Large AHU undergoing volumetric test at our Technical Centre
Dalair Limited supply a range of quality air handling equipment, custom designed and built to suit customer requirements. Moreover, our designs are invariably tailored to optimise efficiency and minimise running costs; resulting in systems that are not only better for the enviroment but are also of benefit to your budget.
Additional services offered include factory and on site AHU testing, site installation services, routine preventative maintenance contracts and extended warranties. Our service and maintenance division also undertake site surveys and refurbishment of our both our own and other manufacturer's equipment.
Spares, from filter media and drive belts to replacement motors and fans, are also available from our service and maintenance division.
Colourful "Sun Yellow", rooftop AHU's at one of the International Quarter buildings, London
Preliminary design, at tender stage, is undertaken by our technical sales staff and is based upon the required volumes, taking into account any limiting factors or unit specification.
Once an order is placed, the project is passed to our contracts department, where the initial design will be fine-tuned and finalised by our highly experienced contracts engineers.
General arrangement drawings are then produced, using up to date CAD facilities, and are issued for written approval prior to manufacture .
We are able to provide Revit rfa files of our AHU's for incorporation into your BIM projects.
Units are manufactured in the UK at our Wednesbury head office.
Although materials may vary with the unit size and application, all AHUs are of a similar construction; namely an outer framework of posts, assembled using knock in corners, into which double skin, insulated enclosure panels are fitted to form a rigid, airtight compartment.
Smaller units can be supplied as a single section, whereas larger units are usually supplied in modular form, split into manageable sections for final assembly (bolting-up) on site.
AHU sections are generally supplied with a sturdy channel base support frame, complete with lifting holes to facilitate craneage.
All internal components, such as the fan and motor assembly, are built in to the unit sections and are provided with access or removable panels, if necessary, to facilitate maintenance and removal.
All forms of component commonly utilised in air handling equipment can be incorporated into the design such as filters, heaters, coolers, humidifiers, attenuators, plate heat exchangers, thermal wheels and run around coil heat recovery systems.
Premier bespoke construction
Robust insulated steel framework
Fully powder coated framework and base support
50 mm double skinned panels
Excellent enhanced thermal and acoustic properties
Internal & external applications
High pressure applications
Air volumes up to 100 m³/s
"SPMA" 25 mm double skinned panels
"MA" 50 mm double skinned panels
Excellent enhanced thermal and acoustic properties
Internal & external applications
High pressure applications
Air volumes up to 60 m³/s
Plug & play
Rotary or plate heat exchanger
Integrated BMS controller
Fully factory wired
Universal control functions
Air volumes up to 5.5 m³/s
Cold free/thermal break construction
Swimming pool equipment
Critically acoustic projects
One of Dalair Limited's most prestigious contracts: - The Shard
(Photo by Fred Moon on Unsplash)
We can provide both in-house and on-site testing of our air handling equipment at our dedicated, 50,000 sq.ft (4,650 m²), test facility accommodationg all the latest test arrangements; -
• Leakage (pressure)
• Volumetric (performance)
• Acoustic (in duct and casing radiated)
• Vibration monitoring
In December 2008, Dalair Limited invested in a dedicated test facility, capable of accommodating the test arrangements for the largest size of unit we can manufacture. Prior to this, there had always been conflict, as the factory space required for manufacture would be occupied by large test arrangements. Additionally, acoustic tests could not be performed until after normal working hours, resulting in late nights and overnight stays for our customers witnessing the tests. The acquisition of the Technical Centre and its location, at the end of a quiet cul-de-sac, has alleviated both of these problems.
Dalair Limited employs dedicated teams of service engineers to fulfil our customers' requirements for installation, service and maintenance of our air handling units.
All operatives are Construction Skills Certification Scheme (CSCS) card holders as proof of their occupational competence and site experience.
The following services are available: -
• Site assembly of units supplied in flat pack form
• Final assembly ("bolting up") of units supplied in sections
• On-site testing of units
• Investigation and rectification of faults occurring within the warranty period
• Performing scheduled service and/or maintenance of our AHU's nationwide
• Carrying out ad-hoc repairs and/or maintenance outside of warranty
We consider that the commissioning of specialised air handling unit components, such as humidifiers or gas heaters, is best carried out by the original equipment manufacturer. We can arrange for the commissioning of these items to be included as part of our offer of supply.
If you do not have a credit account with us, spares can be supplied on a pro-forma invoice basis, however, payment must be cleared prior to despatch.
We are also able to accept payment by credit card. All card payments are subject to an additional 5% administration charge.
There is a minimum order value of £100.00.
Our contract reference or the general arrangement drawing number, if known, will help us to identify the correct spares for your installation.
Our spares list includes, but is not limited to, the items listed below: -
• Replacement filter media
• Spare Keys
• Door rubber
• Drive Belts
• Pulleys and taper locks
• Anti-vibration mounts
• Door locks and latches
• Manometers and manometer fluid
• Replacement coils
Please contact Dalair's Service & Maintenance division for a quotation for spares.
