When selecting windows, you will often encounter technical terms; here is a plain-language explanation of them:
* **Air-tightness:** Refers to a window's ability to prevent air infiltration when closed. Better air-tightness effectively blocks outdoor dust and odors, reduces heat loss, and improves energy efficiency.
* **Water-tightness:** Refers to a window's ability to prevent rainwater penetration under the combined action of wind and rain. This is particularly important for regions with high rainfall.
* **Wind load resistance:** Refers to a window's ability to maintain functionality and avoid damage under strong wind loads. Residents of high-rise buildings and coastal areas should pay special attention to this indicator.
* **Sound insulation:** Refers to a window's ability to block noise. This depends heavily on the glass configuration (e.g., the use of insulating glass units or laminated glass), the sealing design, and the profile structure.
* **Thermal insulation (thermal performance):** Usually expressed by the K-value; a lower K-value indicates better thermal insulation performance. This is influenced by factors such as the width of the thermal break strips in the profiles (see below) and the glass configuration (e.g., Low-E glass).
