Technical blog
118 technical articles
VIDEO Video: Starduct's AI assistants Lê Na & Gemma
Two AI assistants working alongside the Starduct team, distributors and customers — from answering on the website and BOQ take-off to standard quotations, design and production — under four principles of trust in engineering data.
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VIDEO Video: the Starduct operation and maintenance training programme
Starduct's open, free training programme: seven product-line courses, manuals, slides and self-study videos, Q&A with Lê Na, an online test and a certificate with a QR code.
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VIDEO GenRoom Acoustics: plant-room noise and ventilation in one workflow
A 5-minute video: the Starduct engineering team uses GenRoom to calculate noise paths, simulate airflow, heat and sound fields, request detailed CFD and issue documents for generator rooms, chillers and cooling towers. Real example: Hanoi Parc.
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VIDEO Introducing the Starduct BIM library
Revit families that carry the same code and data as the catalogue, selection tools and orders: per-size order codes, one shared STD_ parameter set, stated data sources, preset IFC, direct download from product pages, and VAV units sent to Revit with their operating point.
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VIDEO Video: introducing the Starduct Partner Portal
A 2-minute video on the Partner Portal — where distributors do all their business with Starduct, from project registration, quotations and orders to delivery tracking. Every transaction is recorded, reaches the right person and can be looked up later.
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VIDEO Duct system calculator on the web: from the fan to the outlets on one page
A 3-minute video introducing the duct system calculator on Starduct Hub: lay out the run, size the ducts, compute losses, pick Starduct devices with order codes and get the bill of quantities.
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Spec for what?
Specification is what you want or you test your skills
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50th Anniversary of the Fire Prevention, Firefighting and Rescue Academy
The Fire Prevention and Firefighting Academy recently held a ceremony at its headquarters at 243 Khuat Duy Tien Street to celebrate its 50th anniversary. The fire protection equipment and technology exhibition was a highlight of the event, drawing strong interest from leaders of the Ministry of Public Security, the Academy's leadership and strategic partners.
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The Era of Smart VAV: IoT and Digital Integration
The integration of IoT and digital control is driving a revolution in the VAV terminal equipment market, transforming them from simple mechanical devices into smart components within modern building architectures.
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Stamping Square Diffuser SKD-S
1 piece stamping
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The "Anti-Quality" Story of Vietnamese Contractors
Reflecting on over 20 years of manufacturing and developing both domestic and international markets, I’ve noticed a massive disparity between how Vietnamese and international contractors evaluate products. I call it the “Anti-Quality”
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JOB and PROFESSION
Many young people, after 1–2 years of working, begin to think they have already “mastered a craft”, and then want to “spread their wings”, change environments and look for bigger opportunities. Conversely, there are also many people who have worked for 5–10 years yet, looking back, still cannot say they have “a craft”.
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STARDUCT LAUNCHES A STRATEGIC PARTNER PROGRAMME (OEM PARTNERSHIP)
An OEM partnership programme for duct, damper and air outlet manufacturers and MEP trading partners in provinces and cities who want to expand their product portfolio quickly and with quality, reduce the risk to their investment capital and focus on their core strengths.
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Can SMEs Contribute to GDP Growth of Over 10%?!
As SMEs participate more deeply in global value chains, the share of domestic value added in exports increases, the trade deficit narrows and the current account improves, thereby directly affecting the components of GDP = C + I + G + (X - M)
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PRESS RELEASE FROM STAR ASIA
Star Asia Officially Launches the First AHRI 880-Certified VAV Box “Starduct–Belimo” Made in Vietnam
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Technical Analysis: Air Leakage Test Results – VAV Box Model SVAV-S-06
This test result confirms that the Starduct–Belimo VAV Box not only meets but exceeds international standards, proving NSCA’s world-class expertise in HVAC product design and precision manufacturing.
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STARDUCT RECEIVES 2 POWDER COATING QUALITY CERTIFICATIONS AT ONCE
Thank you to our partners, customers and technical team for your trust and for accompanying us on our journey to achieve international quality!
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INVITATION TO THE STARDUCT VAV BOX LAUNCH EVENT IN HO CHI MINH CITY.
At HVACR Vietnam 2025, Star Asia proudly launches the first “Made in Vietnam” VAV Box range – completed to international standards (Ashrae 130, AMCA, EN) and globally certified to AHRI 880.
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Part 30: VAV SYSTEM INSTALLATION AND CONFIGURATION
A comprehensive overview of the processes related to Starduct–Belimo VAV (Variable Air Volume) Boxes, including quality inspection and system integration.
