The indoor climate of the workplace changes when the heating system is on. When the furnace or electric heat comes on and windows and doors close, this creates a more sealed environment for circulation of indoor pollution. What contributes to indoor air pollution? Even if there are no potentially toxic gases, powders or chemicals specific to your work environment; that does not mean that the air quality is good. There is pollution from cleaning products, dust, scented personal care products, animal dander (brought in on the clothing of workers). Urge your workplace management team to consider making the workplace a scent free zone. Keep you asthma well controlled; follow your written asthma action plan to guide you through changes in symptoms and keep your medication handy at all times.