. These models are part of Blueair's older but extremely powerful lineup, used globally in offices and government buildings that require high-volume air purification. The tender specifically mentions...