The complete energy-saving range.

Transcription

1 The complete energy-saving range. therm-x2 steel panel radiators Heat pumps Heat storage Controls Panel heating/cooling systems Steel panel radiators Domestic ventilation

2 The right time for a new generation of radiators: therm-x2. The energy-saving radiator. 2

3 therm-x2. The energy-saving innovation with unrivalled added comfort. Functional problem: controlled operation... 4 The x2 solution to the problem: in series instead of in parallel... 6 Significantly better dynamics... 8 Maximum comfort at all times High energy efficiency Evaluation of the x2 technology using actual measurements Evaluation of energy efficiency of the x2 technology using simulation Kermi therm-x2 Profile panel radiators Kermi therm-x2 Plan steel panel radiators Kermi therm-x2 Line steel panel radiators Kermi Verteo vertical steel panel radiators Kermi renovation solutions Kermi radiation shield At a time when energy costs are constantly increasing, legal requirements are becoming more stringent and customer demand for cosy and comfortable living is increasing, Kermi is providing the unique solution: therm-x2. The world's first and only steel panel radiator with serial flow, which provides up to 11 % energy-savings, while at the same time ensuring 100 % comfort at all operating points. A milestone of heating technology, precisely adapted to the requirements of the new standards and regulations as well as the improved insulation standards for new buildings and renovation. Give your business a real boost with therm-x2. For a clear competitive edge, complete customer satisfaction, less pricing pressure and more added value. 3

4 Functional problem in controlled operation. The weak points of standard steel panel radiator technology are demonstrated in this practical example. Space heating requirement Living space Area: 31.5 m² Ventilation heating consumption Ф V : Transmission heating demand Ф T : Total demand Ф HL, net : 508 W 1174 W 1682 W Radiator design acc. to DIN Heat demand Ф HL, net 1682 W Additional heating capacity Ф R,H 794 W* Rated heating load Ф HL 2476 W Operating point of the radiator A practical example that clearly illustrates the weak points of standard steel panel radiator technology today. Rated heating load Ф HL 2476 W Required heat demand Ф req. 902 W Output ratio Ф req. /Ф HL 36 % Mass flow ratio m req. /m HL 15 % Living room in new building or modernised old building, full thermal insulation Area: 31.5 m² Window 1: 1.3 m² Window 2: 1.3 m² Exterior door 1: 2.3 m² Exterior door 2: 2.3 m² Internal heat sources People 200 W (2 x à 100 W) Audio/TV system 400 W Lighting 180 W (3 x à 60 W) Outside heat 780 W = 31.5 % of Ф HL Necessary balance Ф req. 902 W Single family house Building mass: Building location: Air-tightness: Location: Rated outdoor temperature: Annual average: heavy moderate screening very air-tight Metten, Germany -18 C 6.3 C *) This value is based on the following assumptions: n = 0.5 1/h, reheating time = 2 h, temperature decrease during setback = 2.2 K, Heavy building mass >> f RH = 25.2 W/m²; F RH = A i * f RH = 31.5 m² * 25.2 W/m² = 794 Internal heat sources: People 200 watts Audio/TV 400 watts Lighting 180 watts 4

5 The problem. Correlation between water flow rate and output (type ). Heat output W W % 20 % 40 % 60 % 80 % 100 % 15 % Mass flow ratio m req./ m rat Conclusion: Because of the internal heat sources, in controlled operation 54 % of the maximum heat demand, and therefore only 36 % of the possible standard heat load, is required. Consequences: The radiator must reduce the flow rate to 15 %. The average surface temperature drops to well below 40 degrees. The user has the impression that the heating is defective or out of order. This results in a corresponding lack of comfort and unnecessary complaints. 5

6 The x2 solution to the problem: in series instead of in parallel. The x2 principle. Standard steel panel radiator technology with a triple advantage. The innovation with multiple competitive edge: significantly improved dynamics, outstanding comfort at every operating point and high energy efficiency. 6

7 The solution. While in the existing steel panel radiator technology, all of the panels are connected in parallel and therefore streamed at the same time, the therm-x2 uses a completely new, unique principle: serial flow-through. This means that the front panel is connected in series with the panels behind it; so the flow passes through the front panel first. In controlled operation, the front panel's output is completely sufficient and the downstream panel hardly heats up at all. Only as the output demand increases does it also contribute to rapidly heating the room with high convection output. 7

