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Can heaters make asthma WORSE? The truth that respiratory experts want you to know

Heaters can exacerbate asthma symptoms by circulating dust and allergens, and by drying out indoor air, making airways more sensitive. Combustion-based heaters release harmful pollutants, while electric models are generally safer with proper ventilation and air filtration. Managing indoor air quality and humidity is key to staying warm without compromising respiratory health.