No matter how excellent the HVAC system design, if the project is awarded to a contractor lacking qualifications or sufficient professional capability, the final construction quality remains difficult to guarantee. As the concluding article in this series, this piece takes the building owner's perspective to analyze the complete process from design commissioning to construction bidding, and how to select the most suitable engineering team within the regulatory framework.

Why Do You Need an HVAC Professional Engineer? Series
  1. HVAC Professional Engineer vs. Technician: Professional Classification System
  2. Building Code Article 13 and Engineering Certification
  3. Central Air Conditioning System Selection Guide
  4. HVAC Project Bidding and Government Procurement (This Article)

1. Design-Build Separation: Professional Division of Labor

The best practice for large-scale HVAC projects is "design-build separation" — an independent engineering office or consulting firm handles design and construction supervision, while a construction company handles the installation[1]. The core values of this division include:

  • Design Independence: Designers are not influenced by construction interests and can make system selection and equipment specification decisions that best serve the owner
  • Supervision Objectivity: The designer also serves as construction supervisor, monitoring construction quality from a third-party perspective
  • Clear Accountability: Design issues are the designer's responsibility, construction issues are the contractor's responsibility, avoiding ambiguous accountability

2. Statutory Requirements for Contractor Qualifications

Under the Refrigeration and Air Conditioning Industry Management Act[2], contractors undertaking HVAC projects must have legitimate business registration. Building owners should clearly specify in bidding documents:

  • Refrigeration and Air Conditioning Industry Registration Certificate (Class A / B / C, depending on project scale)
  • Business Registration Certificate
  • Certification credentials of key technical personnel (Professional Engineer or Technician)
  • Track record of similar completed projects
  • Financial stability documentation (credit reports or financial statements)

3. Government Procurement Act Applicability

When HVAC projects are public works administered by government agencies, they must follow the procedures of the Government Procurement Act[3]. Projects are classified by amount:

  • Mega procurements (NT$200 million and above): Must be published in the Government Procurement Gazette and announced online
  • Above audit threshold (NT$50 million and above): Must be reviewed by the supervising authority
  • Above announcement threshold (NT$1 million and above): Must be publicly tendered online
  • Below announcement threshold: May be handled per agency internal regulations

Evaluation Methods

Large HVAC projects often use "Most Advantageous Tender" rather than "Lowest Tender." Evaluation criteria typically include: technical capability (40–50%), price (20–30%), past track record (15–20%), and schedule planning (5–10%). This evaluation method prevents quality issues caused by low-price bidding[4].

4. Evaluation Committee System

Under Article 94 of the Government Procurement Act, agencies must establish an evaluation committee when conducting Most Advantageous Tender evaluations. Refrigeration and air conditioning professional engineers, as specialists in the field, are frequently invited to serve as evaluation committee members for government procurement cases, providing professional opinions on technical aspects[5]. The professional judgment of evaluation committee members directly affects engineering quality, representing another important role of the professional engineer system in public works quality management.

5. Procurement Recommendations for Private Sector Owners

Although private enterprise HVAC projects are not subject to the Government Procurement Act, they can still benefit from its principles:

  • Design First, Then Bid: Complete professional engineer design and engineering specifications before bidding, rather than letting construction contractors design on their own
  • Multiple Quotations: Invite at least three qualified contractors to submit quotations to ensure price reasonableness
  • Technical Evaluation Priority: Do not use lowest price as the sole criterion — incorporate technical capability, track record, and service quality into the evaluation
  • Contract Protection: Clearly specify warranty periods, performance bonds, defect liability, and penalty clauses
  • Independent Supervision: Engage the design engineer to perform construction supervision, ensuring construction quality meets design intent

Conclusion

From professional classification systems, engineer certification, system selection, to project procurement — this four-article series attempts to comprehensively present the professional framework for HVAC projects from planning to construction. HVAC system quality depends not only on equipment quality but also on design rationality, process standardization, and supervision rigor. Selecting a qualified refrigeration and air conditioning professional engineer as a consultant is the building owner's most fundamental guarantee for ensuring engineering quality.