IT-KN 7-7 kw. Dimensions. Heat load / Output (kw) 7.0. Angle of installation 15 / 30 / 45 / 60. Gas consumption. natural gas (m 3 /h) 0.

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1 IT-KN 7-7 kw Heat load / Output (kw) 7.0 Angle of installation 15 / 30 / 45 / 60 Gas consumption. natural gas (m 3 /h) 0.74 Gas consumption. liquid gas (kg/h) 0.58 Weight (kg) 9 a - Length (mm) 796 b - Width (mm) 357 c Reflector length (mm) 605 depending on the tilt angle to horizontal of ceramic surface. 4.0 m 4.0 m 4.0 m 4.0 m

2 IT-KN kw Heat load / Output (kw) 10.5 Angle of installation 15 / 30 / 45 / 60 Gas consumption. natural gas (m 3 /h) 1.16 Gas consumption. liquid gas (kg/h) 0.92 Weight (kg) 12.1 a - Length (mm) 1010 b - Width (mm) 357 c Reflector length (mm) 789 depending on the tilt angle to horizontal of ceramic surface. 4.0 m 4.3 m 4.0 m 4.0 m

3 IT-KN kw Heat load / Output (kw) 17.5 Angle of installation 15 / 30 / 45 / 60 Gas consumption. natural gas (m 3 /h) 1.93 Gas consumption. liquid gas (kg/h) 1.52 Weight (kg) 16.1 a - Length (mm) 1445 b - Width (mm) 357 c Reflector length (mm) 1156 depending on the tilt angle to horizontal of ceramic surface. 5.9 m 5.5 m 4.9 m 4.1 m

4 IT-KN kw Heat load / Output (kw) 10.5 / 21.0 kw Angle of installation 30 / 45 / 60 Gas consumption. natural gas (m 3 /h) 2.33 Gas consumption. liquid gas (kg/h) 1.84 Weight (kg) 24 a - Length (mm) 1040 b - Width (mm) 543 c Reflector length (mm) 789 depending on the tilt angle to horizontal of ceramic surface. 6.3 m 6.0 m 5.6 m 4.8 m

5 IT-KN kw Heat load / Output (kw) 17.5 / 35.0 kw Angle of installation 30 / 45 / 60 Gas consumption. natural gas (m 3 /h) 3.85 Gas consumption. liquid gas (kg/h) 3.04 Weight (kg) 28.2 a - Length (mm) 1550 b - Width (mm) 543 c Reflector length (mm) 1156 depending on the tilt angle to horizontal of ceramic surface. 7.6 m 7.0 m 5.9 m 5.2 m

6 Benefits of radiant heating: Advantages of radiant heating over traditional heating systems: low primary energy consumption environmentally friendly (see also next chapter) low investment costs sensation of pleasant warmth no drafts to circulate dust low noise emission warm floor due to direct radiation indirect floor heating (no more cold legs) low emission heating of specific zones is also possible no risk of freezing with ceramic heaters and tube radian heaters can be modified in case of reconstruction or extension suitable for heating open areas as well Energetic advantages of radiant heating Radiant heaters are more economic compared to other heating systems, as: actual air temperature can be lower only short heating periods are needed there is hardly any heat layer below the hall cover secondary energy consumption is lower heating can be performed either in the entire room or in its specified areas

7 Dimensioning of radiant heating Determination of heat demand Dimensioning, installation and operation of radiant heaters are regulated in European Standard EN13410, in DVGW worksheets G 638 I (ceramic heaters) and G 638 II (tube radiant heaters). Heat demand for halls is determined on the basis of DIN If ceramic heaters or tube radiant heaters are used, the desired air temperature can be decreased by 3 K. This results in lower transmission and ventilation heat demand. For new halls insulated in accordance with the heat protection regulation, the following heat demand values can be used a basis for calculation: Hall height up to 6 m up to 8 m above 8 m Heat demand 80 W/m² 90 W/m² 100 W/m² After determining the heat demand, the types and number of heaters have to be specified. Up to about 8 metres, usually tube radiant heaters are used. In halls higher than 8 metres, ceramic heaters are recommended. Ceramic heaters cannot be used if the suspension height is below 4 metres (hall height is below 5 metres). Minimum suspension heights Minimum suspension heights of various heaters with different angles of installation: Heater (vertical) Ceramic heater 7.0 kw 4.2 m 4.0 m 4.0 m Ceramic heater 10.5 kw 4.8 m 4.0 m 4.0 m Ceramic heater 17.5 kw 6.0 m 4.9 m 4.1 m Ceramic heater 21.0 kw 6.8 m 5.6 m 4.8 m Ceramic heater 35.0 kw 7.8 m 5.9 m 5.2 m