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Part 23: Sample Specification for High-Performance VAV Systems
This specification provides a comprehensive framework for the design, equipment selection and construction of high-performance VAV systems
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Part 24: Overview of Ductwork Design and VAV Box Selection
VAV (Variable Air Volume) systems play a central role in air-conditioning modern buildings
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Part 25: VAV System Design Methods to Optimise Cost and Performance
The main optimisation methods covered include four Design Tips and guidance on VAV duct design.
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Part 26: Factors Affecting Ductwork and VAV Box Sizing to Minimise Investment Cost
Sizing ductwork and VAV boxes aims to balance First Cost and Annual Costs, especially energy costs, in order to minimise Life-Cycle Costs (LCCs)
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Part 27: What Is the Role of VAV Box Inlet and Discharge Duct Design Factors in System Performance?
Based on the source documents, the design of the inlet duct and discharge duct of a VAV box plays a very important role in system performance (including pressure drop, life-cycle cost and noise).
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Part 28: 4 Game-Changing VAV System Design Tips
ASHRAE Guideline 36 arrived as a revolutionary solution. The aim of this guideline is for the industry's leading experts to create and maintain advanced sequences of operation
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Part 29: How do multi-zone and single-zone VAV systems fundamentally differ in structure and application?
The fundamental difference between a multi-zone VAV system (Multi-Zone VAV) and a single-zone VAV system (Single-Zone VAV) lies in their air distribution and control structure, as well as their scope of application
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Part 21: HVAC VAV System Design – Basis and Applicable Standards
When designing a VAV system, multiple industry standards and local codes must be referenced together to ensure the system meets technical, safety and performance requirements.
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Part 22: Implementation Stages of an HVAC System Using VAV Boxes
Implementing an HVAC system with VAV boxes requires tight management through every stage, from design and installation to operation. Each step has clear objectives and complies with technical standards (ASHRAE, TCVN, SMACNA, etc.)
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PART 19: Life Cycle Cost (LCC) Analysis of HVAC Systems
LCC helps project owners look beyond the initial investment cost (CAPEX) to assess the overall cost of owning a system throughout its service life, including investment cost, operating (energy) cost and maintenance cost.
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PART 16: WHY CAN VAV BOXES AFFECT ENERGY SAVINGS IN AN HVAC VAV BOX SYSTEM?
The Variable Air Volume (VAV) system is an advanced ventilation system commonly used in modern buildings, achieving energy efficiency and individual temperature control through a mechanism that adjusts the airflow rather than the supply air temperature
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Part 15: What Is the Minimum Operating Pressure (MOP) of a VAV Box?
• It is the minimum differential pressure across the VAV box required for the airflow sensor (usually a pitot cross/venturi, sometimes hot-wire) and the controller to measure & control accurately.
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COLOUR DURABILITY WARRANTY FOR THE POWDER COATING
The air-conditioning air outlet (grille) is a terminal product of the HVAC and ventilation system; it represents the aesthetics and architecture of this system in the elegant interior spaces of a building. It must therefore always be clean, attractive, refined and aesthetically durable.
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LOUVER SELECTION CALCULATION
In an HVAC system, a louver is not just a “wind screen” but also a barrier that protects equipment and interior spaces from wind-driven rain and dust, while ensuring the required airflow.
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PART 14: Combining ASHRAE Standards 62.1 and 90.1 in Heating, Ventilation and Air Conditioning (HVAC) System Design
Engineers often face challenges when trying to meet both standards at the same time. However, a Trane technical document has shown that, with proper system design and control, both objectives can be achieved effectively.
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INDOOR AIR QUALITY (IAQ) AND WHAT'S NEW IN ASHRAE 62.1-2022
ASHRAE 62.1: The primary standard for commercial/high-occupancy buildings, specifying the minimum outdoor air flow rate for each space, with the aim of ensuring air quality, health and energy efficiency.
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PART 11: AIR LEAKAGE CRITERIA IN VAV BOX SYSTEMS (VAV BOX AIR LEAKAGE)
A summary of the requirements for testing and evaluating air leakage through the casing and the damper/valve of variable air volume (VAV) terminal units, and the permissible limits
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Part 10: Multi-Zone Variable Air Volume (VAV) System?
