Water quality monitoring, treatment and BSRIA compliance for heating and chilled water circuits.
Closed systems, including LTHW (low temperature hot water) heating circuits and CHW (chilled water) systems, require proper water treatment to prevent corrosion, scale formation and microbiological growth. Poorly maintained closed systems suffer reduced efficiency, component failures and shortened equipment life.
BSRIA BG50 and BG29 provide the industry guidance on achieving and maintaining appropriate water quality in closed systems. Meeting these standards protects your investment and demonstrates compliance.
Why it matters
Closed system water quality is often overlooked until something goes wrong. Corrosion damages components and shortens equipment life. Scale reduces heat transfer efficiency. Microbiological growth causes blockages and foul odours. Dissolved oxygen ingress accelerates deterioration.
Proper treatment and monitoring prevents these issues, reduces energy consumption and avoids costly plant failures.
What We Do
Initial system assessment and baseline sampling
Chemical treatment programme design
Inhibitor dosing and maintenance
Routine water quality monitoring
System flushing and cleaning where required
Annual BSRIA compliance sampling
Results interpretation and recommendations
Ongoing consultancy and support
A complete closed systems service
Covering assessment, treatment, monitoring and ongoing compliance
BSRIA Sampling & Analysis
Our BSRIA-compliant sampling covers the parameters specified in BG50, including:
- pH and conductivity
- Dissolved oxygen
- Inhibitor concentration
- Total dissolved solids
- Bacteria counts (TVC, Pseudomonas)
- System contaminants (iron, copper, suspended solids)
Results are interpreted by our in-house scientists. We explain what the numbers mean, identify trends and advise on any actions required.
Systems We Cover
- LTHW (low temperature hot water) heating systemsy
- CHW (chilled water) systems
- Mixed-use closed loop systems
- Underfloor heating circuits
- Heat pump circuits
- District heating connections
Common Issues We Find
- Systems with no treatment or monitoring programme
- Inhibitor levels below recommended concentrations
- Signs of corrosion or scale on system components
- Dirty water indicating system contamination
- No baseline water quality data
- Historic contamination from poor commissioning
- Oxygen ingress causing accelerated corrosion
A well-managed closed system
- Baseline water quality data from commissioning or takeover
- A documented treatment programme
- Regular sampling at appropriate intervals
- Inhibitor levels maintained within target range
- Clean water with no visible contamination
- Records that demonstrate BSRIA compliance
All Legionella & Water Hygiene Services
Legionella Risk Assessments
Cleaning & Disinfection Services
Legionella Monitoring & Maintenance
Cooling Tower Treatment
