EC Fan Upgrades & Retrofits
Lower energy use
and better reliability.
01256 518170EC fan retrofits improve efficiency, reliability, and control without full unit replacement.
EC Fan Upgrades & Retrofits
Lower energy use
and better reliability.
EC fan retrofits upgrade existing AHU fan systems to improve efficiency, reliability, and control without full unit replacement, reducing energy use and carbon output.
01256 51817040+
Yrs ExperienceYears Experience
Nationwide
Coverage
All Makes
Covered
Trusted by leading organisations
What the upgrade delivers
Why Upgrade
to EC Fans
Lower Energy Use
Higher efficiency EC motors reduce energy consumption. Savings can be modelled against existing systems before upgrade.
Higher Reliability
No belts or pulleys. Fewer moving parts means fewer failures and lower maintenance.
Better Control
Direct BMS or 0–10V control gives accurate speed adjustment and improved part-load efficiency.
Longer Asset Life
Retrofit EC upgrades extend AHU life without replacing the full unit or casing.
Redundancy
Dual fan configurations available where system requirements demand a backup option.
EC vs AC
How EC Technology Compares
AC
EC
Energy efficiency
Low maintenance
Variable speed control
BMS integration
Built-in diagnostics
Lower running costs
Typical Energy Use
100%
AC Fan
~60%
EC Upgrade
Typical savings based on continuously operated commercial AHUs.
How it works
From initial appointment to
restored operations
Discuss your requirements
Talk through your system setup, existing fan types, and targets. We confirm feasibility and what an upgrade could deliver before any site visit.
- Feasibility confirmed upfront
- Energy saving potential discussed
- No commitment required
Site survey
We visit site to audit your existing fan sets, record motor type and current power draw, and produce an energy model with projected savings and payback assessment.
- Motor type and consumption recorded
- Energy model produced
- Recommendations from our engineers
Fan selection
EC fans are selected to match the existing airflow duty, static pressure, and speed range. Controls integration is specified at the same time.
- Matched to existing duty
- Ziehl-Abegg, ebm-papst, Systemair
- BMS interface specified
Installation
The existing fan and motor assembly is removed and the EC unit installed. Electrical supply, controls wiring, commissioning, and airflow verification all included.
- Existing fan set fully removed
- Electrical and controls wired
- Airflow and speed verified on completion
From the shop
EC Fans Available to Order
Units we supply for retrofit projects. Need help selecting the right fan for your system? Our engineers can advise before you order.
Our Projects
Work We've Delivered
EC retrofits across swimming pools, hospitals, and commercial buildings.
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.
Leisure / Swimming Pool · Dorset
EC Fan Retrofit, Swimming Pool AHU
Relevant if: Belt-driven fans in a pool hall or humid environment have failed or are near failure, Humidity and temperature control has been lost or is unreliable, You want to extend AHU life without a full casing replacement
Leisure / Swimming Pool · Dorset
EC Fan Retrofit, Swimming Pool AHU
Relevant if your project involves:
- Belt-driven fans in a pool hall or humid environment have failed or are near failure
- Humidity and temperature control has been lost or is unreliable
- You want to extend AHU life without a full casing replacement
Two Ziehl-Abegg GR561 EC fans installed within the existing casing after catastrophic belt-drive failure. Humidity and temperature control restored. Belt maintenance eliminated.
Get in touch
Get an Upgrade
Proposal
Tell us how many fan sets, the current motor type, and typical operating hours. We'll produce an energy model showing projected savings and payback before any commitment to works.
Upgrade proposal tailored to your system
All major AHU makes and configurations covered
Direct response, not a sales team
Call us directly
01256 518170Enquiry
Send us the AHU details - number of fans, motor type, and operating schedule. We'll respond with a practical energy model within 24 hours.
Common questions
Frequently Asked Questions
In the vast majority of cases, yes. EC plug fans can replace belt-drive or direct-drive AC fan sets in most AHU configurations. We confirm suitability at the audit stage before any commitment is made.
No. The retrofit upgrades the fan set within the existing AHU casing. The unit remains in place and the existing ductwork connections and services stay intact, which is what makes it a cost-effective alternative to full replacement.
EC motors are significantly more efficient than AC induction motors, particularly at part load. The actual saving depends on your current motor type and operating hours. We model this against your consumption before you commit to any works.
A single fan set replacement typically takes one day on site. Where multiple sets are being upgraded, we stagger works to keep ventilation running throughout, or complete during a planned shutdown.
We can connect to a manual potentiometer for simple speed control, or we supply a 0–10V wire that can be configured for BMS integration. BMS connection to be made by others.