A multi-zone variable air volume (VAV) system is a type of heating, ventilating, and air conditioning (HVAC) system designed to ensure space comfort in large facilities and commercial buildings
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PART 9: SINGLE ZONE VAV SYSTEM
The single zone VAV system, an advanced HVAC solution designed for large open spaces in commercial buildings.
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PART 12: ANALYSIS OF VAV BOX TEST RESULTS (AIR LEAKAGE RATING)
Analysis of the Closed Blade Air Leakage Test results of a 200mm VAV Box, compared against current technical standards: ASHRAE 130, AHRI 880 and BS EN 1751:1999.
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PART 7: CALCULATING AIRFLOW, PRESSURE AND SELECTING VAV BOXES
Accurate calculation of airflow, pressure, and selecting the appropriate VAV type is essential for achieving operational efficiency, energy savings, and desired indoor air quality.
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LUXURY APARTMENTS AND HOW TO IDENTIFY THEM FROM A TECHNICAL PERSPECTIVE
"Luxury is not in the stone cladding or the ceiling lights – it is in the technical systems behind the walls"
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FIRE PREVENTION FROM THE PERSPECTIVE OF SAFE ELECTRICAL SYSTEM INSTALLATION
Recently, a series of tragic fires have occurred, 70–80% of which were found to be caused by electrical short circuits. This raises a major question about the electrical installation capability on residential and even industrial projects in Vietnam.
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VAV SYSTEM DESIGN STANDARDS
Understanding the standards—designing it right from the start—is the foundation for young engineers to confidently create VAV systems that meet comfort, energy efficiency, and sustainability goals.
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How Does a VAV Box Work?
To understand and design a VAV (Variable Air Volume) system, it's essential to grasp the operating principles of a VAV Box and the formulas used in its control algorithms.
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TIMELINE OF US TARIFF DEVELOPMENTS 2018-2025
SECOND HALF OF 2025: Most Vietnamese exports to the US are subject to a 20% tariff. Chinese goods remain subject to Section 301 tariffs (7.5%-25%) and high AD/CVD duties, in addition to Section 232 tariffs (25%) for steel/aluminium.
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US RECIPROCAL TARIFFS AND OPPORTUNITIES FOR VIETNAMESE MANUFACTURERS (JULY 2025)
This article is a summary report assessing US trade policy and import tariffs on goods from Vietnam and China from July 2025, with a particular focus on fabricated steel and aluminium products.
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PART 5: Sales Consulting Skills for VAV Box Products
In short, a good sales engineer needs to listen to the customer's specific needs, identify their priorities (cost, comfort, aesthetics, energy savings, new technology…) and then adjust the focus of the presentation accordingly.
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Introduction to VAV Box and VAV System
This document provides only the basic concepts and scope—serving as definitions—for topics related to VAV Box products and VAV systems
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What is a VAV Box?
Once reliant on imports, Vietnam now produces high-quality VAV boxes locally. STARDUCT proudly stands as Vietnam’s first and only VAV manufacturer certified by AHRI 880—one of just 57 globally.
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From a Vietnamese Factory to the World: A Way of Thinking About Quality and Opportunity
“Exporting is an achievement. But more importantly, it is the natural consequence of the right mindset.”
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PART 2 - Efficient VAV System Design
“Designing an efficient VAV system requires an integrated approach—from accurate zone load calculations to optimized equipment selection, smart duct layout, and BAS-based control
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PART 3- VAV SYSTEM Control and Monitoring Strategies
“In the near future, we can expect VAV systems to be operated almost fully autonomously by AI—constantly maintaining the most comfortable environment at the lowest energy cost, while continuously learning to become more efficient over time.”
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Part 4 – Notes on Installation, Operation, and Maintenance of VAV Systems
“VAV systems are highly efficient and energy-saving—provided we remember to inspect them regularly.”
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Part 1-Comparison of VAV and VRF Systems
In practice, many investors choose a hybrid solution: for example, using VRF systems for smaller or renovated spaces, and applying chiller/VAV systems for larger areas, in order to balance the advantages of both.
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STARDUCT – LEADING FROM INNER STRENGTH, RISING GLOBALLY
After more than 20 years of steady growth, Starduct is officially entering a new era with a powerful transformation – restructuring the factory, redefining standards, and renewing its growth momentum.
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STARDUCT – TRANSFORMING TO LEAD, READY FOR GLOBAL SUPPLY
With over 20 years of steady growth, Starduct now enters a new era of transformation—upgrading its manufacturing scale, management systems, product strategy, and market presence to become a trusted HVAC partner for major projects and global supply chains.