8 Significantly improved dynamics. The desired room temperature is reached much more quickly. Dynamic response Example: Type 22, height 600, length 1000 From idle state to the maximum heat output of the radiator at 100 % mass flow rate. Time in s Standard steel panel radiator 25 % shorter heating-up period. therm-x2 Standard steel panel radiator Valve fully open for 800 s Output = 1158 W (70 C / 55 C) T O after 200 s = 43.5 C T R after 800 s = 55 C Kermi therm-x2 steel panel radiators Valve fully open for 600 s Output = 1158 W (70 C / 55 C) T O after 200 s = 50 C T R after 600 s = 55 C Thanks to the x2 principle, the therm-x2 achieves its required heat output up to 25 % more quickly. T O = Average surface temperature T R = Return temperature m = 66.5 l/h * Source: Research report by Prof. Dr.-Ing. Rainer Hirschberg "Dynamic Response and Energy Expenditure of a Steel Panel Radiator with Panels Connected in Series". 8

9 up to 25 % shorter heatingup period up to 100 % higher radiation component up to 11 % energy saving Comparison of heating-up phases 10 Standard steel panel radiator therm-x2 Significantly improved dynamics, quick response and shorter heating-up period. The x2 principle of serial flow is ingenious and the result is unique in several ways. This is already clear from the dynamic heating process and the significantly shorter response time of the front panel. As the comparative example demonstrates, the therm-x2 leaves the standard steel panel radiator standing. The radiator requires 25 % less time to reach its maximum heat output Time in min. at 10 % mass flow rate W Significantly improved dynamics W The front panel can respond quickly W Up to 25 % shorter heating-up period for radiator W Room heats up more quickly 9

10 Maximum comfort at all times. Greatly increased radiation component for outstanding heating comfort. DIN EN requires the following with regard to the dynamic heating process: "For rooms with intermittent heating operation, a reheating factor must be determined in agreement with the user." Consequence: The heat output that has to be installed must be increased by the required reheating output. Result: The controlled operation takes place more frequently under partial load. This reduces the radiation component and therefore the comfort. Standard steel panel radiator In contrast, VDI 6030 demands: "In order to ensure optimal comfort at all times, the radiator should provide maximum radiated heat output, even at low flow rates in partial load mode." For example, in controlled operation at 20 % of the nominal mass flow rate (= approx. 65 % of the heat output of the radiator), the radiated heat output of the therm-x2 in the room is approx. 1.5 times higher for types 12 and 22 and 2 times higher for type 33 when compared to standard steel panel radiators. Radiated heat output therm-x2 Profile-V / -VM / -K, therm x2 Plan-V / -VM / -K radiation component Type 12 Type 20 Type 22 Type 30 Type 33 Standard steel panel radiator 20 % 35 % 20 % 20 % 10 % therm-x2 30 % 45 % 30 % 30 % 20 % Source: Research report from WSPLab, Dr.-Ing. Harald Bitter "Metrological Research on Steel Panel Radiators to Determine the Room-Side Radiated Heat Output" 10

11 up to 25 % shorter heatingup period up to 100 % higher radiation component up to 11 % energy saving Kermi therm-x2 steel panel radiators W Maximum thermal comfort at all times, even in partial load mode W Significantly higher average surface temperature of the front panel W Increased radiation component = more heating comfort Example: Type , flow temperature approx. 50 C Time [min] Mass flow rate [%] Average surface temperature [ C] therm-x2 Standard steel panel radiator Ø [%] after approx. 40 approx after approx. 43 approx after approx. 45 approx Because of the additional heating load according to DIN EN that has to be factored into the design calculation, as well as the internal heat sources, the maximum radiator output requirement may only be required on around 10 days. This means that for 90 % 95 % of the heating period, controlled operation takes place at a partial load of between 10 % and 30 % of the mass flow rate. During this time, the average surface temperature decreases significantly. The result is a corresponding lack of comfort and complaints that take a great deal of time and expense to deal with. With therm-x2 the situation is completely different. A thermographic comparison clearly shows this: a significantly higher average surface temperature of the front panel. The radiation component is consequently up to 100 % higher. This means that the therm-x2 not only successfully counteracts the negative effects of DIN EN on the partial-load behaviour. Additionally, only the steel panel radiator that fulfils the requirements of VDI 6030 in every respect. This leads to a high degree of customer satisfaction due to a significant gain in feel-good warmth and comfort. 11

