Vinyl windows and doors feature a multi-chambered structure with excellent heat-insulating properties, exhibiting very low thermal conductivity—just 1/357 of steel and 1/250 of aluminum. This highlights the significant heat-insulating and thermal preservation effects of plastic windows and doors, especially suitable for modern buildings equipped with heating and air conditioning systems. Click here to add an image for further explanation.

Survey comparison shows that rooms with plastic steel windows can have an indoor temperature 4-5 degrees higher than those with wooden windows during winter; double-glazed windows are more effective in northern regions. According to testing by the Physics Institute of the Construction Research Institute, the heat transfer coefficient of single glass steel and aluminum windows is 64 W/M2K; for single glass plastic steel windows, it's around 47 W/M2K; and for ordinary double glass steel and aluminum windows, it's about 3.7 W/M2K. The heat transfer coefficient of double glass plastic steel windows is approximately 2.5 W/M2K. Windows and doors occupy 30% of the building's outer protective structure area, and their heat dissipation accounts for 49%. Therefore, plastic steel windows offer excellent energy-saving benefits.