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REMEDYING CONDENSATION AT CEILING-MOUNTED AIR OUTLETS
A common phenomenon • The frame and blade surfaces of the air outlet (ceiling-mounted type, connected to ductwork or directly to an FCU/AHU) develop condensation → water drips onto the floor, or soaks into the gypsum ceiling causing mould – damaging aesthetics and structure.
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AHRI Certified® mark for its Starduct VAV Box products
Ngôi Sao Châu Á (NSCA) is proud to be the first Vietnamese and ASEAN-based manufacturer to receive the prestigious AHRI Certified® mark for its Starduct VAV Box products, as of May 2024.
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Star Asia proud to announce the successful registration of two patents granted by the Vietnam Intellectual Property Office
Ngôi Sao Châu Á (NSCA) is proud to announce the successful registration of two patents granted by the Vietnam Intellectual Property Office (Cục SHTT) on May 13, 2024, for innovations in the field of fire protection (PCCC).
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Starduct’s VAV Box Selection Software
Starduct’s VAV Box Selection Software is a specialized digital tool developed by Ngôi Sao Châu Á (NSCA) to support engineers, consultants, and procurement teams in selecting the most suitable VAV Box and related components for HVAC systems.
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Unistar Work Platforms
Unistar Work Platforms by Ngôi Sao Châu Á (NSCA) are engineered to meet global safety and durability standards, making them ideal for industrial, commercial, and infrastructure applications.
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STAR ASIA Joins AMCA as a Member in the HVAC Ductwork Accessories Industry, Since 2019
STAR ASIA is proud to announce its official membership in the Air Movement and Control Association International (AMCA) since 2019
Read →ABOUT STAR ASIA JSC
Star Asia JSC (NSCA) is a leading Vietnamese manufacturer specializing in HVAC auxiliary products under the Starduct brand
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Starduct Fan-Powered VAV Box
The Starduct Fan-Powered VAV Box is a high-performance air distribution unit developed by Ngôi Sao Châu Á (NSCA) to meet advanced HVAC requirements in commercial and industrial buildings.
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STARDUCT INSULATION FIRE DAMPER (EI120) EN1366-1
The Starduct Insulation Fire Damper (EI120) is a high-performance fire safety component developed by STAR ASIA (NSCA),
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White Paper on Starduct VAV Boxes with and without fan-powered heating
Star Asia (NSCA) has officially released a White Paper on Starduct VAV Boxes with and without fan-powered heating, published on March 29, 2025.
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Starduct VAV COMPACT
The Starduct VAV COMPACT – Variable Air Volume Damper is a compact, high-performance air control unit designed by Ngôi Sao Châu Á (NSCA) for hot and cool air supply applications in modern HVAC systems.
Read →NSCA / STARDUCT – A Strong Step Forward After the Crisis
On the occasion of the 50th anniversary of National Reunification Day and International Workers' Day, NSCA Officially Brings Its New 15,000 m² Factory into Operation – A Strong Step Forward After the Crisis
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OEM/ODM Manufacturing Services | Starduct
Your Trusted OEM/ODM Partner in HVAC Manufacturing From Vietnam to the World – Certified Quality. Global Standards. ✅ VAV Boxes | ✅ Fire & Smoke Dampers | ✅ Air Grilles | ✅ Custom Sheet Metal Solutions
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LOOKING FOR GLOBAL OEM / ODM PARTNERS
High-Performace Air Volume Control Solutions AHRI 880 Certified Smart HVAC Made Affordable
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Guide to Selecting the Right Air Outlet for HVAC Systems (White Paper)
The purpose of this document is to provide in-depth guidance to help MEP engineers and project owners select the right air outlets for every type of building – from residential and commercial to industrial
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CLASSIFICATION OF DAMPERS IN HVAC AND FIRE PROTECTION
A more detailed look at the applications, operating conditions and how to decide which type of damper to use, in line with the SMACNA, AMCA, ASHRAE and QCVN0 06:2021/BXD technical standards commonly applied in residential, commercial and industrial buildings
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List of Vietnamese Products and Goods Subject to a 46% US Tariff (under Annex II)
Annex II is the list of products originating in Vietnam that are subject to a 46% import tariff rate into the United States, as a tough measure aimed at balancing the trade balance under US trade policy.
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US Tariff Policy on Aluminum and Steel Products Originating from Vietnam and China (Updated to 02/04/2025)
This report presents the current US import tariff policies applicable to finished, fabricated products made from aluminum bars, aluminum sheets and steel sheets originating from Vietnam and China.
