CEG are a Glasgow-based HVAC supply specialist with over 100 years of combined industry experience.
We supply natural ventilation solutions to M&E contractors and building services consultants across Scotland and the UK, covering NVUs, e-stack systems, hybrid ventilation, and intelligent controls.
Our team works alongside engineers and contractors from early specification through to delivery, offering technical support, product selection guidance, and honest lead time management at every stage.
To discuss a project or request a quote, call our team today on 0141 212 3388 or fill in our online enquiry form.
Natural Ventilation Units (NVU) Range
The NVU range is designed for ceiling-mounted fresh air delivery and extract in occupied buildings.
Each unit draws fresh air in through facade louvre panels and delivers it at low velocity into the breathing zone. Warm stale air is extracted through the unit itself.
NVUs are used across schools, offices, and public buildings as a low-energy alternative to fully mechanical ventilation systems.
NVU High Capacity Units
High capacity NVUs are designed for larger occupied spaces where standard units cannot meet the required ventilation rate. They deliver the same low-energy, low-noise performance as the standard range but at greater air volumes.
NVU with Integrated Heat Recovery
Where energy retention is a specification requirement, NVUs are available with integrated heat recovery.
Outgoing air transfers heat to the incoming fresh air supply, reducing the energy demand on the building’s heating system.
NVU for Displacement Ventilation
Displacement ventilation NVUs supply fresh air at low level, allowing it to rise naturally with heat from occupants and equipment before being extracted at high level.
Fresh air reaches occupants before mixing with stale air above, which improves air quality in the breathing zone.
Acoustic Performance and Noise Control
One of the primary reasons building services engineers specify NVUs over mechanical alternatives is noise. NVU units operate at low air velocities, producing significantly less noise than fan coil or ducted supply systems.
Each unit is rated for acoustic performance in occupied spaces.
The range includes configurations tested to meet the requirements of classrooms, open-plan offices, and other noise-sensitive environments.
e-Stack Ventilation Systems
e-Stack Ventilation Systems
e-Stack systems are designed to use the natural stack effect to extract stale air through roof or facade terminals.
Warm air rises and exits at high level, drawing fresh air in at low level to replace it. No mechanical energy is required in standard operating conditions.
We supply both roof-mounted and facade terminals to suit the building design.
Hybrid Ventilation Systems
Hybrid Ventilation Systems
Hybrid ventilation systems sit between fully mechanical systems and pure natural ventilation.
NVUs handle fresh air supply while e-Stack manages extract, forming a coordinated low energy solution that meets compliance and performance requirements without the energy demand of a full mechanical system.
A low energy fan assist is available for periods when natural stack pressure is insufficient.
It activates automatically and connects to the same intelligent control panel as the ventilation unit, switching back to natural mode when conditions allow.
No manual intervention from building management or facilities teams is required.
Mechanical assist is available when needed, but natural mode accounts for the majority of operating hours across a typical year. Running costs stay low without compromising occupant comfort, and the system responds to real conditions rather than fixed schedules.
Controls and Intelligent Systems
Controls and Intelligent Systems
The intelligent control systems CEG supply adjust airflow continuously based on what’s happening in the building.
CO₂ sensors detect rising occupancy and open dampers to increase fresh air supply. Temperature sensors track thermal conditions.
The system responds without manual input from facilities teams.
This is the difference between ventilation that runs on fixed schedules and ventilation that responds to real conditions.
Energy use falls as a result, because the system only works as hard as the building requires.
The modern intelligent panels support single-zone and multi-space configurations.
Our team works alongside the building services consultant from specification stage to confirm the correct configuration and compatibility before procurement.
Commercial Buildings and Sectors Suited to Natural Ventilation
With decades of experience supplying natural ventilation systems to buildings across Scotland, we understand which building types suit these systems and where the design needs careful consideration.
Our team advises on the right approach for each project from the first conversation.
Schools and Educational Facilities
Classrooms generate high CO₂ loads from concentrated occupancy. Poor air quality has a measurable effect on concentration and learning. NVUs deliver consistent fresh air without the mechanical noise of fan coil systems, and the range is rated for occupied space acoustic requirements.
We advise on product selection for school building types and work with the M&E contractors who handle installation and maintenance across Scotland.
Commercial Offices and Public Buildings
Commercial buildings with moderate occupancy and good ceiling heights suit hybrid ventilation well. NVUs supply fresh air at ceiling level. e-Stack terminals extract at roof level.
Together, they maintain air quality across open-plan layouts without the ductwork runs or noise of a conventional mechanical system.
Public buildings including libraries, community centres, and civic facilities specify natural ventilation for its low operating cost and reduced maintenance requirement. The environmental performance aligns with sustainability commitments now required on many Scottish public sector projects.
Residential and Housing Developments
e-Stack systems have a strong track record in residential buildings.
In social housing stock, long-term operating costs are a primary consideration, and stack effect extraction reduces the risk of condensation and mould without the energy cost of continuous mechanical extract fans.
Intelligent controls adjust to occupancy patterns and weather conditions rather than running on fixed schedules.
