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 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. Telephone 0700 4 DALAIR                                  Dalair Limited,  Southern Way,  Wednesbury,  West Midlands,  WS10 7BU  •  Tel:  0121 556 9944 Our AHUsWhat types of air handling units do we offer?We deliver a varied and diverse range of Air Handling Units (AHUs) developed to meet your specific needs. The below will give you a flavour of the types of air handling units that we can offer you.Our air handling units are delivered in various case sizes with airflow from 0.2m³/s to 50m³/s.

As you would expect, the larger the flow rate required, the larger the case size but we always aim to deliver maximum system output from the smallest possible footprint whilst providing adequate space for maintenance.We operate with a 'less-is-more' ideology and always strive to manufacture the most compact AHU we can given the required design parameters. This makes them ideal for indoor installation (internal installation) and for outdoor applications (external installation) where space is tight and of paramount importance. AHU unit configurationsWhether you require indoor or outdoor AHUs, side-by-side or stacked AHUs, roof or floor-mounted AHUs we can assist. Configuration is no worry to us and as long as specified at initial tender, we can adapt and develop your air handling unit accordingly.AHU components / optionsBelt drive fan section with optional run and standby facility or motors external to the air streamDirect drive fan section (plenum or centrifugal type, EC or high efficiency AC, PM motor option)Maintenance access, air diffusion space, turning plenumsAttenuationParticulate filtration (panel, bag, rigid)Carbon filtration for odours and contaminantsHigh efficiency particulate air filter Heating coil (water/steam)Cooling coil (water/DX gas)Electric heaterIndirect and direct gas heaterSteam humidifier (direct steam or self-generating – electrode boiler

, resistive, gas)Modulating or shut off damperMixing/exhaust boxPlate heat exchanger (with or without bypass for free cooling) can be aluminium, coated aluminium, plastic, etc.Thermal wheel (sensible, hygroscopic, desiccant, enthalpy)Heat pipeRun around coilsInlet/Outlet with ducted connection/louvre/hood/acoustic louvreAdiabatic cooling or humidificationIntegrated controlsN+1 redundancyAcoustically and thermally insulated casing as standard, with further acoustic and thermal optionsFully welded galvanised steel box section frame work as standard, stainless steel and aluminium optionsInterior lighting and viewing optionsRaised or specially designed base frame optionsFixed (but accessible) or removable drain tray options in galvanised or stainless steelNon standard colours availablePitched roof as standard on externally auto body shops in yuma arizonamounted air handling unitsIntegrated air to air heat pump for cooling or reverse cycle operationFully packaged ‘plug and play’ optionAHUs with complete flexibilityA choice of configurations is offered to give real operating flexibility to suit different applications and operator preference throughout all of our air handling units.recovering freon ac unit

Our Enviropack™ R410A refrigeration package is available throughout all our air handling units, providing the option for cooling (10kW – 235kW) and heating (9kW – 218kW). Available in single and dual circuits, Enviropack™ delivers up to 4 stages of cooling or heating across multiple skid platforms. A single control panel manages both the refrigeration package and the AHU.12000 btu window air conditioner/heat pump Contact our AHU sales engineers for further information AHU Unit Design Enquiry Form Contact a Barkell Account Manager Download a product guideAir Handling Unit (AHU) An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.The basic function of the AHU is take in outside air, re-condition it and supply it as fresh air to a building.

All exhaust air is removed, which creates an acceptable indoor air quality. Depending on the required temperature of the re-conditioned air, the fresh air is either heated by a recovery unit or heating coil, or cooled by a cooling coil.In buildings, where the hygienic requirements for air quality are lower, some of the air from the rooms can be re-circulated via a mixing chamber and this can result in significant energy savings. A mixing chamber has dampers for controlling the ratio between the return, outside and exhaust air. The AHU is a large metal box containing separate ventilators for supply and exhaust, heating coil, cooling coil, heating/cooling recovery system, air filter racks or chambers, sound attenuators, mixing chamber, and dampers. AHUs connect to ductwork that distributes the conditioned air through the building, and returns it to the AHU.A heat/cooling recovery exchanger is normally fitted to the AHU for energy savings and increasing capacity.An AHU designed for outdoor use, typically on roofs, is also known as a rooftop unit (RTU).