Abstract: For use in residential buildings, a device to draw in outside air and have it mix with the air inside the building to improve indoor air-quality through dilution and building pressurization. Pressurizing a building even slightly inhibits air infiltration of pollutants such as pollen, mold spores, and seasonal allergens from entering penetrations ie, poor door and window seals, chimney, bathroom, dryer and stove exhaust ducts from entering the building.