Residential furnace and air conditioner installation, maintenance and repair.

Carbon and graphite for industrial purposes, particularly carbon and graphite in the form of pieces or in granular or powder form, particularly as carbonizing agents, agents for diamond synthesis, filter materials, absorption substrate, catalyst carriers, carbon-containing and/or graphite-containing mixtures with tar, pitch, synthetic resins (unprocessed) or other binders for commercial purposes, particularly as carbonizing agents in metallurgy, for the production of electrodes for electric furnaces and for the productions of mouldings and linings moderator, reflectors and structural parts for nuclear reactors consisting of carbon or graphite or of carbon reinforced with carbon fibres graphite salts, intercalation compounds of graphite for industrial purposes, particularly for the production of expanded graphite expanded graphite as bulk material or loose material, particularly for the production of graphite foils, graphite laminates, packings, sealing materials, heat insulating materials, heat accumulators and heat conducting materials, parts and components for machines and parts for mechanical appliances, particularly for the metal, wood, plastic, paper, leather, artificial leather processing industry, chemical and pharmaceutical industry, food-producing and processing industry, textile, glass and ceramic, building, paper, printing industry, agriculture and forestry, mining and the extraction of petroleum and natural gas, the industry producing vehicles, apparatuses and machines for transport on land, in the air, on rail and on water, the purification and keeping pure of liquids and gases, parts for machines and appliances for conveyance of bulk materials, cranes, lifting appliances and hoists, robots, engines and clutches (except engines and clutches for land vehicles), gears, step-up and step-down transmissions, mechanical controls, lubricating apparatuses, packaging and labelling machines, pumps, slides and valves (as machine parts) steam generators (as machines parts) presses (machines), slide-ring seals, domestic appliances, kitchen machines, armourings and armour plates, frictions linings, linings for clutches and brakes, brake disks, bearings, cylinders, roller, bursting discs, sealing rings, isolating slides, particularly for pumps heat exchangers, all the above mentioned goods consisting of carbon or of plastic reinforced with carbon fibres or of a material from the above mentioned group, coated with a ceramic or metallic material, or of carbon bound with plastic or of sintered metal or of silicon carbide or of pyrocarbon or of pyroboronitride or of carbon impregnated with synthetic or natural resin or with metallic materials, graphitic forms of carbon in each case included, containers lined with rubber or plastic and apparatuses consisting of metal, brushes, contact pieces, including sliding contacts for the transmission of electrical currents, consisting of carbon, of carbon reinforced with carbon fibres, of plastic reinforced with carbon fibres, of carbon bound with plastic or of metal-containing carbon, graphitic forms of carbon in each case included, parts for scientific, navigational, surveying, electrical, photographic-film, optical, weighing, measuring, signal checking, life-saving, educational and laboratory apparatuses, appliances and instruments, for appliances fo the generation, amplification, transmission, reception, recording and reproduction of electro-magnetic and sound waves, for vending machines and mechanisms for coin-operated apparatuses, cash registers, calculating machines, data-processing appliances and computers as well as fire extinguishers, for analysers, appliances for atomic absorption spectrometry, atomic emission spectrometry, X-ray fluorescence spectrometry appliances for voltametry, ammetry and electrosynthesis, for appliances for ion implantation, plasma etching, electron-beam evaporation, epitaxy, zone melting, for electrical batteries, accumulators, fuel cells, experimental furnaces, electrolysis systems, rectifiers, spark-erosion appliances, welding appliances, lightening-protection and electrochemically acting corrosion-protection systems, microscopes, manipulators for inaccessible zones, for example in nuclear, chemical or high-temperature technology, filters for breathing masks, distilling, extracting apparatuses, dedusting systems and appliances, consisting of carbon or of carbon reinforced with carbon fibres or of one of the above mentioned materials, but with a coating of pyrocarbon, pyroborinitride or silicon carbide, or of silicon carbide or pyroboronitride or pyrocarbon or of plastic reinforced with carbon fibres or of carbon bound with plastic or of carbon impregnated with a synthetic or natural resin or with a metallic material or of sintered metal, graphitic forms of carbon in each case included, electrodes for electrical and electrochemical purposes, particularly for electric furnaces and electrolysis systems, consisting of carbon, of carbon reinforced with carbon fibres of carbon impregnated with synthetic or natural resins, of carbon with synthetic resins, silicon