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STARDUCT PUBLISHES A WHITE PAPER ON HEATED VAV BOXES WITH AND WITHOUT FAN ASSISTANCE
VAV BOXES WITH DIRECT REHEAT (SINGLE DUCT) AND WITH PARALLEL OR SERIES FAN ASSISTANCE (FAN POWERED)
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INTRODUCING STARDUCT CABLE LADDER AND CABLE TRAY
Starduct cable ladder and cable tray is a flagship product of Star Asia Technological Investment JSC (NSCA)
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Trade defence measures currently applied to products from Vietnam and China in the US and the EU.
The impact of production costs, tariffs and trade policy on the final price of products.
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EU import tariff policy on aluminium and steel (in France) as of 8/3/2025
Thanks to the EU-Vietnam Free Trade Agreement (EVFTA), in force since 2020, many Vietnamese aluminium and steel products enjoy deep tariff cuts when entering the EU, moving towards 0% after a 7-8 year roadmap
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Comparison of ISO 21925 and EN 1366 Compliance and Equivalence Analysis
Final Verdict: ISO 21925 is Not a Direct Substitute for EN 1366
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Fire Dampers: KEY TERMS AND CONCEPTS TO KNOW
What is the main purpose of a fire damper in an HVAC system?
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ISO 21925 AND EN 1366: WHICH STANDARD IS MORE WIDELY USED?
An overview of ISO 21925 and EN 1366
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WHAT SETS THE QUALITY OF STARDUCT AIR OUTLETS APART
WATCH THE DETAILS: https://www.youtube.com/watch?v=cafHP5Ax-7k
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STARDUCT , The 20th Years Anniversary
Twenty years on the road, driven from the start by the dream of one day becoming a true Star of Asia.
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VAV (Variable Air Volume) – Operating Principle
VAV (Variable Air Volume) – Operating Principle
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Comparison Between VAV and CAV Systems
Comparison Between VAV and CAV Systems
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BLOOD DONATION DAY AT STAR ASIA COMPANY
The "PINK DROPS OF LOVE" blood donation day at Star Asia Company in 2024 was an event to encourage employees and the surrounding community to take part in voluntary blood donation.
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NOISE AND REDUCES NOISE METHODS
NOISE AND REDUCES NOISE METHODS
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SOME CONCEPTS IN SILENCERS AND NOISE REDUCTION
Technical terms to understand clearly and distinguish in silencer and acoustic louver products
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PERIODIC HEALTH CHECK-UPS AND FIRST AID TRAINING AT STAR ASIA
Health Check-up, Occupational Disease Screening and First Aid Training Programme for Star Asia Company Staff and Employees
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THE NHỔN - HANOI STATION METRO AND BẾN THÀNH-SUỐI TIÊN METRO PROJECTS
Two key urban railway projects in Hanoi and Ho Chi Minh City
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SQUARE AIR OUTLET
Star Asia Technological Investment JSC (NSCA) has always pioneered the research and development of advanced technology products, delivering effective solutions for life and work.
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MAY, WHEN THE FLAME TREES BLOOM
THE MONTH CELEBRATING THE FOUNDING OF STAR ASIA
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CONINCO 45TH ANNIVERSARY CELEBRATION
The celebration of the Company's 45th anniversary marks the sustainable development and a solid future for CONINCO.
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GOLD-PLATED AIR OUTLETS
Now with new technology. NSCA's gold-plated air outlets can carry a lifetime warranty.
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DURABLE - GOOD - LOW PRICE
The standout differences of the one-piece pressed diffuser
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CHRISTMAS AT STAR ASIA
Christmas 2024 has arrived, and the festive atmosphere has begun to spread everywhere, including the working atmosphere at the company. NSCA employees are excitedly welcoming a warm and meaningful Christmas holiday.
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THE MESSAGE OF THE ARROWS
The logo of STAR ASIA Company is inspired by 4 arrow wings converging to form a sparkling four-pointed star, symbolising the 4 directions coming together, which are also the 4 groups of messages that STAR ASIA wishes to convey.
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Large-size 2200x800 EI120 fire-resistant insulated duct; FD 5-in-1 EI120 insulated fire damper, size 1200x800xL210
NSCA successfully tests EI120 ductwork and a new-design FD EI120 fire damper
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MARKING NATIONAL FIRE PROTECTION DAY 04/10
NSCA launches a completely new range of FIRE DAMPERS, with an optimized, reliable, compact and lightweight design and a more competitive price.
