Quality Management System

Sigma launched the awareness training program on ISO 9001:2015, 45001:2018 & 14001:2015

02/03/2023

With the desire of the Board of Directors to improve better quality to meet the increasing requirements of customers, the general trend in the world, as well as improve Sigma's position ...

Sigma implements the ISO 45001:2018 management system audit and monitoring program

20/10/2022

To be known as one of the leading M&E Contractors in Vietnam, Sigma Engineering JSC continuously strives to achieve international standards, including ISO 45001:2018 Management System in the construction of M&E ...

Sweating on HVAC system during operation

28/09/2020

Most projects have dew condensation in HVAC systems. The problem of inlet dew occurs in the slit air inlets and in the air inlets installed in common spaces. How to fix ...

Why is Ventilation so Important for Buildings?

19/08/2020

Ventilation is the essential process of replacing stale air with fresh air. Without proper ventilation, buildings become susceptible to stagnant air, where bacteria and carbon make the indoor air more polluted ...

Effects of harmonics caused by VFD of the HVAC loads in the modern power systems

06/05/2020

5S methodology was implemented at Mikazuki Spa & Hotel Resort Danang project

10/12/2019

5S is known as the foundation for implementing quality assurance systems from the point of view: If working in a healthy, clean, airy and convenient environment, the sentiment will be more ...

Advantages of Automatic balance valve in the Chiller system

03/10/2019

As one of the systems that are widely applied in many areas of daily life, the Chiller central air-conditioning system plays the role of producing cold water, providing cold water for ...

Some notes in the desgin of the domestic hot water system

19/09/2019

Currently, Sigma is executing many Grade A projects such as Marriott Da Nang, Mikazuki, Flamingo Cat Ba ... with the appearance of the domestic hot water system. However, many hot water ...

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