National Ventilation PPS/L/H Monsoon Energysaver Dryair Positive Pressure Loft Mounted System with HeaterAirflow Litresper Second 50 l s Decibel Rating 32 dB @ 3 m Dimensions (L)446 mm x (H)365 mm x (W)309 mm Guarantee 5 Years Height 365mm Length 446mm Motor Type DC Mounting Loft Number of Speeds 5 Packaging Types Each Power Rating 11. 5W Previously Known As PPS LH Product Range Monsoon Energysaver Unspsc V18 40101510 Unspsc V24 40101510 Voltage Rating 230V Weight 3. 98kg Width 309mm PPS L H Spec Sheet PPS works by gently introducing tempered air into