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FIRST BATCH OF CABLE LADDERS SHIPPED TO THE DUNG QUẤT STEEL PRODUCTION COMPLEX PROJECT - HÒA PHÁT
A batch of cable ladders shipped to the Dung Quất - Hoà Phát steel production complex project, out of a total of 1900 tonnes for the entire project.
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PINK DROPS OF LOVE 2023
“Every drop of blood given, a life that stays”
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HÒA PHÁT DUNG QUẤT 2 IRON AND STEEL PRODUCTION COMPLEX
Congratulations to distributor IMP on winning the tender package for 407 kilometres of Starduct-brand cable ladder and cable tray, weighing nearly 2000 tonnes of ZAM K27 steel, fully replacing post-fabrication hot-dip galvanized products at the Dung Quất 2 steel smelting and rolling complex, Hoà Phát Phase 2.
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THE IMPORTANT DIFFERENCES BETWEEN FIRE DAMPERS AND SMOKE DAMPERS
By compartmentalising fire, passive fire protection systems can: - Increase the effectiveness of active fire protection systems Ÿ Create favourable conditions for the evacuation of people - Protect property - Minimise damage
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THE HARMFUL EFFECTS OF SMOKE IN FIRES
By LARRY FELKER, Belimo Americas, Reno NV Everyone knows that inhaling smoke can be fatal, but the long-term effects on survivors can also be devastating and physically irreversible.
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FIRE DAMPERS: The Core of Fire Protection Design
Automatically closing fire/smoke dampers and fans in HVAC systems are effective in preventing the spread of smoke, fire and heat in the event of a fire. Article by VICKIE LOVELL INTERCODE INC., DELRAY BEACH, FLA.
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AN NSCA INVENTION GRANTED A FIRE PROTECTION INSPECTION CERTIFICATE
A product protected by an NSCA exclusive invention patent has passed testing and been granted an Inspection Certificate
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NSCA EXPORTS ITS FIRST SHIPMENT OF VAV BOXES TO THE US MARKET
The VAV box is a high-tech product in HVAC systems. NSCA has successfully manufactured this product and exported it for the first time to the most demanding market in the world!
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ALL STARDUCT FIRE DAMPER PRODUCTS GRANTED FIRE PROTECTION INSPECTION CERTIFICATES
All fire damper products manufactured by NSCA have been granted inspection certificates by the Fire Prevention, Firefighting and Rescue Police Department, Ministry of Public Security (C07), in accordance with Decree 136
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ZAM - THE COATING OF THE 21ST CENTURY
The self-healing ability of Nippon Steel's ZAM material at punched-hole edges
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NSCA AFFIRMS ITS CAPABILITY AND REPUTATION
NSCA is the first company to be granted Representative Sample Certificates for all of its fire damper lines (E and EI)
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UNBLOCKING THE FLOW
NSCA is the first fire damper manufacturer to be granted a representative-sample inspection certificate under QCVN 03:2021/BCA, and the only manufacturer able to supply EI120 dampers to the Vietnamese market
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NSCA SETS A NEW PEAK IN INSULATED FIRE DAMPER TESTING
On 15/09/2022, NSCA set a new record in insulated fire damper testing with a single-body damper measuring W2000 x H1000 x L600
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AMCA ASIA MEETING IN HCMC, VIETNAM
The Asia regional meeting of the Air Movement and Control Association International (AMCA International), held in Ho Chi Minh City on 14/09/2022, was a great success!
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NSCA Successfully Tests CORRIDOR DAMPER, INSTALLED WITHIN THE FIRE COMPARTMENT, L300, EI90 Rating
A vertical-shaft corridor damper installed within the fire compartment. With a length (L) of 300, the damper is suitable for connection to corridor branches off the vertical shaft, at an ON-WALL, WITHIN-THE-FIRE-COMPARTMENT installation position.
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Successful EI90 test of the torsion-spring fusible-link EI damper
On 22/8/2022, NSCA successfully tested its torsion-spring fusible-link damper, an invention exclusively protected for NSCA. The product passed the test at insulated fire-resistance class EI90.
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International Fair on Fire Protection Equipment
Specialized fire protection trade fair
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Turning a Product's Weaknesses into a New Invention
An NSCA product protected by an exclusive invention patent
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THE WORLD'S FIRST CABLE LADDER FINISHING MACHINE
Cable ladder with no welded joints and no bolts joining the rungs
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