HVAC Water System Monitoring for Facilities Managers

30th January 2025

What to Monitor and Why

Monitoring HVAC water treatment systems is essential for Facilities Managers (FMs) aiming to maintain optimal performance and longevity of their heating, ventilation, and air conditioning (HVAC) systems. Effective monitoring helps prevent issues such as corrosion, scaling, and microbial growth, which can lead to inefficiencies and increased operational costs.

The Importance of Real-Time Monitoring

Advancements in real-time monitoring technology have transformed HVAC water treatment by providing continuous insights into system health. This proactive approach enables FMs to implement preventive measures, reducing the risk of unexpected failures and extending the lifespan of HVAC assets. According to the Building Services Research and Information Association (BSRIA), real-time monitoring is now considered industry best practice for managing closed heating and cooling systems.

Applications of Real-Time Monitoring

  1. Pre-Commission Cleaning: Continuous monitoring during this phase reduces uncertainty at handover and increases accountability, as issues can be pinpointed to a specific time.
  2. One-Off Health Checks: Temporary installation of monitoring technology allows for comprehensive system assessments over periods ranging from two weeks to several months. Instantaneous access to critical data ensures systems return to stable conditions promptly.
  3. Ongoing Maintenance: Long-term monitoring solutions facilitate proactive maintenance strategies, enabling FMs to address potential issues before they escalate.

Informing Water Treatment Decisions with Real-Time Data

Access to real-time data allows FMs to make informed decisions regarding water treatment, tailoring interventions to the specific needs of the system. This targeted approach prevents unnecessary procedures, such as routine flushing, which can cause damage and degradation. Instead, sustainable methods like side-stream filtration and non-chemical treatments can be employed, reducing chemical and water usage.

Key Parameters to Monitor

Monitoring the following parameters is crucial for maintaining water quality and system efficiency:

  • Dissolved Oxygen (DO): High levels of DO can lead to corrosion. Monitoring helps in taking corrective actions before damage occurs.
  • Pressure: Ensures the system is airtight, preventing oxygen ingress, which is particularly important after activities like flushing.
  • pH Levels: Deviations in pH can indicate water chemistry issues that may lead to corrosion or scaling.
  • Temperature: Maintaining optimal temperatures is essential for system efficiency and can influence corrosion rates.
  • Corrosion Rates: Measuring corrosion rates helps in assessing the effectiveness of inhibitors and overall system health.
  • Inhibitor/Glycol Concentration: Monitoring chemical concentrations ensures they remain within optimal ranges, reducing wastage and costs.
  • Microbial Activity: Detecting microbial growth early prevents biofilm formation, which can impede system performance and lead to health risks.

Benefits of Proactive Monitoring

Implementing a comprehensive monitoring strategy offers several advantages:

  • Energy Efficiency: Proper water treatment and monitoring can prevent issues that cause HVAC systems to consume up to 40% more energy.
     Heating and Ventilating
  • Cost Savings: Early detection of issues reduces repair costs and prevents costly downtime.
  • Extended Equipment Lifespan: Maintaining optimal water quality minimises wear and tear, prolonging the life of HVAC components.
  • Sustainability: Efficient water treatment practices contribute to water and energy conservation, aligning with environmental goals.

By embracing real-time monitoring and proactive water treatment strategies, Facilities Managers can ensure their HVAC systems operate efficiently, sustainably, and cost-effectively.

Contact our team of experts today to learn more about our water treatment solutions for plumbing and HVAC contractors.

FAQs

What is the role of dissolved oxygen in HVAC water systems?

Dissolved oxygen can lead to corrosion in HVAC water systems. Monitoring DO levels helps in implementing corrective measures before significant damage occurs.

How does real-time monitoring improve HVAC system maintenance?

Real-time monitoring provides continuous data on system parameters, enabling proactive maintenance and timely interventions, which prevent major repairs and breakdowns, reduce operational costs and minimise unplanned callouts.

What are the benefits of using non-chemical water treatment methods?

Non-chemical treatments, such as side-stream filtration, are less invasive, reduce chemical usage, and are more sustainable, minimising environmental impact.

Why is pH level monitoring important in HVAC water treatment?

pH levels affect the solubility of minerals and the effectiveness of corrosion inhibitors. Monitoring pH helps maintain water chemistry within optimal ranges, preventing scaling and corrosion.

How does microbial activity affect HVAC systems?

Microbial growth can lead to biofilm formation, which reduces heat transfer efficiency, clogs systems, and can cause microbiologically influenced corrosion (MIC). Early detection through monitoring is crucial.