carbide, pyrocarbon, graphitic forms of carbon in each case included, linings for electrolysis systems consisting of carbon and/or graphite, of carbon or graphite impregnated with synthetic or natural resins, crucibles, boats, pipes, tubs, powders, for use in laboratories and assays during operation, consisting of carbon or graphite, of carbon or graphite reinforced with carbon fibres, diaphragms, counter electrodes, electrical brake pieces, grit for telephone systems, components for electrical resistors, particularly rings, wafers, grit, parts for use as electromagnetic shields consisting of carbon of carbon reinforced with carbon fibres, of plastic reinforced with carbon fibres, of carbon bound with plastic, of carbon impregnated with synthetic or natural resins, of silicon carbide, graphitic forms of carbon in each case included, parts consisting of electrically conductive plastic, of carbon or graphite bound with plastics, carbon fibres included, parts and components for use in the production and processing of materials and parts consisting of high-purity substances, particularly for semiconductor technology, computer technology, solar technology, optical-fibre technology, such as heating elements, material and heat shields, supporting crucibles, susceptors, electrodes, contact pieces, drawing bars, boats, crucibles, saggers, casting moulds, saw backings, wafer carriers, soldering and fusion moulds consisting of carbon or of carbon reinforced with carbon fibres or of one of the above mentioned materials, but with coating of pyrocarbon, pyroboronitride or silicon carbide, or of pyrocarbon, pyroboronitride, silicon carbide or of plastic reinforced with carbon fibres or of carbon bound with plastic or of carbon impregnated with a synthetic or natural resin, graphitic forms of carbon in each case included, radiation windows and tables for apparatuses and appliances for X-ray diagnosis and radiation therapy consisting of carbon or of silicon carbide or of carbon reinforced with carbon fibres or of plastic reinforced with carbon fibres, graphitic forms of carbon in each case included, prostheses, medical implants, consisting of carbon or of carbon reinforced with carbon fibres, graphitic forms of carbon in each case included, structural parts for use in medical apparatuses and instruments consisting of carbon or of carbon reinforced with carbon fibres or of one of the above mentioned materials, but with a coating of pyrocarbon, pyroboronitride, silicon carbide, or of pyrocarbon, pyroboronitride or silicon carbide, or of plastic reinforced with carbon fibres or of sintered metal, or of carbon bound, with synthetic resin, graphitic forms of carbon in each case included, parts for dental technology, particularly melting and casting crucibles and moulds, consisting of carbon or graphite, forms containing carbon fibres being included; machines and apparatus for the chemical industry, in particular hydrogen chloride synthesising installations and hydrogen chloride synthesising installations connected to a steam generating installation parts for heat generation and for furnaces, heating elements, heating plates, heating strips, heating pipes, heating bars, contact pieces, fittings, charging structures, linings, parts for heating systems and apparatuses with heating surfaces, cooking apparatuses and cooking systems, cookers, electric cooking appliances, parts for evaporators, steam-generating plants, hot-air, apparatuses, ventilation and air-conditioning systems, air-filter and gas-filter systems, gas scrubbers, gas-purification systems, dedusting systems, drying apparatuses, cooling systems, distilling and extracting systems, heat exchangers, seawater desalination plants, nuclear reactors, plumbing appliances and water conduits appliances, particularly carbon pens and carbon electrodes, consisting of carbon and/or graphite or of carbon reinforced with carbon fibres or of plastic reinforced with carbon fibres or of carbon bound with plastic or of pyrocarbon, or of carbon impregnated with synthetic resin, natural resin or a metallic material, in the case of all the above mentioned materials, graphitic forms of carbon in each case included, or of one of the above mentioned materials, but with a coating of a ceramic or metallic materials, but with a coating of a ceramic or metallic material or of silicon carbide, pyroboronitride or of graphite foils or graphite laminate, plants and components for chemical process technology, particularly heat exchangers, consisting of carbon or graphite impregnated with synthetic or natural resin and of metal parts lined with plastic or rubber, particularly steel parts, or of carbon or graphite, electrodes for electrical and electrochemical purposes, particularly for electric furnaces and electrolysis plants, consisting of carbon or of carbon reinforced with carbon fibres or of carbon bound with plastic or of carbon impregnated with synthetic or natural resin, graphitic forms of carbon in each case included; parts of vehicles, apparatuses and machines for transport on land, on water, in the air, on rails and of devices for aeronautics, including parts for engines and clutches for land vehicles, particularly