From server heat dissipation in data centers and artifact preservation in museums to precision measurement environments in laboratories, the design quality of temperature and humidity control systems directly impacts equipment lifespan, product quality, and the safety of cultural artifacts. Based on ASHRAE standards and extensive engineering experience, we tailor optimal precision climate control solutions for every specialized facility.

Design Process

  1. Environmental Control Requirements Analysis — Define target temperature range, allowable tolerances (e.g., +/-0.5 degrees C or +/-0.1 degrees C), relative humidity range, and control precision as core system design parameters.
  2. Sensible & Latent Load Calculation — Analyze internal heat sources (equipment, lighting, occupants) and external loads (outdoor air infiltration, building envelope heat transfer) to calculate sensible and latent heat loads.
  3. System Type Selection — Based on load characteristics, select precision air conditioning units, chilled water systems, or direct expansion systems, and plan humidification and dehumidification methods.
  4. Control System Design — Select high-precision temperature and humidity sensors, design PID control loops, and plan multi-stage cooling and reheat control logic to ensure control stability[1].
  5. Redundancy Planning — Based on facility criticality, plan N+1 or 2N redundancy to ensure environmental conditions are maintained even in the event of equipment failure.
  6. Commissioning & Acceptance — Conduct continuous operation testing to verify temperature and humidity control precision and system response time across all zones, confirming compliance with design specifications.

Technical Standards & Specifications

  • ASHRAE Standard 55 — Thermal comfort conditions standard that defines acceptable indoor temperature and humidity ranges, providing the benchmark for environmental control design in office and residential spaces[1].
  • ASHRAE Standard 62.1 — Ventilation and indoor air quality standard ensuring that outdoor air supply in climate-controlled spaces meets hygiene requirements[2].
  • ASHRAE Handbook—HVAC Applications — Chapter 19 (Clean Spaces) and Chapter 24 (Museums, Galleries, Archives, and Libraries) provide environmental control design guidelines for specialized facilities[3].

Core Design Considerations

Engineering Challenges of Temperature Control Precision

Improving temperature control precision from +/-1 degrees C to +/-0.5 degrees C can multiply system complexity and cost several times over. Achieving +/-0.1 degrees C precision requires a secondary cooling system combined with precision reheat control. The key lies in properly evaluating actual requirements to avoid over-specification. The recommended server inlet temperature range is 18-27 degrees C[4], while museum collection spaces typically require 22 +/- 1 degrees C and 55 +/- 5% RH[3].

Dehumidification & Humidification Strategies

Located in a subtropical climate, Taiwan's outdoor air carries high moisture content, making dehumidification a core challenge for precision climate control systems. While cooling dehumidification followed by reheat can precisely control dew point temperature, it increases energy consumption. We employ strategies such as total heat exchangers for outdoor air pretreatment and desiccant wheel dehumidifiers for high latent heat loads, balancing control precision with energy efficiency. In winter or dry conditions, humidification equipment is required, with electrode, infrared, or ultrasonic humidifiers selected based on space characteristics.

Airflow Organization & Temperature Uniformity

Airflow organization design in climate-controlled spaces must not only ensure sufficient air change rates but also prevent supply airflow from directly impinging on sensitive areas while maintaining temperature uniformity across all points within the space. Underfloor supply with overhead return airflow patterns typically achieve superior temperature stratification control.

Our Advantages

Precision climate control is one of the most demanding areas in HVAC engineering. Even minor control deviations can lead to artifact deterioration, precision measurement errors, or server overheating shutdowns. Our team has accumulated extensive design experience in data centers, testing laboratories, precision manufacturing facilities, and other domains. With deep understanding of the environmental control requirements and engineering details for each type of facility, we deliver technically rigorous and economically sound design solutions.

Typical Applications

Data Centers & Telecom Equipment Rooms

Environmental control in modern data centers is critical not only for equipment longevity but also directly affects computing performance and energy costs. According to the ASHRAE TC 9.9 Thermal Guidelines for Data Processing Environments, the recommended server room environment temperature range is 18-27 degrees C with 20-80% relative humidity. We employ hot/cold aisle containment strategies with precision air conditioning units to achieve precise temperature zone control. For high-density racks (over 10kW per rack), we design in-row cooling or liquid cooling supplementary solutions to prevent localized hot spots from affecting equipment performance.

Museums & Collection Storage

Artifact preservation demands extremely stringent environmental conditions. Following recommendations from the International Council of Museums (ICOM) and the ASHRAE Handbook—HVAC Applications museum chapter, collection storage temperatures should be maintained at 20 +/- 1 degrees C with relative humidity controlled at 50 +/- 3% RH, while avoiding sudden temperature and humidity fluctuations — relative humidity changes within any 24-hour period should not exceed +/- 5% RH. We employ dedicated precision climate control systems with high-precision sensors and PID control algorithms to ensure long-term environmental stability.

Laboratories & Metrology Rooms

Precision metrology laboratories (such as CMM coordinate measurement rooms and optical inspection rooms) typically require temperature stability of 20 +/- 0.5 degrees C or even +/- 0.1 degrees C. This level of temperature control precision requires specialized system design: multi-stage cooling and reheat control, ultra-low velocity supply air (to avoid disturbing measurement instruments), and thorough temperature uniformity planning. We have accumulated extensive practical experience in precision laboratory HVAC design and can provide the most appropriate environmental control solutions for various measurement requirements.

Control Strategies

The control strategy of a precision climate control system is the key determinant of system precision and energy efficiency. We employ cascade PID control architecture, with the outer loop controlling room temperature and humidity and the inner loop controlling chilled water valve position and humidifier output, achieving fast response and high-precision control. For applications requiring even higher precision, we introduce feedforward control strategies that preemptively adjust HVAC output based on outdoor air conditions and indoor load changes, further reducing steady-state recovery time.