8 Minimum clearance from combustible materials Infrared ceramic and tube radiant heaters have to be installed in accordance with G 638 I and II DVGW worksheets in a way that the surface temperature of combustible materials in the area of radiation cannot exceed 85 C. This is ensured if the minimum clearances between the radiation surface and the combustible materials are as follows: Downwards Laterally Upwards Tube radiant heater 1.5 m 0.8 m 0.5 m Ceramic heater 2.5 m 0.8 m 0.8 m (Values in brackets refer to ceramic heaters.) Because of the longitudinal deformation of tubes due to thermal expansion, tube radiant heaters have to be suspended with a minimum distance of 40 cm. Installation of heaters The heaters can be suspended vertically from the ceiling or mounted in a tilted way on the side walls. The heaters should be distributed evenly in the heated space. The heaters due to the reflector radiate in an angle of 60 in both directions from the vertical. If several heaters are used simultaneously, the radiation areas should overlap. This can be ensured if the maximum distance of heaters equals to 2.5-fold of suspension height. If the heaters are tilted, the depth of influence (radiation overtemperature) with 45 angle of radiation is 1.5-fold of the suspension height. Designing the installation of gas-operated infrared heaters We are willing to assist you in designing your radiant heating system. Just send us the hall layout, our questionnaire and a drawing with the dimensions, and we design the most appropriate solution for heating without any obligations.

9 ABACUS infrared ceramic heater IT/KN 7/10/17/21/35 AE A ceramic heater is a radiant gas heater with perforated ceramic lining that operates practically without flame. Gas-air mixture is flown through the injector on the fine-pore ceramic surface. The mixture is ignited with electric ignition and completely burnt. This heats up the ceramic surface to 800 C, which glows bright red. The radiation wavelength range of the glowing surface is between 0.8 µm 4 µm, which is directed by the reflector. The output of abacus infrared gas ceramic heaters is between 7 kw and 35 kw. The selection of appliance type is based on the space to be heated and utilization. As the ceramic surface is heated to a high temperature, the heaters have to be installed in suitable height, or else unpleasant heat will be felt at head height. Exhaust gas extraction According to the standard EN and the regulation DVGW G 638 I, the exhaust gases mixed with the air in the room where the abacus infrared gas ceramic heaters are operated should be extracted through the vent above the heaters. The horizontal distance between the radiant heater and the vent cannot exceed 6-fold of the height of vents in case of wall vents or 3-fold of the height of vents in case of roof vents. Exhaust gas extraction is sufficient if at least 10 m3/h exhaust gas is removed (e.g. by blowers) per 1 kw installed nominal heat load. Proper combustion air supply has to be ensured.. Suspension height of ceramic heaters Infrared ceramic heaters have to be installed in a way to prevent that people in the area of radiation are exposed to unbearably high temperatures. Therefore, the minimum suspension heights have to be complied with: Output kw Suspension heights in metres with the specified angel of installation Minimum suspension heights are specified for standard conditions (air temperature >15 C, air speed >0,3 m/s). Minimum clearance from combustible materials Infrared ceramic heaters have to be installed in a way that the surface temperature of combustible materials in the area of radiation cannot exceed 85 C. This is ensured if the minimum clearances between the radiation surface and the combustible materials are as follows: Output Distance Outside the area of radiation, the minimum clearance above and beside the heater should be 0.8 m.