Features PTR 4010 PTR 4050 Ioniser yes yes Ioniser output - 3.5 million per cubic metre Air filter yes yes Hepa filter yes yes Carbon filter yes yes Filtration level down to .003 microns down to 0.003 microns Area treated up to 30 cubic metres 35-70 cubic metres Clean air delivery rate - 193 cubic metres/hour Fan speeds 3 - low; medium; high 4 - night; day; pollens; rapid clean Digital display - 5 - on/off; fan speeds; Ioniser on/off; timer programmer; change filter pilot light Timer control yes - 2hr; 4hr; 8hr up to 12 hours Fragrance facility yes no Remote control yes yes Wattage 40 watts 40 watts Power lead 1.9 metres 1.9 metres Dimensions 30cm x 18cm x 29cm 45cm x 17.5cm x 43.5cm Wall mountable no yes