AHU Refurbishment
Restore & extend
your air handling units.
01256 518170Extend your AHU's life by 10–20+ years at around 40% of full replacement cost.
AHU Refurbishment
Restore & extend
your air handling units.
Extend your AHU's life by 10–20+ years at around 40% of full replacement cost. BVS survey, specify, and refurbish on-site with minimum disruption to your operations.
01256 51817040+
Yrs ExperienceYears Experience
All Manufacturers
Covered
UK Wide
Coverage
Trusted by leading organisations
Common indicators
Signs Your AHU Needs Attention
Reduced Efficiency
The unit is no longer delivering the airflow or temperature conditions required by the building design.
Failure to Meet Design Requirements
Changing building use, occupancy, or regulation means the existing unit configuration can no longer comply.
Excessive Noise
Worn bearings, degraded fan blades, or loose components cause operational noise that was not present originally.
Temperature Problems
Inconsistent heating or cooling across zones points to coil degradation, control failures, or heat exchanger fouling.
Corrosion from Water Ingress
Condensation or drainage issues cause internal corrosion affecting structural integrity and air quality.
Poor Indoor Air Quality
Filter bypass, damaged seals, or degraded heat recovery reduces ventilation effectiveness and IAQ compliance.
What it involves
What Is AHU Refurbishment?
AHU refurbishment is a precise process aimed at restoring optimal functionality and efficiency. It is a comprehensive process involving thorough inspection and strategic component upgrades, not a blanket overhaul.
Our engineers carry out a detailed assessment of every major component before any works are specified or authorised:
- Fans, coils, filters, and dampers
- Heat recovery and heat exchangers
- Unit corrosion and structural condition
- AHU controls and automation interfaces
- Access doors, panels, and seals
Only failed or degraded components are replaced. The structural frame, casing, and duct connections are retained wherever viable, keeping costs down and works in-situ.
40%
of replacement cost, typically
10–20+
additional years of asset life
40+
years of AHU experience
0
disruption preferred, phased works
Why refurbish
The Case for Refurbishment
In most cases the existing AHU casing and frame are structurally sound. A targeted refurbishment restores full performance, integrates modern efficiency improvements, and avoids the cost and disruption of full replacement.
Cost Effective
The cost to refurbish in-situ is typically around 40% of that of replacing with a new air handling unit, substantial capital savings.
Energy Saving Upgrades
Modern heat recovery controls and high-efficiency EC fans can be incorporated or retrofitted into the existing unit during refurbishment.
Industry Standard Compliant
Systems can be modified to meet current building requirements including HTM 03-01 for healthcare and Part L energy regulations.
Minimum Disruption
AHU refurbishment typically causes little or no disruption to client premises. Works are phased around operational requirements.
Extended Asset Life
This approach effectively extends the unit's working life by another 10–20+ years, deferring the capital cost of full replacement.
Enhanced Performance
Latest energy-efficient technology including direct drive plug fans and high-efficiency motors restores and improves original design performance.
Sectors
Industries We Serve
The process
Survey to Handover, Four Steps
Site Survey
On-site inspection by a BVS engineer confirms condition, refurbishment viability, and scope requirements, with an honest assessment.
Specification & Quote
Fixed, component-level scope produced and agreed before any works are authorised. No surprises.
Refurbishment Works
In-situ delivery by our engineers, phased to keep ventilation live where possible and programmed around your operations.
Test & Handover
Full commissioning, performance verification, and documentation package on completion.
Our Projects
Work We've Delivered
NHS trusts, shopping centres, hotels, entertainment venues, and production facilities.
Healthcare / NHS · Hammersmith, London
NHS Trust AHU Refurbishment, Live Facility
Relevant if: Your AHU is in a live clinical facility that stays operational during works, You need targeted component repair rather than full unit replacement, Reliability and indoor air quality cannot be compromised
Healthcare / NHS · Hammersmith, London
NHS Trust AHU Refurbishment, Live Facility
Relevant if your project involves:
- Your AHU is in a live clinical facility that stays operational during works
- You need targeted component repair rather than full unit replacement
- Reliability and indoor air quality cannot be compromised
Fan drives, filters, dampers, coil face, and bathroom extract fans overhauled. Operational life extended without full replacement or disruption to the trust.
Healthcare / Private · Bath
Operating Theatre AHU Refurbishment with EC Upgrade
Relevant if: Theatre or clinical-grade air quality standards are required throughout, Energy reduction is part of the refurbishment brief, Works must fit around a live clinical programme
Healthcare / Private · Bath
Operating Theatre AHU Refurbishment with EC Upgrade
Relevant if your project involves:
- Theatre or clinical-grade air quality standards are required throughout
- Energy reduction is part of the refurbishment brief
- Works must fit around a live clinical programme
Full internal refurbishment with EC supply and extract fans and a custom heat recovery exchanger. Energy reduced, theatre air quality maintained throughout.
