About Us Systemair Systemair was founded in 1974 in Sweden by CEO Gerald Engström, as a company pioneering in the development and market release of circular centrifugal fans that simplify HVAC systems. Its manufactured products include fans, air handling units, air curtains, heating products and since 2012, cooling products. The business percept of Systemair, which operates on the basic values of simplicity and reliability is based on developing, manufacturing, and marketing quality HVAC products. Systemair has registered an operational profit every year since its founding. The average annual...

1. Certificates Certification is a tool that documents that the product is safe and legal. It certifies that all specifications claimed for the products are guaranteed by an independent auditing company. Certified products also offer advantages in terms of delivery times to the customer, by offering easy passage through customs. 1.1. The CE Mark: Systemair HSK has been using the CE mark on its air handling units since January 2003. The CE mark shows the product’s conformance to European product regulations. It is also a mark that enables free distribution of the product within the EU, whose use...

2. Flexline Steel Frame Air Handling Units Systemair HSK’s Eurovent Certified Flexline Air Handling Units offer high resistance to thermal leaks with their 50 mm panel design without thermal bridging, galvanized steel frame profiles that maximise the strength and durability of the air handling unit and their double sloped mineral wool insulated condensation pan manufactured as a standard from stainless steel. Steel sheet thickness 0.8 mm – 1.2 mm that has been galvanized against corrosion is used in interior and exterior surfaces. PVC frame and air handling unit edge profiles insulate against...

2. Flexline Steel Frame Air Handling Units 2.2. Panel Structure 2.2.1. Panel Insulation Material Panel thickness: 50 mm Insulation material: Mineral Wool What is Mineral Wool? Mineral wool is produced by smelting and spraying rocks such as basalt, diabase and dolomite, mixing them with bakalite and subjecting them to special processes. Mineral wool insulation material with a density of 50-70-110 kg/m3 can be used as an option in Flexline Steel Frame Air Handling Units. Technical specifications for 50 - 70 - 110 kg/m3 mineral wool are presented in the following table. Fire Reaction Class Short...

2. Flexline Steel Frame Air Handling Units 2.3. No Thermal Bridging No thermal bridging in an air handling unit indicates high resistance to thermal transmission between the inner environment of the air handling unit and the outer environment which there is a temperature difference. At this point, panel systems which separate the inner and outer environment of the air handling unit are very important. Since metal parts with high thermal transmission are insulated with plastic parts with low thermal transmission, the panel structure of Flexline air handling units display high resistance to thermal...

2. Flexline Steel Frame Air Handling Units 2.4.4. Quick Selection Chart Flexline Air Handling Units can be manufactured in the air flow range of 2,000 m3/h to 100.000 m3/h. The suitable air handling unit casing can be easily selected as a function of the air flow rate and coil surface velocity using the following quick selection chart. VELOCITY DISTRUBITION

3. Frame Drill® Technology The Frame Drill® technology developed by the Systemair HSK R&D team and patented by Systemair HSK has been our new milestone toward the sustainable development of our quality and the increase of our competitive power. Developed in 2007 as the culmination of almost 2 years of study, the Frame Drill® technology is a new production method. In the Frame Drill® business model, the precision of assembly in air handling unit assembly increases, air handling units are assembled from standardized parts, units and can be easily assembled in our outside the factory. Advantages...

3. Frame Drill Technology With the Frame Drill® Technology, air handling unit assembly can be made quite simply and quickly with a systematic coding logic and pictorial installation manual. The traceable coding logic allows the installer to easily find and implement where each part will be used during assembly. Base Frame Assembly Bottom Panel Assembly Base Frame and Bottom Panel

3. Frame Drill Technology Assembly of Bottom and Top Groups Assembly of Section Connecting Components Assembly of Side and Top Panels Finished Section

4. AHU Performance Standards Air handling units can be considered under the three main headings of • Mechanical Performance • Component Selection • Performance Characteristics • Engineering Infrastructure and Software As long as these three major considerations are carried out properly, an optimum product with high performance and minimised energy consumption, capable of correctly meeting customer’s needs will be manufactured. Two European standards assess performance under these three major headings in air handling units. The first is EN 1886 which evaluates “Mechanical Performace” and the second...

4. AHU Performance Standards * The Flexline Steel Frame Air Handling Unit conforms to class L2 with respect to the EN 1886 Casing air leakage test. 700 Pa Casing Air Leakage EN 1886 Air Leakage Class L1 Maximum Leakage Rate ı (f 700) L x s -1 x m - 2 0,22 4.1.3. Filter Bypass Leakage • Filter Bypass Leakage is related to the amount of filtered air passing through the filter section. It can be defined as the ratio of unfiltered air to the total amount of air. • Filter Bypass Leakage tests are conducted under a pressure differential of 400 Pa in the filter section. The following table shows admissible...

4. AHU Performance Standards As the thermal bridging value approaches 1, the probability of condensation on unit surfaces decreases and as the value approaches 0, the risk increases. Since the problem of condensation on unit surfaces is very common in practical conditions, the thermal bridging factor should definitely be taken into consideration among other factors when selecting an air handling unit. Exterior and interior surface temperatures of an ideal casing should be homogeneous and close to the ambient temperature to which it is exposed. For this purpose, in order to approach a thermally...