12 High heating efficiency. Innovative technology which effectively saves energy. DIN and DIN V describe the energy efficiency of all heating system components in the German Energy-Saving Ordinance (EnEV) certificate. Until now, only standard reference values have been used for radiators. Improved specific characteristic values have been a false indication until now. Shorter heating-up periods, a higher radiation component and lower radiation loss as well as the longer hot water path give the therm-x2 an energy efficiency that is unparalleled in the field of steel panel radiators. During controlled operation the rear panel is hardly heated at all. Due to the low heat output on the wall side, it performs a radiation shield function. All of this, in conjunction with factory preset valve inserts, leads to a reduction in energy costs of up to 11 %. Based on the expenditure figures currently specified in the DIN standard, use of therm-x2 for e c in conjunction with a P controller (design according to 1K or 2K) brings about a 0.03 improvement in expenditure, or 0.02 if a PI controller is used. The degrees of utilisation specified in DIN V also improve when therm-x2 is used. The value to be used for η c improves by 0.03 when a P controller is used (design according to 1K or 2K), or by 0.02 when a PI controller is used. With energy-savings of up to 11 %, the therm-x2 has a valuable positive influence on the building's energy efficiency which is decisive for the energy certificate. W High heating efficiency. W Reduction in heating costs W Effective contribution to protecting our environment 12

13 up to 25 % shorter heatingup period up to 100 % higher radiation component up to 11 % energy saving Comparison of annual primary energy requirements: old building, old building according to WSVO95, new building according to EnEV approx. 300 kwh/m²a approx. 100 kwh/m²a approx kwh/m²a old building old building (according to WSVO95) new building (according to EnEV 2014) Efficient energy-savings of up to 11 % with: x2-inside technology (up to 6 % energy-savings) W Faster heating-up period. The forced flow effects a shorter heating cycle, shorter operating times and the valve closes more quickly. W Higher radiation component in the room. Due to the higher average surface temperature of the front panel at every operating point. W Lower radiation loss at the outer surface. Due to the lower average surface temperature of the rear panel at every operating point. W Greater ΔT between flow and return. The hot water needs to pass a greater distance inside the radiator (different heat exchanger characteristics). This increases the energy yield, especially in partial load mode with lower mass flow rate and lower circulation and generation losses. k v -factory preset valves (up to 6% energy-savings) W k v -factory preset valves ensure more or less ideal hydraulic conditions in the heating system ex works. W Approximately 20 % of the pump drive current is also saved. 13

14 Evaluation of the x2 technology using actual measurements. Comparative measurements between therm-x2 and standard steel panel radiators W 1st measurement: heat pumps (flow 40 C) W 2nd measurement: condensing boiler (flow 55 C) W 3rd measurement: low-temperature boiler (flow 70 C) Measurement: heat pump Specified system temperatures: Flow (T v ): 40.0 C, Air (T L ): 20.0 C Standard steel panel radiator therm-x2 Δ Mass flow rate: 65±1 l/h 65±1 l/h - Standard volumetric flow: 123 l/h 123 l/h - Ratio m req. /m des. : 52 % 52 % - Flow temperature: 41.8 C 42.1 C - Return temperature: 31.8 C 30.5 C C (- 6 %) Average surface temp. front: 32.4 C 37.6 C C (+ 16 %) Average surface temp. rear: 33.1 C 30.1 C C (- 9 %) Radiation into the room Standard steel panel radiator therm-x2 Δ q = W/m² q = W/m² + 7 % q = E * C S * ( T ) Average surface temperatures of the front panel: Standard steel panel radiator = 32.4 C therm-x2 = 37.6 C Radiation exchange with wall / window q 12 = E * C 12 * [( Panel) T 4 ( T W.F ) 4 ] Standard steel panel radiator therm-x2 Δ q 12 = W/m² (wall) q 12 = W/m² - 20 % q 12 = W/m² (window) q 12 = W/m² - 17 % Average surface temperatures: Standard steel panel radiator = 33.1 C therm-x2 = 30.1 C Wall = 17.0 C Window = 14.0 C Formula symbols: q = Heat flow density [W/m²] C = Radiation exchange constant [W/m²K4] E = Emission ratio T = Average surface temperature [K] 14

