This study investigates the emission characteristics of volatile organic compounds (VOCs) and aldehydes (HCHO) from ventilation air filters manufactured using two different bonding methods: chemical bonding and thermal bonding. Small-chamber tests were conducted in accordance with KS ISO 16000-9:2006 to quantitatively compare the hazardous substance emissions of five filter specimens with varying bonding mechanisms and exposure surface conditions. The results show that filters produced by thermal bonding exhibited non-detectable (N.D.) levels of toluene, TVOC, and formaldehyde, demonstrating that this manufacturing method inherently minimizes chemical emissions by avoiding the use of adhesives. In contrast, filters manufactured through chemical bonding released formaldehyde ranging from 0.002 to 0.006 mg/m2·h, which is attributed to residual binder components used during the manufacturing process. Although these levels meet the highest grade criteria (≤ 0.008 mg/m2·h) in the Korean eco-friendly building material certification for wallcoverings, meaningful emissions were still observed, and potential grade changes may occur depending on adhesive type, solid content, and coating amount. Furthermore, this study found that differences in the exposed surface (single-sided vs. double-sided) significantly influenced calculated emission rates. This result revealed the limitations of applying building-material-based chamber test methods to filter materials through which air directly flows. These findings highlight the necessity of developing dedicated testing standards for ventilation filters, including appropriate exposure definitions. Overall, this research confirms that ventilation filters should be incorporated into institutional management frameworks alongside conventional building finishing materials, given their direct influence on indoor air quality.