friction linings, pumps, bearings, mountings, seals consisting of carbon or of carbon reinforced with carbon fibres or of plastic reinforced with carbon fibres, or of carbon bound with synthetic resin or of carbon impregnated with synthetic resin or of carbon impregnated with synthetic resin or natural resin, fibre-containing forms included, or of pyrocarbon, in the case of all the above mentioned materials graphitic forms of carbon in each case included, or of sintered metal or of silicon carbide, or of graphite foils or graphite laminates, brushes, contact pieces, including sliding contacts, for the transmission of electrical currents consisting of carbon or of carbon reinforced with carbon fibres, or of plastic reinforced with carbon fibres or of carbon bound with plastic or of a metal-containing carbon or graphite, graphitic forms of carbon in each case included, all goods, components and semi-finished products for sealing purposes, particularly seals, packings, sealing cords, sealing twines or sealing strips, plates and other preliminary products for the production of seals, consisting of carbon or of carbon reinforced with carbon fibres or of plastic reinforced with carbon fibres or of carbon bound with plastic, graphitic forms of carbon in each case included, or of graphite foil or graphite laminate, compounds and cements for sealing and insulation, consisting of mixtures of carbon and/or graphite and/or carbon fibres or graphite fibres as fillers and tar and/or pitch and/or synthetic resin as binders, heat shields and heat-insulation means consisting of fibrous and on-fibrous carbon and/or graphite, particularly of graphite foils, graphite laminates, expanded graphite or of graphite reinforced with carbon fibres, semi-finished products for brake disks, semi-finished products for friction linings and semi-finished products for the production of friction linings, particularly of clutch linings and brake linings, consisting of carbon, of carbon reinforced with carbon fibres, of plastic reinforced with carbon fibres, of carbon bound with plastic, graphitic forms of carbon in each case included, fibres, threads, bulk fibres, wadding, wool, felts, slivers, woven fabrics, knitted fabrics, braidings consisting of carbon and/or graphite, not for textile purposes, graphite foils and graphite laminates, not for packaging purposes, web and compound consisting of rubber and plastic for the lining of containers, pipes and appliances or of parts thereof and for the covering of surfaces, semi-finished products in the form of plates, blocks, tubes, longitudinal profiles, foils for the production of apparatuses, appliances and parts for the production and processing of semiconductors, high-purity substances and for use in laboratory technology and analysis technology, particularly for processors, computer technology, solar technology, optical-fibre technology, spectrometry, consisting of carbon or of carbon reinforced with carbon fibres or of one of the above mentioned materials, but with a coating of pyrocarbon, pyroboronitride, silicon carbide or of pyroboronitride, pyrocarbon, silicon carbide or of plastic reinforced with carbon fibres or of carbon bound with plastic, in the case of the above mentioned materials, insofar as they contain carbon, graphitic forms of carbon included; all aforesaid goods; binders consisting of tar, pitch or synthetic resin or of mixtures of two or more of the above mentioned materials, consisting of tar and/or pitch and/or synthetic resins as binders and carbon and/or graphite, fibrous forms included, as fillers; manufactured goods for building purposes, particularly beams, boards, perforated and/or profiled boards, blocks, bars, tubes, cylinders, hollow cylinders, longitudinal profiles, profiled strips, building bricks, particularly refractory bricks, partition walls, supporting structures consisting of carbon, of carbon reinforced with carbon fibres, of plastic reinforced with carbon fibres, of carbon bound with plastic, of carbon impregnated with synthetic or natural resins, graphitic forms of carbon in each case included, or of silicon carbide, cement compounds and cements as well as compounds for the production of corrosion-proof or refractory linings consisting of tar and/or pitch and/or synthetic resins as binders and carbon and/or graphite, fibrous forms included, as fillers casting moulds, runners, casting dies consisting of carbon or graphite, semi-finished products in the form of blocks, boards, bars, tubes, longitudinal profiles consisting of carbon, of carbon reinforced with carbon fibres, of plastic reinforced with carbon fibres, of carbon impregnated with tar, pitch, synthetic or natural resins, of carbon bound with plastic, graphitic forms of carbon in each case included, or of silicon carbide; fibres, threads, twines, cords, bulk fibres, felts, slivers, woven fabrics, knitted fabrics, braidings, tapes, for textile purposes consisting of carbon and/or graphite, silicon carbide or other non-oxide ceramic fibers, filters consisting of wadding, wool, bulk fibres, felts, woven fabrics, tapes consisting of carbon and/or graphite, silicon carbide or other non-oxide ceramic fibers.