Our air handling units are supplied with a free standard 12-month warranty, in respect of faulty workmanship and components from the date of delivery and subject to full and documented evidence that maintenance has been carried out by competent engineers or, preferably, Dalair's own service engineers
So far as it is reasonably possible, we will pass on the benefits of any guarantees or free service commitments, offered by the manufacturers or suppliers of items of equipment incorporated into our air handling units.
Dalair do not accept responsibility for repair costs and remedial work to AHU structures or components caused through damage during off-loading, craneage and installation, the lack of or incorrect maintenance, incorrect operation, system dampers closing or failing allowing full fan pressures to be exerted on the unit structure, malicious damage or incorrect wiring/piping of components.
Please refer to our standard Terms & Conditions of Sale for full details of the warranty.
Extended warranties are available.
Dalair's Service & Maintenance division can undertake site surveys of our own and other manufacturers's air handling equipment and provide you with a detailed, comprehensive condition report that will enable you to decide the correct course of action to take.
Refurbishment of existing equipment, (both of our own and other company's manufacture), can have significant advantages, including : -
Extends the lifespan of existing installations.
Cost savings compared with that of a replacement system.
Reduced downtime and minimal disruption.
Increased efficiency utilising the lastest energy efficient components.
One of Dalair Limited's prestigious contacts: - Bluewater Shopping Centre, Kent
(Photo by DAVID ILIFF. License: CC-BY-SA 3.0)
The vision we have at Dalair Limited is to strengthen our position as the leading provider of high quality Air Handling Solutions by delivering value and exceeding the expectations of our customers while protecting the environment and ensuring the safety of those involved in our activities.
We aim to preserve at all times our reputation in building upon the quality of our products and the excellence of our people.
Our Leadership approach is to build an attractive and safe place to work whereby the company targets set are achieved by managing business and leading people.
Dalair Limited is a privately owned company that operates nationwide, has a passion for our people and is purely focused on implementing the following criteria: -
Our success is derived from creating value for our customers, employees & suppliers alike.
We will continuously improve the product and our service from within our organisation.
Dalair Limited have supplied AHU's for many of the high rise structures in Canary Wharf
Since it's conception in the early 1980's, Dalair Limited has consistently demonstrated its commitment to quality, the environment and health & safety issues by adopting the relevant management systems and attaining accreditation to recognised industry standards.
Information relating to our company polices and objectives is made freely available to all employees, all actual and potential customers and suppliers and to all external interested parties.
Dalair's Quality, Environmental and Health & Safety policies are displayed in the reception areas and on notice boards at all company locations. Electronic copies are also included within the company's Internet pages.
Dalair Limited first achieved certification of its Quality Management System (QMS), to BS 5750, Part 1 standards, in November 1988.
With the introduction of new quality standards our QMS has been upgraded, with certification to BS EN ISO 9001:1994 gained in December 1995, BS EN ISO 9001:2000 in December 2003 and BS EN ISO 9001:2008 in October 2010
Our current QMS, certified to BS EN ISO 9001:2015, was awarded in December 2017 and includes the operations of our London sales office, the Service & Maintenance Department and the Technical Centre.
Dalair Limited successfully achieved certification of its Environmental Management System (EMS) to BS EN ISO 14001:2004 standards in November 2009. Our current certificate, to BS EN ISO 14001:2015, was awarded in June 2018.
We have taken on the requirements of the ISO 14001 standard to help us minimise the impact our business activities have on the environment.
We hope that by raising environmental awareness throughout the company and by influencing those who work with us, we will create a positive effect upon the environment locally and on a global scale.
In November 2011 Dalair Limited successfully achieved certification of its Health & Safety management system, to OHSAS 18001:2007 standards.
Our current Health & Safety certification, to BS EN ISO 45001:2018, was attained in October 2020.
As a responsible manufacturer, Dalair Limited is committed to best practice in all matters relating to the health, safety and welfare of its employees and those who may be affected by our business activities.
Our aim is to develop a culture whereby the achievement of health and safety objectives will be regarded as an integral part of our business.
We have been members of the British Safety Council since November 2003 and became a certified member of the CHAS scheme in September 2016.
Dalair Limited have also supplied AHU's for many of the buildings in the City, including Lloyd's Register, the Gherkin and Walkie Talkie building
(Photo by © User:Colin and Kim Hansen / Wikimedia Commons, via Wikimedia Commons)
Please do not hesitate to contact us if you have any questions with regard to our products or services.
Furthermore, your feedback, comments and suggestions are always welcome and will assist us in continuously improving our business.
Your name and email address are required, however, if you would prefer us to contact you by telephone, please enter the number and we will get back to you as soon as possible.
Dalair operate from four locations, strategically placed to cover the whole of the UK.
The core elements of our business, including our main manufacturing facility, are based at our Wednesbury Head Office.
All AHU testing is carried out at the nearby Technical Centre, which also serves as the base for our Service & Maintenance divison.
Satellite sales offices, in central London and Manchester, compliment our presence in the Midlands and are ideally situated to serve the Southern and Northern regions.