AHSR™ System Assessment
An on-site technical evaluation to determine what is actually wrong with your heating system, whether recovery is viable, and what it will cost before any remediation work begins.
Book an AHSR Assessment
The assessment is £290 + VAT, payable prior to attendance. If remediation proceeds, this fee is deducted from the final cost. We will confirm suitability before you book.
What happens next:
We carry out an on-site technical assessment of your heating system
We tell you honestly whether remediation is viable and what it would cost
You decide what to do next. No pressure, no obligation to proceed.
From 14+ ratings
From 14+ ratings
What happens next:
We carry out an on-site technical assessment of your heating system
We tell you honestly whether remediation is viable and what it would cost
You decide what to do next. No pressure, no obligation to proceed.
How it works
Assessment first. Remediation only if appropriate.
Every AHSR engagement begins with a dedicated system assessment. No remediation work is undertaken without it.
On-site system assessment (£290 + VAT)
We visit and carry out a full technical evaluation: checking flow at each radiator, temperature differentials, water condition, and circulation behaviour. The assessment fee is deducted from the remediation cost if work proceeds.
We tell you what we found and what we recommend
Following the assessment, we provide a clear verdict. If remediation is viable, we agree a defined scope and cost before any work begins. If another route is the correct answer, we document that finding clearly.
Work proceeds only if recovery is confirmed viable
Where remediation is appropriate and you choose to proceed, we carry out the work and verify the result. The £290 assessment fee is deducted from the final cost. No surprises, no speculative intervention.
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.
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.
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.
Common Questions