A realistic look at how dust control, HEPA vacuuming, vent cleaning, and better cleaning habits can make workdays easier during allergy season Most offices don't need a new HVAC system or an air purifier on every desk to make allergy season more bearable. They need a cleaning plan that actually accounts for where allergens settle inside the building, which methods remove them, and which common habits quietly make things worse. That's what allergy-friendly office cleaning is.