Ventilation fans help maintain indoor air quality and regulate air temperatures by pulling in fresh air, circulating it through the indoor space, and exhausting stale air. Wall-mount ventilation fans install into wall openings and provide intake and exhaust air circulation. Ceiling-mount ventilation fans install into ceiling openings and exhaust stale air from the indoor space. Roof and attic ventilation fans remove heat, moisture, and stale air to reduce demand on the building's HVAC system. Inline fans integrate with existing ductwork and help ventilate industrial spaces. Crawlspace ventilation fans mount through a wall and provide ventilation to basements and crawlspaces to reduce moisture damage. Bathroom ventilation fans remove odors, stagnant air, and moisture from bathrooms to help freshen the air and reduce mold and mildew growth. Kitchen exhaust hoods install over kitchen equipment and remove heat, moisture, and odors from the kitchen space.