昌慎在廠房維護管理已有35年以上經驗，在越來越注重食品安全和生產安全的要求下，我們和擎鼎净化工程有限公司合作，按照ISO 14644系列無塵間標準，為社會打造更衛生更嚴格的生產環境，幫助工廠生產更安全可靠的良心產品。我們在香港具有由資深工程師和技術人員帶領的專業無塵間工程團隊，按工廠的生產流程，規劃合適的廠房間隔分佈，優化生產每一個環節的環境，務求提供穩定而優質的無塵間作生產空間。

Chong Shun Industrial Co. has been specialized in factory maintenance and management service for over 35 years. As the environment hygiene for productions and laboratories is always concerned by our users, we cooperate with Upting Purification Engineering Limited to construct qualified cleanrooms regarding ISO 14644, and to strive for facilitating a safe and hygiene environment for every factory or laboratory in Hong Kong. We have our own construction team with engineers and technicians for cleanrooms. According to the procedures of production lines, workers and interior space, we design an optimal layout of cleanrooms and optimize each procedure to provide a humane workplace and a stable cleanroom to our users.


無塵間工程均按照國際標準化組織(International Organization for Standardization)發表的ISO 14644系列無塵間標準(Cleanroom Standards)，按空氣清潔程度分類，分別分為10級、100級、1,000級、10,000級、100,000級、1,000,000級，數值越小，每平方米的塵埃數量越少，凈化級別就越高。
對食品加工而言，按100萬級標準。
對口罩生產而言，按10萬級標準。
對醫藥生產而言，按1萬級標準。
當生產環境要求越嚴格，所需級數越小，凈化級別就越高。​