(How to get there) AHU Sizing AHU configurationOur AHU sizing guide enables you to rapidly select the appropriate unit size for a specific project requirement.  Simply, select the velocity and volume (or next highest value) required from the table. Then, locate the unit size, external width and external height from the left hand column. Finally, add the base height to the external unit height and 50mm for a pitched roof if the unit will be sited in an external location. Please note that dimensional restrictions may dictate a higher velocity of around 3m³/s. This, however, is likely to mean that the AHU specific fan power will exceed Building Regulations requirements. Subject to external static pressure and internal components, Building Regulations requirements may be met at an AHU velocity of 2m³/s.If the image doesn't display correctly or you wish to download the guide as a PDF please use the link below:AHU sizing guide (matrix below as a .pdf file) Approximate Length of Air Handling Unit Components for Unit Size (.pdf)Approximate Weight of Air Handling Unit Components for Unit Size (.pdf)

Contact our AHU sales engineers for further assistance Systems for Critical Services Victaulic Introduces Spigot Outlet Style 926 for HDPE Pipe Victaulic Unveils Industry’s First Intelligent Roll Grooving Tool Victaulic to Showcase Innovative Mining Products at MINExpo International 2016 Victaulic Honored with IndustryWeek Best Plant Award Victaulic Foundry Safety Coat Recognized by Edison Awards Victaulic Corporate Media Kit Product line Air-handling units Back to the product list Modular air handling units are intended for central distribution and conditioning of air in both industrial and commercial applications. They feature high efficiency of air distribution and conditioning. They offer air flow volume from 500 to 100 000 m3/h. They are completely designed and certified in a unique frameless casing. High design variability - custom solutions. airflow volume from 500 to 100 000 m3/hod 31 sizes - 15 in square cross section, 16 in rectangular cross section

unit casing certified by the Munich laboratory of TÜV-SÜD the possibility of the proposal in the energy classes up to A + according to the requirements of the German Association of manufacturers of air conditioning equipment RLT and release of the label certified by the German company TÜV-SÜD Industrie Service GmbH standard configuration - supply and exhaust parts of the unit one above/next to each other, or in overhead version indoor, outdoor or hygienic versionsfinancing for an ac unit possible selection of surface finish by powder painting - external/internal parts of casing and sheet metal parts of the unit internalsno cold air from ac unit ATEX version for the explosive environment on demandwindow ac unit brands smooth internal surface in standard design without additional assembly modifications

variable efficiency of energy recovery heat exchangers own gas-fired heaters of the outputs 15 to 610 kW control system on the Siemens Climatix platform attention paid to high quality workmanship and the price/performance ratio attention paid to high quality of proven and certified purchased components attention to easy access for service and maintenance optional warranty extension up to 60 months Mechanical performance of casing Mechanical strength of casing: D1 (M) Casing air leakage: L1 (M) Thermal bridging of the casing: TB2 Filter bypass leakage: 0.5% - F9 (M) Acoustic insulation of the casing: Air handling unit functions Air filtration - frame, bag or fat filters, HEPA filters, active charcoal Air distribution - direct driven AC or EC motors heating - water, steam, electrical, gas cooling - water, direct evaporator heat recovery - plate (cross/counter-flow heat exchanger), rotary recovery, liquid

humidifying - steam, water Noise attenuation - baffle silencers Engineering design of the air handling units The air handling units can be designed by means of the design software AHU Mandík. AHU Mandík provides quick and clear design including output data sheet and other output formats such as PDF or DWG. The design software can be downloaded on our website DOWNLOAD. Possibility of using our free service of engineering design by our specialists, or contact to sales representatives CONTACTS.The Eco-Design Directive, which has entered into force on 01.01.2016 for air handling units, sets minimum requirements for energy efficiency. All AHU manufacturers in the 28 countries of the EU are affected. DencoHappel are complying with the requirements, however to achieve this, some adjustments have been made on the products. The Objective of the Eco-Design Directive The Eco-design Directive or ErP (2009/125/CE) aims at reducing by 20% greenhouse gases emissions within the European Union by 2020 (greenhouse gas emissions have to be divided by 4 by 2015) by reinforcing energy efficiency on energy consuming products.

The directive sets not only minimum requirements for the energy efficiency, but also a limit on noise level and on polluting emissions. The directive concerns products sold for more than 200 000 pc per year within the European market and which may have a major impact on environmental issues. Experts estimate that 20 categories of products represent roughly 80% of results regarding reduction of greenhouse gas emissions. Over time, products which have a strong impact on energy consumption and gas emissions will disappear slowly from the market, for instance the CMV (Controlled Mechanical Ventilation) and cross flow heat exchangers. Implementation of the Eco-Design Directive The European Directive sets the major requirements on Eco Design applied on products which are consuming energy, in order to reduce their environmental footprint, and particularly their energy consumption.  This is concerned as the most relevant parameter along the Life Cycle Cost of the product: manufacturing, shipping, handling and end of product life.

The conception phase is where initiatives are the more important to improve product energy efficiency performance, and thus improve its impact on the environment. Some examples of requirements from the Eco-design Directive: dual flow (bidirectional) ventilation units must be equipped with a high efficiency energy recovery system and a controller (by pass, rotor speed command). The fans must be equipped with a motor with several speeds or a frequency converter (except for multi-purpose units, e.g. ventilation + smoke extraction). Consequently, the Eco-design directive urges Air Treatment manufacters to investigate on new solutions. Three applicable regulations of the Eco-Design Directive concerning directly the AHUs have entered into force by the beginning of 2016. They are reinforcing the requirements towards electrical motors (commission regulation EU 640/2009), fans of an electrical power between 125W and 500kW (commission regulation EU 327/2011) ventilation units which aim at bringing fresh air into the building to replace the used air (commission regulation EU 1254/2014).

This last requirement makes a differentiation between residential and non-residential units, which have an air flow equal or superior to 1000 m3/h. DencoHappel brings global improvements on their AHUs and particular care is given to the aeraulic components in order to reduce pressure losses by maintaining low air speeds as much as possible and to the fans to improve their efficiency. The recovery systems with rotary or counter flow plate heat exchangers, instead of cross flow plate heat exchangers, low energy consumption electric drives (EC, impeller with backward curved blades, direct drive plug fans). DencoHappel puts forward the fact that some sections of the AHU have been enlarged to comply with the directive. Thus, it might be that in order to comply with the requirements a bigger space of installation will be needed. Besides, if the purchasing price of an AHU “ErP2016 compliant” is higher than a standard one, this price difference will be quickly compensated by the gain realized thanks to the reduction of energy consumptions.

Return on Investment (ROI) is reached in an average time period of 1.5 to 2 years compared to a standard AHU. Manufacturers, among them DencoHappel, agree that the Eco-Design Directive includes  “grey” areas which will hopefully be clarified in 2016 by the EU commission. Moreover, the number of different regulations regarding the same equipment (motors, fans,… ) set requirements which are not always compatible between them. Manufacturers are already concerned about the delay impacting on the ability to achieve the requirements of the next step of the ErP directive, which will be effective on the 01.01.2018. For example, the heat exchangers efficiency must be as from the 01.01.2016 of 63% with a heat transfer fluid and 67% for all other cases, this value will increase respectively to 68% and 73% by 2018. To sum up, professionals have to compare and understand the technical datasheets to be able to rank different AHUs, because a large part of the directive is open to interpretation.