The compact Recair Sensitive 300 (RS300) is the natural choice for those who wish to improve ventilation and save energy, but do not have the space to accommodate the larger RS160. The RS300 has a width of 232 mm and a length of 481 mm. The height can vary from 150 mm to 500 mm. Decreased size does not, however, mean decreased performance: the only difference between the RS300 and the RS160 is the size.