15 Methodology Evaluation of the results is based on a momentary reading. To do this, a measuring point was accessed at the end of the heating phase. All calculations are based on this measuring point. The same measuring point was used for all heat sources / temperature levels. This enabled a one-to-one comparison of results. Measurement: condensing boiler Specified system temperatures: Flow (T v ): 55.0 C, Air (T L ): 20.0 C Measurement: low-temperature boiler Specified system temperatures: Flow (T v ): 70.0 C, Air (T L ): 20.0 C Standard steel panel radiator therm-x2 Δ Standard steel panel radiator therm-x2 Δ Mass flow rate: 64± l/h 64± l/h Standard volumetric flow: 123 l/h 123 l/h Ratio m req. /m des. : 51 % 51 % Flow temperature: 54.1 C 54.2 C Return temperature: 39.3 C 36.7 C C (- 6 %) Average surface temp. front: 42.1 C 48.0 C C (+ 14 %) Average surface temp. rear: 43.8 C 37.6 C C (- 14 %) Mass flow rate: 67±1 l/h 67±1 l/h Standard volumetric flow: 123 l/h 123 l/h Ratio m req. /m des. : 53 % 53 % Flow temperature: 69.8 C 69.9 C Return temperature: 40.7 C 38.7 C C (- 5 %) Average surface temp. front: 49.2 C 59.0 C C (+ 20 %) Average surface temp. rear: 52.4 C 39.5 C C (- 25 %) Standard steel panel radiator therm-x2 Δ q = W/m² q = W/m² + 8 % Standard steel panel radiator therm-x2 Δ q = W/m² q = W/m² + 13 % Average surface temperatures of the front panel: Standard steel panel radiator = 42.1 C therm-x2 = 48.0 C Average surface temperatures of the front panel: Standard steel panel radiator = 49.2 C therm-x2 = 59.0 C Standard steel panel radiator therm-x2 Δ q 12 = W/m² (wall) q 12 = W/m² - 26 % q 12 = W/m² (window) q 12 = W/m² - 23 % Standard steel panel radiator therm-x2 Δ q 12 = W/m² (wall) q 12 = W/m² - 40 % q 12 = W/m² (window) q 12 = W/m² - 38 % Average surface temperatures: Standard steel panel radiator = 43.8 C therm-x2 = 37.6 C Wall = 17.0 C Window = 14.0 C Average surface temperatures: Standard steel panel radiator = 52.4 C therm-x2 = 39.5 C Wall = 17.0 C Window = 14.0 C Conclusion for the evaluations of the actual measurements: W higher average surface temperature of the front panel; therefore higher radiated heat output in the room W lower average surface temperature of the rear panel; therefore significantly lower heat dissipation towards the enclosure surface W larger Δ between flow and return, therefore more heat is emitted to the room 15

16 Evaluation of energy efficiency of the x2 technology using simulation. Model parameters and boundary conditions W Modelling of therm-x2 and equivalent standard radiator in an empty model room with 4.0 m x 5.0 m floor space and height of 2.5 m W Modelling of an exterior wall (4.0 m x 2.5 m) with 18 % window area W Thermal insulation level equivalent to low energy house W Reproduction of radiator type 12 with profiled surface, simplified convection plate and uniform average surface temperature for each panel W Radiator size: length 700 mm (or 1200 mm), height 600 mm based on the heat requirement calculation (outdoor temperature 14 C) W Run static and transient simulations, outdoor temperature 5 C (or outdoor temperature profile), with and without air change, with and without internal loads W Control with reference to 22 C perceived temperature Creating the models for the room and radiator Model of radiator therm-x2 / standard steel panel radiator, type 12, view from the rear Simulation of the following operating states W Static analysis without internal loads W Static analysis with internal loads The radiator model consists of two profiled panels and a convection plate. W Reproduction of a reheating process with two sizes of radiator with modified ventilation W Dynamic investigation of a daily cycle Below are some excerpts from the research report Static observation without internal loads The static simulation without internal loads and without air change produced the following results: Version Controller Q k-a [W] Q s-a [W] Q k-b [W] Q s-b [W] Q tot [W] Q kal [W] Factor [%] Model room with radiator under the window Standard steel panel radiator P therm-x2 P Results of the numerical analyses. Source: Research report of the Dresden University of Technology "Evaluation of therm-x2 radiators by means of simulation" Q k-a = convective heat flow of panel on room side Q s-a = radiant heat flow of panel on room side 26 % higher for therm-x2 Q k-b = convective heat flow of panel on wall side Q s-b = radiant heat flow of panel on wall side 43 % lower for therm-x2 Result Heat demand 9.57 % lower for therm-x2 = higher heating efficiency 16