Sport & Entertainment · O2 Arena, London
AHU Refurbishment, High-Footfall Venue
Relevant if: Your venue has limited maintenance windows between events or trading hours, Works must be programmed tightly around the operational calendar, Asset life extension is preferred over full unit replacement
Sport & Entertainment · O2 Arena, London
AHU Refurbishment, High-Footfall Venue
Relevant if your project involves:
- Your venue has limited maintenance windows between events or trading hours
- Works must be programmed tightly around the operational calendar
- Asset life extension is preferred over full unit replacement
Targeted internal refurbishment at the O2 Arena. Fan and filtration systems upgraded. Works coordinated around the venue's operational schedule.
Industrial / Food & Drink · UK
AHU Refurbishment, Active Production Facility
Relevant if: Your environment has specific temperature or humidity requirements tied to production, Shutdown windows need to be planned around a production schedule, The facility remains operational during the works
Industrial / Food & Drink · UK
AHU Refurbishment, Active Production Facility
Relevant if your project involves:
- Your environment has specific temperature or humidity requirements tied to production
- Shutdown windows need to be planned around a production schedule
- The facility remains operational during the works
AHU assessed, components replaced, and fully recommissioned at a working distillery. Planned around the production schedule with minimal process downtime.
Retail / Shopping Centre · Glasgow
Shopping Centre AHU Refurbishment & Gas Pipework
Relevant if: Your AHU serves a live retail or public environment that cannot close, Belt-driven fans are overdue for upgrading, Gas distribution infrastructure also needs a compliance review
Retail / Shopping Centre · Glasgow
Shopping Centre AHU Refurbishment & Gas Pipework
Relevant if your project involves:
- Your AHU serves a live retail or public environment that cannot close
- Belt-driven fans are overdue for upgrading
- Gas distribution infrastructure also needs a compliance review
Three weatherproof AHUs refurbished with EC fans and new direct-fired burners. Gas distribution replaced in 316 stainless steel. Shopping centre stayed open throughout.
Commercial Office · London
Full Internal Refurbishment, City Office AHU
Relevant if: Multiple internal components have reached end of life at the same time, Air volume requirements have changed since the original installation, You need a complete strip-out and recommission rather than piecemeal repair
Commercial Office · London
Full Internal Refurbishment, City Office AHU
Relevant if your project involves:
- Multiple internal components have reached end of life at the same time
- Air volume requirements have changed since the original installation
- You need a complete strip-out and recommission rather than piecemeal repair
All internal components replaced: frost coil, cooling coil, heating coil, filtration, and fan assembly. Rematched to revised air volumes and recommissioned.
Hotel / Leisure · Forest of Arden
Pool Hall AHU Troubleshooting & Survey, Marriott
Relevant if: Your pool hall AHU is failing to reach target temperature or humidity, The unit was recently installed or maintained but is still underperforming, You want an independent assessment before committing to replacement
Hotel / Leisure · Forest of Arden
Pool Hall AHU Troubleshooting & Survey, Marriott
Relevant if your project involves:
- Your pool hall AHU is failing to reach target temperature or humidity
- The unit was recently installed or maintained but is still underperforming
- You want an independent assessment before committing to replacement
AHU installed three years prior was only reaching 24°C against a 31°C target. Full survey identified ductwork leaks, diffuser inadequacy, and control issues. Rectification programme defined.
Get in touch
Ready to Restore
Your AHU?
Tell us the make, model, and the issue you're experiencing. We respond within one working day with a practical assessment.
- On-site condition survey by an experienced engineer
- Fixed-price, itemised scope, no surprises
- Works programmed around your operations
- No obligation to proceed
Call us directly
01256 518170Enquiry
We will aim to respond within 24 hours
Common questions
Frequently Asked Questions
Typically around 40% of a new unit. We provide a fixed-price, itemised quote after the survey. No commitment required before that.
This ranges from a few days to several weeks depending on the scope and size of the unit. We provide a clear programme at quotation stage.
Often not. Many refurbishments are staged so ventilation stays live. Where a shutdown is unavoidable, we programme it around your operational hours.
Typically 10–20+ years, confirmed at survey stage. If refurbishment isn't economically sound, we'll tell you honestly.
Yes. EC fan conversion, heat recovery, and controls integration can all be incorporated. Where the scope of works supports it, we work to HTM 03-01 benchmarks on healthcare sites. We'll confirm what's achievable at survey stage.
Regular filter changes and system inspections are essential to maintain the performance gains achieved during refurbishment.
When the structural frame is beyond economic repair. We assess this honestly: there is no incentive for us to favour one route over the other.
Further reading
When Does AHU Refurbishment Make More Sense Than Replacement?
Cost is only part of the picture. Structural life, compliance, energy targets, and programme constraints all factor into the decision.
Read more →The Hidden Cost of Delaying AHU Coil Replacement
A degraded coil loses performance gradually, long before it stops working. The cost shows up in energy bills and air quality first.
Read more →EC Fan Upgrades: What the Energy Savings Actually Look Like
Quoted savings range from 15% to 60% depending on the source. We break down what the numbers look like on a real commercial job.
Read more →