The design and development costs of system windows and doors, brand value, and high‑performance standards for materials such as steel and hardware all contribute, to varying degrees, to the higher cost of system windows and doors. As an integrated, high‑performance system, they are more complex than traditional energy‑efficient windows and doors. So, which brand is best? When choosing system windows and doors, three key factors should be considered—what exactly are they? Let’s take a brief look together.

　　The brand selection for system windows must align with the property’s grade, and tendering for system windows should consider both brand and price. Manufacturers of system windows within the same brand offer different product lines; the specific line should be chosen based on marketing positioning and design requirements, with detailed specifications finalized by the manufacturer. As a complex and critical project, the system window manufacturer must engage early to provide a comprehensive system solution, thereby mitigating potential cost fluctuations in later stages.

　　Which brand is best for doors and windows? Are system windows really that expensive? Let’s take a quick look together.

　　1. As system windows and doors gain increasing market acceptance and the market continues to expand, their overall costs are steadily declining. Currently, the base price for system windows and doors on the market is around RMB 1,000 per square meter, while higher‑quality options typically start at RMB 2,000–3,000 per square meter or more. In first-tier cities such as Beijing and Shanghai, where real estate prices range from RMB 50,000 to over RMB 100,000 per square meter, adding just a few hundred yuan per square meter represents a relatively small additional cost. Although system windows and doors are slightly more expensive than conventional ones, the incremental cost per square meter is minimal compared to overall housing prices. To facilitate rapid sales, many property developers are willing to absorb this premium.

　　2. Based on the policy toolkit for regulating the real estate market, the state will, to a certain extent, restructure the sector, curb housing prices, and introduce a substantial supply of affordable and subsidized housing to stabilize the market. If housing supply remains ample, prices are likely to fall, and the market may stagnate; in such circumstances, developers will need to emphasize the quality and functionality of their properties as key selling points. Ultimately, those who can successfully market residential products that meet consumer preferences will enjoy strong sales.

3. Architectural doors and windows are an essential component of a building’s overall functionality and receive significant attention from real estate developers. Enhancing their performance and adopting high‑performance system windows and doors will also become one of the key selling points for residential properties.

Which brand is best for doors and windows? What are the five key performance levels of system windows and doors? Let’s analyze these together below.

　　(1) Wind-pressure resistance: Refers to the ability of exterior doors and windows to remain undamaged under wind pressure. This includes resistance to cracking, deformation or breakage of structural steel, glass breakage, adhesive failure, and loosening or obstruction of hardware. The performance is graded on a scale of nine levels, with system‑type doors and windows typically achieving an average rating of Level 6 (while the Meimen 98 series meets the higher international standard of Level 9).

　　(2) Air-tightness performance: Simply put, under normal conditions with exterior doors and windows closed, the ability to prevent air infiltration is classified into eight levels. System windows and doors typically achieve an average rating of Level 6, while imported system windows and doors attain a higher standard.

　　(3) Watertightness: Under normal closed conditions, the ability of doors and windows to prevent rainwater infiltration is classified into six levels; the average performance of system windows and doors meets the Level 4 standard.

　　(4) Thermal insulation performance: Refers to the U-value as defined in window and door terminology; system windows and doors must meet at least Grade 3 standards (the Meiwen 98 series achieves Grade 7, with a U-value of 1.2).

(5) Sound insulation performance: Also referred to as soundproofing, it refers to the ability to reduce sound transmission from the source to the listener. It is classified into six levels, with system windows and doors required to meet at least Level 3 standards.