Pellet stove smoke generally produces lower emissions than traditional wood stoves when the system is properly installed and used correctly; however, it is not completely harmless. Because pellets are made from compressed biomass, combustion can release carbon monoxide (CO), fine particulate matter (PM2.5), and small amounts of volatile organic compounds. In poorly ventilated indoor environments, these substances may accumulate and irritate the respiratory system. The risk increases when the stove has low combustion efficiency, an inadequate chimney draft, or insufficient maintenance. Individuals with asthma, COPD, or cardiovascular conditions may be more sensitive to prolonged exposure. Using a certified stove, ensuring proper chimney design, performing regular maintenance, and maintaining good indoor ventilation are essential to minimize potential health risks associated with pellet stove smoke.