IAQ News

How Obstructed HVAC Coils Affect Facility Performance

In commercial and institutional facilities, the seamless operation of HVAC systems is pivotal for maintaining a comfortable and productive environment. WTI Pure Air has encountered a recurring issue that significantly influences system efficiency – obstructed HVAC coils. In this article, we will delve into the consequences of obstructed HVAC coils and present recommendations grounded in current guidance to address these issues. The Domino Effect of Obstructed HVAC Coils: Within the complex web of HVAC components, the coils play a critical role in facilitating efficient heat exchange. When these coils become obstructed by debris or contaminants, the repercussions can permeate throughout the entire system. Reduced heat exchange efficiency leads to escalated energy consumption, increased utility costs, and an overall compromised HVAC performance. Effects on HVAC System Operation:
  1. Diminished Cooling Capacity: Obstructed coils hinder the heat exchange process, resulting in a decline in the system's cooling capacity. This can lead to insufficient cooling, causing discomfort for occupants and potential harm to sensitive equipment.
  2. Elevated Energy Consumption: Inefficiencies caused by obstructed coils force the HVAC system to exert more ...

A Quick Guide to Chilled Water Coil Replacement

In the world of HVAC systems, the chilled water coil plays a crucial role in maintaining efficient and reliable operation. Over time, however, these coils may exhibit signs of wear and tear, necessitating replacement for optimal performance. In this article, we will explore the criteria that qualify an evaporator coil for replacement. Finally, we will provide a detailed insight into the design and construction aspects of the chilled water coil replacement process. Criteria for Chilled Water Coil Replacement
  • Corrosion and Rust: Evaluate the coil for corrosion and rust, as these can significantly impair heat transfer efficiency.
  • Plumbing/Water Leaks: Identify any signs of refrigerant leaks, as these can compromise system performance and pose environmental concerns.
  • Reduced Heat Transfer: Measure the coil's heat transfer efficiency, considering factors such as dirt accumulation and scaling that may hinder the process.
  • Age and Wear: Consider the age of the coil and assess the overall wear and tear, as older coils may no longer meet the system's performance requirements.
  • Energy Efficiency: Examine the coil's energy efficiency, as newer models may offer improved ...

HVAC Restoration Saves Capital Budgets at University of Texas

HVAC Restoration saves $1 million dollars in capital budget at University of Texas, San Antonio with refurbishment of two air handler units (AHUs). Challenge: The University of Texas San Antonio (UTSA) faced ongoing maintenance issues with two large air handler units (AHUs): AHU 23 S-7 and AHU 24 S-8. After years of wear and tear, the AHUs started to severely deteriorate. Eventually, the axle that drives the blower wheel broke and needed to be replaced. Because of this, there was no airflow or ventilation being supplied in the UTSA Convocation Center. UTSA decided to restore the AHUs with the Higher Education Emergency Relief Fund (HEERF) provided by the Education Stabilization Fund (ESF) through the Coronavirus Aid, Relief, and Economic Security (CARES) Act. This presented a challenge because of the looming deadline to use the funds. From the time of the purchase order partnering with Grainger, WTI/Pure Air Control Services only had 30 days to order equipment (including fan arrays), mobilize, complete all work, and invoice the project. Solution: WTI/Pure Air Control Services came into this project with ...

Enhancing HVAC Systems with Fan Array Redundancy

In the realm of Heating, Ventilation, and Air Conditioning (HVAC) systems, efficiency, reliability, and operational resilience are paramount. One innovative solution that addresses these concerns is the implementation of HVAC fan array redundancy. This cutting-edge approach revolutionizes traditional HVAC designs, offering a host of benefits that not only enhance facility operations but also contribute to improved energy efficiency. Understanding Fan Array Redundancy: Fan wall redundancy involves the strategic integration of multiple smaller fans arranged in a wall configuration, rather than relying on a single large fan unit. This design introduces redundancy by distributing the workload across several fans, ensuring that the system can continue operating even if one or more fans experience issues. This concept borrows inspiration from the redundant systems found in critical infrastructure such as data centers and aerospace applications, where uninterrupted operation is non-negotiable. How it Works: The core principle behind fan wall redundancy lies in its ability to adapt to changing conditions and maintain optimal airflow. In a typical HVAC system, a failure in the main fan could result in a complete shutdown ...

Understanding Fiberglass Duct Board: Risks, Remediation, and Encapsulation

In institutional buildings, maintaining a healthy indoor environment is crucial for the well-being of occupants. One common component of HVAC systems, fiberglass duct board, has been widely used for its insulating properties. However, its composition raises concerns about potential health risks. In this article, we will delve into the risks associated with fiberglass duct board, the importance of encapsulation, and the process of safely conducting encapsulation to protect building occupants. The Risks of Fiberglass Duct Board Fiberglass duct board is constructed from glass fibers bonded with resins, forming a rigid board used for insulating HVAC ducts. While it effectively insulates against heat and sound, the material poses potential risks to building occupants if not properly managed. An HVAC Assessment is a key component to identify any concerns and create a remedial action plans. Below are some of the risks:
  1. Airborne Particles: Fiberglass particles can become airborne due to wear and tear, leading to respiratory irritation when inhaled. Prolonged exposure may contribute to respiratory issues, particularly for individuals with pre-existing conditions such as asthma.
  2. Skin Irritation: Direct ...

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