Advanced Heating System Remediation™
Assessment-led recovery for underperforming, restricted, and microbore central heating systems. AHSR™ is a specialist escalation-level service introduced where routine flushing, component replacement, and standard intervention have failed to restore proper circulation and heat transfer. Based in Scotland, with coverage across Northern England for specialist remediation cases. UK-wide enquiries are considered for complex systems by prior arrangement.
What is AHSR?
Remediation for systems that routine methods can't fix.
If your heating system has already been flushed, repaired, or had parts replaced and the problem persists, the issue is usually not the boiler. It's the system. AHSR is an assessment and remediation process designed to identify and resolve the underlying cause, not just the visible symptom.
Escalation-level, not routine
An assessment-led hydraulic recovery methodology introduced only when routine flushing and standard intervention have reached their practical limit.
Assessment before intervention
Without understanding flow behaviour, heat transfer performance, and contamination pathways, remedial work becomes speculative and often ineffective.
Opposite hydraulic envelope
Standard power flushing relies on high volume and velocity. AHSR operates in a controlled, targeted envelope.
Restores stable circulation
Addresses bonded, compacted, or embedded internal restriction where routine methods have failed.
Reduces repeated faults
AHSR targets the underlying system condition rather than just the symptoms, breaking the cycle of recurring faults and failed fixes.
Evidence-led clarity
Where recovery is viable, findings confirm it. Where it isn't, that's identified before any disruptive or irreversible work begins.
why preperation matters
Why system preparation matters more than the appliance
In many older properties, the cost and performance of a heating upgrade is not determined by the appliance itself.
The Hidden Factor
It's the system, not the appliance
A heat pump on a restricted or undersized system will not perform as intended. An electric boiler on the same system will work, but at significantly higher running cost. The appliance is rarely the deciding factor.
The Right Approach
Assess before you install
Before any installation is considered, the system must be assessed, understood, and prepared where necessary. This ensures correct appliance selection, predictable performance, and avoidance of unnecessary replacement work.
Where it applies
Where AHSR applies
AHSR is designed for systems where internal restriction is preventing proper circulation and heat transfer. This commonly includes:
Microbore pipework
Microbore pipework with embedded or compacted debris.
Radiator circuits
Radiator circuits with uneven or stalled flow.
Boiler heat exchangers
Boiler heat exchangers affected by magnetite or scale fouling.
Heat pump plate heat exchangers
Heat pump plate heat exchangers restricted on the water side.
Who Is It For?
Find the right starting point
AHSR serves three distinct groups. Select the one that fits your situation.
I'm a homeowner
Homeowners typically contact us after power flushing has already been carried out, radiators remain cold or slow to heat, circulation problems keep returning, or components have been replaced without improvement.
Take me thereI'm an engineer or trade professional
Engineers typically escalate when power flushing has already been carried out correctly, repeated component replacement has not resolved circulation issues, or microbore or high-restriction pipework is present.
Take me thereI'm a manufacturer, insurer, or surveyor
We provide independent, water-side system remediation support for manufacturers' technical teams, insurers, surveyors, and senior engineers. All work is assessment-led, manufacturer-safe, and returned with full professional documentation.
Take me thereBefore You Commit
System Flushing (All Methods) vs AHSR
What you've been told:
- Routine power flushing has already been carried out and made no lasting difference
- Cold radiators and slow circulation are symptoms of failed pipework, not internal restriction
- Replacement is the only remaining option and the work needs to start immediately
- The cost and disruption involved is unavoidable at this stage
- Heat exchanger fouling or internal system restriction has not been assessed before recommending replacement
What AHSR provides:
- An independent, assessment-led view of whether internal restriction is the actual cause rather than pipework failure
- A targeted hydraulic remediation methodology that operates where standard flushing cannot reach
- Confirmation of whether recovery is viable before any disruptive or irreversible work begins
- If replacement is genuinely the right answer, that finding is documented clearly so the decision is made on evidence, not assumption
- Identification of whether restriction exists within the system or critical components such as the boiler or heat pump heat exchanger
In many cases, AHSR identifies recoverable systems that would otherwise have been unnecessarily replaced.
Service Coverage
Where we carry out AHSR
AHSR is delivered as a specialist, escalation-level service for complex and unresolved heating system conditions. Based in Scotland, we operate across mainland Scotland and island locations, with extended coverage into Northern England for specialist remediation cases. UK-wide enquiries are considered by prior arrangement.
Travel considered for exceptional cases outside these areas.
Assessment & Pricing
What does AHSR cost?
All remediation work begins with professional assessment to determine whether recovery is technically viable. This may include systems affected by restricted boilers, plate heat exchangers, microbore circuits, or wider circulation-related contamination.
Initial Assessment
£290 + VAT
Payable prior to attendance. Deducted from the remediation cost if work proceeds.
- On-site technical assessment
- Evaluation of system configuration and overall condition
- Identification of circulation characteristics and internal restriction
- Determination of whether remediation or replacement is the correct technical route
- Full professional findings documented
Remediation Work
£950 – £3,500 + VAT
Where remediation is appropriate following assessment. Final cost agreed before work begins.
Pricing depends on:
- System size and overall complexity
- Degree and nature of restriction or contamination
- Presence of microbore pipework
- Access and circuit configuration
- Time required for controlled, verification-led recovery
- Whether targeted work is required on critical components such as boiler heat exchangers or heat pump plate heat exchangers
Systems with extensive microbore, complex zoning, multiple circuits, or typically 25+ radiators may fall outside this range and are assessed individually. Systems involving plate heat exchangers or heat pumps are priced separately See more.
What happens after the assessment?
Outcome 1
Remediation is viable
A defined remediation scope and cost are agreed before work proceeds. This may include targeted recovery of restricted heat exchangers where system conditions have affected performance.
Outcome 2
Partial or limited recovery is viable
Limitations and available options are clearly explained and documented.
Outcome 3
Recovery is not viable
Identified before disruption begins, avoiding unnecessary cost or invasive work.
Systems involving plate heat exchangers, particularly heat pumps, may require specialist assessment and dedicated recovery pricing. See our Heat Pump Plate Heat Exchanger Recovery page.
Need help with a heating system problem?
Useful resources
What is AHSR?
AHSR stands for Advanced Heating System Remediation. It is a proprietary, assessment-led methodology for recovering heating systems where power flushing has reached its limit. This explains what it is, how it works, who it is for, and what it costs.
AHSR for Engineers and Trades: When Standard Methods Stop Working
AHSR explained for engineers and trades: when to escalate, what it costs, how it differs from power flushing, and the three possible outcomes.
AHSR for Homeowners: When Standard Fixes Stop Working
Cold radiators after a power flush, faults that keep returning, or a recommendation to repipe — AHSR may be the step that was missed. Austin explains what the process involves, what it costs, and what the three possible outcomes are.