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Air preheater are liquid and air heat exchanger or exhaust and air heat exchangers. They are designed and carried out individually depending on the application. Air preheater can be performed in counterflow, co-current flow, co-current flow-countercurrent or cross-countercurrent or cross-co-current flow. The design depends on the media and the temperature conditions. 

Medium: air, flue gas, exhaust gases, thermal oil, water, water-glycol mixture, brine, refrigerants, other media with known substance data
Temperature: standard heat exchanger to 560 °C, through special materials also higher
Thermal power: standard air preheater/ air heater up to 10 megawatts (MW), virtually unlimited by combining and special constructions
Materials: carbon steel, stainless steel or special materials
Heat insulation & surface treatment: according to customer specifications
Maintenance: without the installation of the airmaxx4 automatic flue gas cleaner, should, according to the contamination, once or twice a year a maintenance carried out

Air preheater are heat exchanger to preheat or air heating of the combustion air by means of flue gas, steam, water or thermal oil. Air preheaters are used when exhaust temperatures of combustion systems are particularly high. This extracts the hot exhaust valuable energy, which discharged otherwise unused into the atmosphere and warming means of this exhaust heat the combustion air of the combustion process.
In the classical use, air preheaters are connected behind high-pressure steam boilers or thermal oil boilers with a flue gas temperature up to 400 ° C. Their exhaust temperatures lend themselves to preheat the combustion air up to 300 ° C. In this way, an air preheater save up to 10% of fuel costs and thus enables payback periods of less than two years. Meanwhile, air preheater also be used in low temperature ranges in order to make the most efficient use of the fuels and counter the rising fuel prices.
Maxxtec air preheater can be retrofitted easily behind all boiler makes and sizes.