We supply e-Stack systems for housing developers and their M&E contractors across Scotland and the UK.
Why M&E Contractors and Architects Choose CEG
We are a leading supply specialist for natural ventilation solutions across the UK. Our role is product selection, specification support, and getting the right equipment to site on programme. We work alongside the teams who carry out the physical work, not in competition with them.
Partnership with Leading Manufacturers
Our manufacturer partnership gives M&E teams in Scotland direct access to a UK-based specialist with a strong track record in natural and hybrid ventilation.
The full range is available through our experts, from NVU units, e-Stack systems, hybrid configurations, and intelligent controls, including specialist configurations.
Where non-standard specifications arise, we work directly with the manufacturing team. We provide the technical comparison your engineer needs to make a decision, not just a product code and a lead time.
Technical Support from Survey to Delivery
Specification questions get a same-day response from someone with the technical background to answer them properly. No holding messages. No non-technical intermediaries passing information back and forth.
Our involvement begins at specification stage. We assess which system configuration suits the project, including louvre panel sizing, unit capacity, damper placement, and controls integration.
Lead times are managed honestly.
If a product is unavailable or under supply chain pressure, you find out immediately. We present alternatives with the technical comparison needed for a fast decision, not just a heads-up that there is a problem.
Our supply range also covers grilles, louvres, diffusers, air handling units, and fan coil units for projects where mechanical and natural ventilation sit alongside each other in the same specification.
Smoke and Natural Ventilation Applications
Some Scottish projects combine smoke ventilation and natural ventilation within the same building strategy. We work with building services consultants and M&E contractors to specify the correct product and supply the units alongside the louvre systems and dampers the installation team needs.
Constructionline Certified and Programme-Focused
We are Constructionline Certified, which supports procurement compliance for public sector frameworks and main contractor supply chains across Scotland.
On a live programme, a late delivery does not stay contained. It shifts the commissioning schedule and ripples across every trade that follows. We communicate proactively, flag issues before they become surprises, and keep the procurement side of the project moving.
Natural Ventilation System Questions
What is the difference between natural ventilation and hybrid ventilation?
Natural ventilation uses passive forces to move air through a building. Hybrid systems add a low-energy mechanical assist that activates automatically when those passive forces are insufficient to meet the required ventilation rate.
Do natural ventilation systems work effectively in Scotland?
Yes. Scotland’s cool ambient temperatures and prevailing westerly winds support natural ventilation well for most of the year, and hybrid systems cover the conditions where passive forces alone are not sufficient.
Can natural ventilation units connect to a building management system?
Yes. The intelligent control systems we supply are designed for BMS integration, with CO₂ sensor outputs, damper actuator signals, and system status data connecting to standard BMS protocols.
Do you carry out installation?
No, we are a supply specialist. Our role is to get the right products to site with full technical documentation to support the M&E contractors who install and commission the systems.
Do these systems suit both commercial buildings and residential properties?
Yes. The range covers commercial buildings including schools, offices, and public sector facilities, as well as residential applications through the e-Stack range for homes and housing developments.
How Natural Ventilation Delivers Fresh Air
Natural ventilation works on two forces: wind pressure and the stack effect.
Wind pressure pushes air through openings in the facade. The stack effect causes warm air to rise and exit at high level, drawing fresh air in below to replace it.
Both forces are passive. No fan energy is required under normal operating conditions.
Where natural pressure differentials fall short, hybrid systems step in. Fan assist activates automatically, maintaining the building’s ventilation rate regardless of the weather.
The product ranges CEG supply are engineered systems, not open windows.
Each system has defined free area, tested performance data, and integrated controls. Louvre panels, dampers, and extract terminals are sized and positioned to manage airflow through the occupied zones.
Correct specification at the design stage is what makes the system perform effectively.
Our team works alongside building services engineers to ensure each system is sized for the building’s occupancy profile and thermal loads.
Natural Ventilation and Louvre Systems: Specification and Selection
Getting the right system specified takes more than selecting a product from a catalogue.
The correct solution depends on the building’s form, orientation, occupancy profile, and the performance targets set by the building services engineer.
For most projects, the starting point is a review of the architectural drawings and building services specification. We assess room volumes, occupancy levels, and the available positions for intake louvre panels and extract terminals.
Where the design is at an early stage, we engage at a point that allows the natural ventilation strategy to be integrated properly into the building services design.
Once the system configuration is agreed, we provide a clear quotation with lead times for the NVU units, louvre systems, dampers, and any controls equipment required.
Our team manages the order through to delivery with updates at each stage.
Talk to Our Natural Ventilation Service Team Today
We supply natural ventilation solutions to M&E contractors, building services consultants, and main contractors across Scotland and the wider UK.
Whether the project is a school refurbishment, a new commercial building, or a residential development, our team provides technical support and product supply to get the right system to site.
Natural and hybrid ventilation systems lower energy demand, reduce noise in occupied spaces, and deliver fresh outdoor air directly to where occupants need it. For buildings where sustainability and comfort matter, they are the perfect choice.
Contact our experienced team in Glasgow today online or by calling 0141 212 3388 to receive your free quote and technical support from our team.