HVAC & Closed Loop Water Treatment
Protect chilled water, hot water, campus distribution, and geothermal systems from corrosion, scale, and biological fouling with customized closed loop treatment programs.
Closed Loop Treatment That Protects Your Investment
Closed loop HVAC systems — chilled water, hot water, campus distribution, and geothermal circuits — are among the most capital-intensive assets in any commercial or industrial facility. Without a properly managed water treatment program, these systems are vulnerable to corrosion, scale buildup, and microbiological fouling that silently degrade performance and shorten equipment life.
RW Water Services designs and manages closed loop treatment programs tailored to your specific system metallurgy, operating conditions, and water quality. Our programs combine corrosion inhibitors, scale control chemistry, and biocides with regular service visits and water analysis to maintain optimal system conditions year-round.
From a single chilled water loop in a mid-rise office building to complex multi-loop systems in hospitals, universities, and geothermal installations, we deliver the chemistry, service, and documentation your facility needs to protect equipment, maintain efficiency, and satisfy insurance and compliance requirements.
Why Facilities Trust RW for Closed Loop Treatment
Corrosion Inhibitor Programs
Molybdate, nitrite, and azole-based inhibitor programs formulated for mixed metallurgy systems — protecting copper, steel, aluminum, and cast iron components simultaneously.
Scale & Deposit Control
Polymer and phosphonate chemistry to prevent mineral scale and particulate deposits that reduce heat transfer efficiency and restrict flow in coils and heat exchangers.
Microbiological Control
Oxidizing and non-oxidizing biocide programs to prevent biofilm formation, MIC (microbiologically influenced corrosion), and Legionella growth in closed loop systems.
Regular Water Analysis
Scheduled on-site water testing and laboratory analysis with trend tracking, inhibitor residual verification, and written service reports after every visit.
System Flushing & Cleaning
Chemical cleaning and flushing programs to remove existing deposits, corrosion products, and biofilm before establishing a new treatment program.
Compliance Documentation
Detailed service logs, water analysis records, and treatment program documentation to satisfy insurance carriers, building owners, and regulatory requirements.
Closed Loop Services We Provide
Chilled Water System Treatment
Corrosion inhibitor and biocide programs for chilled water loops serving air handling units, fan coil units, and process cooling equipment.
Hot Water System Treatment
Scale and corrosion control programs for heating hot water loops, including high-temperature systems and radiant heating circuits.
Campus Distribution System Treatment
Water treatment programs for large-scale campus chilled water and heating hot water distribution loops serving multiple buildings, addressing the unique challenges of high-volume, interconnected systems.
Geothermal System Treatment
Specialized closed loop treatment for geothermal heating and cooling systems, including ground-source heat pump circuits where maintaining fluid chemistry is critical to heat exchanger performance and equipment longevity.
Fluid Cooler Treatment
Treatment programs for fluid cooler circuits, addressing the unique challenges of higher-temperature closed loop operation.
System Startup & Passivation
New system passivation programs that establish a protective oxide layer on metal surfaces before full operation begins, preventing early-stage corrosion.
Chemical Cleaning & Flushing
Targeted chemical cleaning programs to remove scale, corrosion products, and biofilm from existing systems prior to treatment program establishment.
Inhibitor Monitoring & Adjustment
Ongoing inhibitor residual testing and chemical feed adjustments to maintain optimal protection levels as system conditions change seasonally.
Protect Your HVAC Systems with a Proven Treatment Program
Our water treatment specialists will evaluate your closed loop systems and design a program that prevents corrosion, maintains efficiency, and extends equipment life.