Plastic Windows Today Produce a Number of Large and Small Enterprises. TheFore, The Quality, Operational Characteristics of Products Can Be Different. In Addition, The Windows have Structural Features: They Differ in the Number of Internal Chambers, Sizes, Shape. Firms Production Plastic Windows Specialize in Profiles Containing From Two to Four Cameras. But at the Request of Customers, it is Possible to manufacture multi -Chamber Structures. Three -Chamber Profiles Are the Predominant Products of Most iVanovo Manaufacturers. SUCH Window PVC AreCterized by High Mechanical Streng, Low Thermal Conductivity and Good Sound -absorbing Properties. The Material That is Used In Production Is Moisture Resistant, Well Opposes The Negative Effects of the Atmosphere and Technogenic Factors. SUCH Windows are Intended for Installation, Both in Residential Premuses and Offices.