Good bathroom ventilation is suggested to avoid moisture and excess build-up from biological pollutants such as mold and mildew. Excess pollutants are not only detrimental to your health, but can also lead to the deterioration of structure supports and walls. As the trend to larger spa-like bathrooms continues to gain in popularity, the need for proper ventilation becomes more important. IAQSOURCE offers traditional, ceiling mount bath fans as well as inline bath fans and kits.