17 Static observation with internal loads The table shows selected data from the fully coupled calculation for an outdoor temperature of 5 C. Version Controller Q k-a [W] Q s-a [W] Q k-b [W] Q s-b [W] Q tot [W] Q kal [W] Factor [%] Standard steel panel radiator P therm-x2 P Reproduction of a reheating process In the following you will find the results of the reproduction of a reheating process with modified ventilation with regard to the average surface temperatures: Profile of the average surface temperature for the front radiator panel facing the room Selected results of the numerical analyses with room air flow variant with internal loads of 120 W Q k-a = convective heat flow of panel on room side Q s-a = radiant heat flow of panel on room side 51 % higher for therm-x2 Q k-b = convective heat flow of panel on wall side Q s-b = radiant heat flow of panel on wall side 65 % lower for therm-x2 Result Heat demand 6.12 % lower for therm-x2 = higher heating efficiency Results The results show a significant difference between the heat demand of the standard radiator and the therm-x2. For the data shown, the differences amount to 9-10 %. The values for other calculation variants were somewhat smaller, but still approx %. The advantages of the therm-x2 are largely based on the fact that the high radiation component of the front panel becomes effective in the room. Static investigation with internal loads An internal load of 120 W is now continuously applied to the room, along the same lines as the static investigations of an empty room without internal loads. Before the completely coupled calculations were performed with room air flow, a building and system simulation was carried out. This will be used to investigate whether a savings potential can be detected for the x2 relative to the standard steel panel radiator. Temperature [ C] Temperature [ C] Time [min] Profile of the average surface temperature for the rear radiator panel facing away from the room Time [min] W Outdoor temperature a: 5 C W Air change n = 0.0 h 1 W Radiator type 12, length 700 W Internal loads 120 W, modelled as a source acting uniformly on the room, 50 % via convection, 50 % via radiation Summary: The static calculations with and without internal loads show significant energy-saving benefits of the therm-x2 compared to a standard radiator under the assumed boundary conditions. They are in the 5-10 % range. The average surface temperatures of the panels (room-side panel higher, wall-side panel lower) show the significant advantages of the therm-x2. 17

18 Kermi therm-x2 Profile panel radiators therm-x2 Profile therm-x2 Profile-K therm-x2 Profile-K Replacement therm-x2 Profile-V / -VM Universal heating technology with quality guarantee. W With energy-saving x2 technology W Distinctive, profiled look W Wide range of sizes and colours available W Perfectly suited for new buildings and renovation projects W Top cover and side panel standard (Profile -V/-VM). Innovative technology of the future. Distinctive look. In addition to the uniquely innovative x2 technology which reduces energy consumption and increases comfort, the therm-x2 Profile has all the attributes of forward-looking heat distribution in terms of quality and design. This ranges from the high-quality coated, brilliant surrounding covering to the fully integrated valve fitting with factory preset k v values for the valve version. 18

19 For the version with a centre connection, radiator version and dimensions can still be freely determined following the pipe installation. 19

20 Kermi therm-x2 Plan steel panel radiators therm-x2 Plan therm-x2 Plan-K therm-x2 Plan-K Replacement therm-x2 Plan-K / -V Hygiene therm-x2 Plan-V / -VM Unique energy-saving technology with an appealing visual effect. With its brilliantly smooth design, the therm-x2 Plan-K and Plan-V/-VM not only increase well-being and warmth in every room, they can also be harmoniously integrated into almost every room situation. In the V-versions, the valve is integrated and preset at the factory to the appropriate heat output. This not only saves additional energy, but also generally eliminates the need for hydraulic balancing therm-x2 Plan-V and Plan-K Hygiene radiators are the clean solution for special hygienic requirements. For very quick, easily accessible cleaning and almost dust-free room climate. This makes them ideal for allergy sufferers. 20

21 Highly efficient with a smooth design. W With energy-saving x2 technology W Smooth front cover W Wide range of sizes and colours available W Perfectly suited for new buildings and renovation projects For the version with a centre connection, radiator version and dimensions can still be freely determined following the pipe installation.

