Practical HVAC Learning and Engineering Support

Learn HVAC through structured courses, articles, videos, and training, or get professional engineering support for HVAC design, review, documentation, and selected site assessment work.

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Created by a Malaysian Professional Technologist, certified iCxS, HRD Corp TTT certified trainer, and HVAC practitioner with over 10 years of field experience.

300+ HVAC Articles Published

30+ HVAC YouTube Videos

10+ Years HVAC Field Working Experience

MBOT Professional Technologist

Malaysia HRD-TTT Certified Trainer

ASHRAE Malaysia Certified Independent CxS

What Do You Need Help With?

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I Want to Learn HVAC

Build HVAC knowledge through online courses, membership, corporate training, mentorship, articles, and videos.

Explore Learning Paths
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I Want HVAC Engineering Support

Get support for HVAC advisory, project review, design documentation, troubleshooting, and selected site assessment work.

View Engineering Services

Explore Free HVAC Guides and Videos

Start with practical HVAC articles and videos covering air conditioning basics, chilled water systems, cooling load calculation, psychrometrics, duct design, troubleshooting, and energy efficiency.

Browse HVAC ArticlesWatch HVAC Videos
  • HVAC Basics
    For beginners who want to understand systems, components, and terminology.
  • Chilled Water Systems
    For engineers, facility teams, and contractors working with chillers, pumps, cooling towers, and CHW systems.
  • Cooling Load & Design
    For learners who want to understand load calculation, equipment sizing, and design workflow.
  • Psychrometrics & Air Side Systems
    For people learning humidity, air properties, AHU behavior, ductwork, and air distribution.
  • Troubleshooting & Field Lessons
    For people who want to understand real HVAC problems, site observations, and performance issues.

Learn HVAC Through the Format That Fits You

Whether you want self-paced learning, company training, or personal guidance, the HVAC Learning Hub helps you choose the right path.

1
Online Courses

Self-paced HVAC courses for focused or continuous learning. Choose individual courses, Basic membership, or Pro membership depending on your goal.

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2
Corporate Training

Practical HVAC training for companies, contractors, facility teams, and technical departments in Malaysia, with HRD Corp claimable options where applicable.

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3
1-to-1 Mentorship

Personalized HVAC guidance for learners who want help with technical topics and questions, career direction, or project-related learning.

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Popular HVAC Courses

Structured courses designed to help you move from basic understanding to practical HVAC design knowledge.

  • HVAC Beginner Course
    Learn HVAC fundamentals, major systems, components, and practical terminology.
  • RTS Cooling Load Calculation
    Learn cooling load calculation using the Radiant Time Series method.
  • Psychrometric Analysis
    Understand humidity, air properties, psychrometric processes, and HVAC air treatment.
  • Duct Design
    Learn duct sizing, layout logic, airflow, pressure loss, and practical air distribution design.
  • Chilled Water System Design
    Learn chilled water system design, flow rate, equipment selection, system configuration, and design considerations.
View All Courses and Membership Options

Need HVAC Engineering Support?

For selected projects and enquiries, I provide practical HVAC advisory, design documentation, and Malaysia-based on-site assessment support.

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HVAC Advisory / Consultation

For second opinions, contractor quotation review, proposal review, layout questions, and technical advice.

HVAC Design & Documentation

For layout drawings, system sizing, duct routing, equipment selection, BQ, and preliminary design documents.

On-Site Assessment / Troubleshoot

For Malaysia-based site visits, logger installation, field assessment, troubleshooting, and practical system diagnosis.

Practical HVAC Knowledge Backed by Field Experience

My teaching is based not only on textbooks, but also on real HVAC work across design, installation, operation, maintenance, commissioning, troubleshooting, and system performance assessment.

close up of a modern metallic ventilation system
Site observation

Lessons from real HVAC installations, plant rooms, and system layouts.

exterior view of industrial air conditioning units
Design & coordination lessons

What engineers, contractors, and project teams should understand before installation.

aerial photography of brown concrete building
Troubleshooting Insights

Practical explanations of comfort complaints, performance issues, and system behavior.

close up view of an air duct labeled
Commissioning & performance checks

How HVAC systems are verified, tested, and reviewed in real projects.

Read Field Lessons and Case Studies

Corporate HVAC Training for Technical Teams

Train your engineers, technicians, facility teams, or project staff with practical HVAC topics tailored to your company’s needs. Training can be customized for beginners, design teams, facility teams, contractors, or project personnel.

Request Corporate Training
  • HVAC fundamentals
  • Chilled water systems
  • Cooling load calculation
  • Duct design basics
  • HVAC operation and maintenance
  • Testing, commissioning, and troubleshooting
  • Energy efficiency and system performance

Delivered by an HRD Corp TTT certified trainer with over 10 years of HVAC field experience.

Hi, I’m Yu Chang Zhen

Just call me Yu

I created aircondlounge to help people understand HVAC in a practical and structured way. My work combines education, technical writing, video teaching, online courses, corporate training, and selected field-based engineering support.

I am a MBOT registered Professional Technologist (Ts.), MASHRAE certified independent commissioning specialist (iCxS), and HRD Corp TTT certified trainer in Malaysia, with over 10 years of HVAC experience across design, installation, operation, maintenance, and commissioning.

Learn More About MeConnect on LinkedIn
About Me Section Real photo of me in front of KD BAUNG 1

Trusted by HVAC Learners & Customers Across Malaysia and Beyond

Start Learning HVACGet HVAC Engineering Support

  • This course cover almost all the fundamentals needed to design an air conditioning system.

    As Fresh Graduate who started as HVAC Design Engineer, this course cover almost all the fundamentals needed to design an air conditioning system.
    Nur Al Faqih I. J.
    Participant of HVAC Beginner Course

  • I will surely utilize this calculator and Mr. Yu’s teachings in future design projects.

    This course was very thorough and straight to the point. I will surely utilize this calculator and Mr. Yu’s teachings in future design projects. 
    Kenrick Mohammed
    Participant of RTS Cooling Load Calculation Course

  • I will use this engineer again on the next build.

    I had this guy across the world run my AC calcs for me. He did it all, did it well did it quickly. The charges were exactly right. I will use this engineer again on the next build.
    Larry Liascos
    Customer of HVAC Design Service

  • I was completely satisfied with his service and pricing.

    I asked Yu to design a mini split layout. He promptly responded with drawings and answered my trivial questions. I was completely satisfied with his service and pricing.
    Guy McSweeney
    Customer of HVAC Design Service

  • I can testify this course is the best regardless of your level.

    I have learned HVAC Courses in many different way. I can testify this course is the best regardless of your level. You will still find reading the details mentioned very helpful.
    Dia Ousmane
    Participant of HVAC Beginner Course

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