Conceived in 1929 and stepping into the market since 1935, RAINBOW has found its destinations into 1000's of homes throughout the globe in 80 over countries. A remarkable machine with a 'life span" of 25 years, RAINBOW delivers unfailingly from air purifying to air sanitation, aromatherapy as well as air medication. A two litre or 4 litre basin to this standard one model machine is a great money and time saver for within that basin is used water..... that can be changed as often as we would want. One could literally "wash" the carpets, the mattress, the curtains, the sofas, the car's interior and a host of other functions. bedroomupkeep.blogspot.com and facebook.com/indoorhealth has much to share with you abouut indoor reality. RAINBOW is your answer within home, office and many other indoor locations.