Large domestic market use copper and aluminum composite radiator, light steel radiators, traditional cast iron radiators, now make a specific analysis of the following aspects of the three products: a water quality conditions, copper and aluminum composite Department of the radiator to the introduction of American technology, and use from the 1940s, and also more than 10 years history of use in the country. Copper and aluminum composite radiator water quality is not very strict, all copper tube and heat pipe radiator header, corrosion resistance, no need to do within the anti-corrosion treatment. Therefore, it has a good resistance to alkaline water corrosion. China is now promoting the production of copper and aluminum composite column wing radiator, high alkalinity water quality conditions under the corrosion rate of 0.005mm / analysis, may have corrosion life of 50 years, to leave sufficient room in this condition it could ensure that the service life of 30 years or more. 2 Department of lightweight steel radiators European technology, strict requirements for water quality, ensure the water quality in PH10-12, the oxygen content of ≤ 0.1 mg / L under the conditions of use, otherwise there will be serious corrosion problems, after the end of the heating period, requirements also must be filled with water and maintenance to extend its life. 3, cast iron radiators can be adapted to PH7-12, deoxygenation of water quality, corrosion lighter, but the rust residue more prone to clogging. Material aspects, copper and aluminum composite radiator through the water parts deoxidized copper tube, cooling portion of a new aluminum alloy, brass and aluminum fins closely integrated hydraulic pipe up fully to the copper tube resistance good cooling effect of corrosion and aluminum fins combined into one, so that the products have a corrosion-resistant, heat and fast, high thermal efficiency, energy-saving heating radiator key recommendation of the Ministry of Construction. 2, light steel radiators must be made of cold rolled low carbon steel wall thickness of 1.5mm or more, but one-sided increase in wall thickness and reduce the strength of the metal heat, reduce the heat power and thermal conductivity, heat dissipation is less effective than copper and aluminum composite radiator. Traditional cast iron radiators cast for the recycling of scrap iron and steel from metal heat intensity is low weight, high energy consumption, low power dissipation, contrary to the purpose of the national introduction of energy-saving technologies, is now out of product for the Ministry of Construction. Process, appearance, installation, copper and aluminum composite radiator light and beautiful, the use of safe, simple installation, small footprint. 2, light steel radiators must be strictly within the antiseptic treatment, good prerequisite for internal corrosion must be advanced welding equipment, welding slag, weld flash, no dark seam cracks, must have advanced testing facilities, otherwise there is a leak overall scrapped. And some small manufacturers do not have a full range of advanced welding, the inner corrosion and testing equipment, so that the quality of light steel radiator can not be guaranteed. Cast iron radiators look bulky and complicated to install, many owners have also replaced, causing secondary waste of resources. 4, the cooling effect and the metal heat intensity, copper-aluminum composite radiator both radiation and convection two cooling mode, the water consumption is small, the room temperature equilibrium, the metallic heat intensity around 2.2W/Kg k, a high coefficient of thermal conductivity of copper, aluminum, low thermal inertia, thermal power, relative to the cooling area with the same light steel radiators and cast iron radiators, copper and aluminum composite radiator is 2.5 times higher, on the amount of heat from the heat emission test report issued by the National Testing Center can confirm that, while copper and aluminum composite radiator due to less water consumption, fast warm-up, in line with the national energy saving policy guidelines, a society of new energy-saving heating radiator market applications more a majority of users and Design Institute the product of choice. 2, light steel radiator only surface radiation, water, metal heat intensity 0.7W/Kg k. 3, cast iron radiator needs renovation process, potentially affect the cooling due to its larger amount of water, metal heat intensity 0.3W/Kg k, does not meet the national energy saving policy guidelines. Price, copper and aluminum composite radiator first phase of the installation cost is slightly higher, but pleasing in appearance, without special decoration processing, not cause secondary waste, long service life, the use of maintenance costs low, maturity scrap value high, and therefore lower overall costs. 2, the light steel radiator single column price is slightly lower, pleasing in appearance, but the larger amount of water, relatively bulky, short life in the copper and aluminum composite radiator, high maintenance costs, the comprehensive cost than copper and aluminum composite radiator. 3, the first phase of the cast iron radiator lower installation costs, but bulky shape, roughness, must be renovated to handle conceal cause secondary waste of resources, high maintenance costs, and now users to choose these products rarely. VI Conclusion In summary, copper and aluminum composite radiator relative to the light steel radiators and cast iron radiators, corrosion resistant, long life, fast heat transfer, high pressure, environmental protection and energy saving, attractive appearance, ease of installation and maintenance Characteristics, applications is heating radiator industry selected a larger amount of product. Beijing a new generation of brand radiator dealer Contact: Taoze Feng Tel: 13264323810 toll-free hotline: 4007005525 copper and aluminum composite radiator: http://zhongjiakangnuo.b2b.hc360.com/ radiator Price: http://nuanqipian1.zk71.com / radiator top ten brands: http://shenglaolunsi.wanye68.com/ Address: Beijing Daxing District Chong intersection Crystal Square 12-storey radiator Reseller Company