22 Kermi therm-x2 Line steel panel radiators therm-x2 Line therm-x2 Line-K therm-x2 Line-K Replacement therm-x2 Line-K / -V Hygiene therm-x2 Line-V / -VM Outstanding performance across the entire range. W Attractive design with finely profiled front panel W Wide range of types and sizes W Innovative therm-x2 technology W Perfectly suited for new buildings and renovation projects W Suitable for fitting heating cost recording devices 22

23 Full planning freedom to the very end: For the version with a centre connection, radiator type and dimensions can still be freely determined following the pipe installation. The harmonious connection between efficiency and design. Refreshingly unobtrusive appearance, elegantly slim shape with its finely profiled front surface, the therm-x2 Line fits in all living areas and all furnishing styles. Maximum heat transfer, short heating-up period and high radiated heat output quickly create a pleasant room atmosphere with comfortable temperatures everywhere. In the V-versions, the valve is integrated and preset at the factory to the appropriate heat output. This not only saves additional energy, but also extensively eliminates on-site hydraulic balancing. therm-x2 Line-V and Line-K Hygiene radiators are the clean solution for special hygienic requirements. For very quick, easily accessible cleaning and an almost dust-free room climate. This makes them ideal for allergy sufferers. 23

24 Kermi Verteo steel panel radiators, vertical Verteo Profile / Plan / Line Kermi vertical steel panel radiators State-of-the-art comfort. W With energy-saving x2 technology W In slender upright format W Smooth front section, finely profiled front panel or distinctive profiled look W Wide range of sizes and colours available 24

25 Glossy coating using highquality, environmentally friendly 2-layer coating process. With side cover. Installation ready, specially packed. Quick and easy to install. With multiple top and bottom connection options. Slimline heating technology that saves space and energy. Advanced heating technology in a slender upright format. The space-saving solution for harmonious room integration. With extra smooth front section, finely profiled front panel or in a distinctive profiled look. Equipped with unique, innovative x2 technology for reduced energy consumption and improved comfort. Various heights and lengths. For all heat sources, even for modern heating systems with low flow temperatures: oil, gas or remote heating, solar energy or heat pump. Delivered complete with accessories. 25

26 Kermi radiator replacement Kermi renovation solutions therm-x2 Profile / Plan Compact Replacement radiators Easy radiator replacement and energy-savings. W Fast radiator replacement thanks to hub distances that exactly fit those of the old DIN radiators. W Problem-free, clean, efficient. W Just a few installation steps with no special accessories required. W Available from stock. W Hub distance 500, 900 mm. 500 and 900 mm Kermi therm-x2 Profile Compact and Plan Compact Replacement radiators. The special, quick renovation solutions. In the refurbishment market with its many opportunities, fast, flexible, uncomplicated solutions are in high demand. Kermi therm-x2 Plan Compact and Profile Compact Replacement radiators. Otherwise identical in size to the corresponding Kermi models, they are aimed precisely at the obsolete DIN radiators with the standard 500 and 900 mm hub distances that constitute over 90 % of the demand. For a completely trouble-free radiator replacement in just a few installation steps, without any special accessories. From out-of-date cumbersome energy hog to a modern look and energy-saving technology, from one day to the next. 26

27 Kermi radiation shield Kermi radiation shield For systematic reduction of heat loss through windows. Contemporary design, high quality, convincing in operation: the solution for minimising heat losses caused by window areas elegantly and systematically. Plastic elements on the suspension lugs prevent heat dissipation. This reduces heat loss by up to 80 %. The radiation shield is easy to install on all Kermi radiators on internal or external soil stand brackets. Retrofitting on existing radiators is also trouble-free. 27

28 x-change x-buffer x-center x-net panel heating/ heat pumps heat storage controls cooling systems therm-x2 Design radiators Heating panels Convector steel panel radiators Kermi Decor Healthy, comfortable heat and unlimited showering comfort with the comprehensive Kermi heating technology and sanitary product ranges. Wet floor system Shower enclosures You can find additional information on Kermi GmbH Pankofen-Bahnhof Plattling GERMANY Tel Fax info@kermi.com