Development Path
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In 1994, Shanghai Dehui Purifying Air-Conditioning Installation Co., Ltd. was established.
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In 2011, it was established as a subsidiary of Tofflon.
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In 2018, it obtained CE export certification for purifying air-conditioning equipment.
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In 2018, it obtained the 3rd class qualification for general contracting on construction engineering, the 2nd class qualification for professional contracting on electronic and intelligent engineering and the 2nd class qualification for professional contracting on building decoration engineering.
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In 2019, it obtained the 1st class qualification for professional contracting on MEP installation and the 2nd class qualification for professional contracting on fire fighting facilities engineering.
In 2023，it obtained the 1st class qualification for professional contracting on fire fighting facilities engineering and the 1st class qualification for professional contracting on building decoration engineering issued by the National Ministry of Construction.
In 2024，it obtained the 2nd class qualification for general contracting on construction engineering. |
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