An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.The basic function of the AHU is take in outside air, re-condition it and supply it as fresh air to a building. All exhaust air is removed, which creates an acceptable indoor air quality. Depending on the required temperature of the re-conditioned air, the fresh air is either heated by a recovery unit or heating coil, or cooled by a cooling coil.In buildings, where the hygienic requirements for air quality are lower, some of the air from the rooms can be re-circulated via a mixing chamber and this can result in significant energy savings. A mixing chamber has dampers for controlling the ratio between the return, outside and exhaust air. The AHU is a large metal box containing separate ventilators for supply and exhaust, heating coil, cooling coil, heating/cooling recovery system, air filter racks or chambers, sound attenuators, mixing chamber, and dampers.

AHUs connect to ductwork that distributes the conditioned air through the building, and returns it to the AHU.A heat/cooling recovery exchanger is normally fitted to the AHU for energy savings and increasing capacity.An AHU designed for outdoor use, typically on roofs, is also known as a rooftop unit (RTU).Emerson Network Power > United States > Products > By Type > Thermal Management > Air Handlers > Liebert Custom Air Handling Units Free-Cooling Direct and Indirect Evaporative Systems Liebert Custom Air Handling Units, Data Sheet, (R03/15) (SL-19700) Liebert Indirect Evaporative Freecooling Unit, Data Sheet , (R06/15) (SL-19711) Liebert Chilled Water Air Handler, Data Sheet , (R06/15) (SL-19712) Liebert Direct Expansion Air Handlers, Data Sheet, (R06/15) (SL-19713) Liebert Direct Evaporative Freecooling Unit, Data Sheet, (R06/15) (SL-19714) View Customer Success Green House Data Video View Maximize Efficiency and Whitespace Video View Competitive Advantage of Cooling Efficiency Video

Liebert Custom Air Handling Solutions offering maximum flexibility with industry best efficiency, availability and service support leveraging 40+ years of data center experience. Liebert Indirect Evaporative Freecooling Unit PUE < 1.2 with minimal water usage Highly efficient aluminum air-to-air heat exchanger offers up to 66% efficiency dry and 78% efficiency wet Supplemental DX or chilled water options available for trim cooling requirements Liebert Direct Evaporative Freecooling Unitportable ac units made in usa PUE < 1.1 with minimal water usageportable a/c unit for vehicle DX or chilled water secondary cooling options sized for full or trim coolinggoodman ac parts dealer EC or direct drive fans with VFD options arranged in single or fan array configurations

Liebert Chilled Water Air Handler Optional air economization for optimum efficiency Liebert DX Air Handler High quality, highly efficient rooftop DX solutions specifically designed for data centers Configurations incorporate outside air economization, variable capacity compressors, bypass dampers, and evaporative condensers High-strength thermal-break construction with 2” foam-injected walls, doors and flooring providing an R-value of R12 for greater efficiency and durability Standard Casing Ratings DLC of 5.0 Panel deflection of L/250 Frame and removable panel design allowing for service or replacement of large internal components Welded or bolted-base construction for high durability and strength Standing-seam roof construction eliminating water infiltration Optional 4” enhanced casing offering greater energy efficiency with an R-value of R24 and additional acoustical and corrosive environment protection alternatives Leakage rate of less than 1% at 10”

Panel deflection of L/400 at 10” With Proper Maintenance, Unit Construction Engineered to Last Over 30+ YearsEC and Direct Drive Fans with VFD arranged in individual or fan arrays Variable & Digital Compressors High Efficiency Aluminum Air-to-Air Heat Exchanger – up to 66% efficiency dry and 78% efficiency wet Multi Stage Direct Evaporative Media Optional Evaporative CondenserLiebert® Custom Air Handling UnitsSpecifications table 25,000 – 80,000+ CFM Indoor Unit – Downflow, Upflow, & Horizontal Airflow 20,000 – 80,000+ CFM Data center, gallery, rooftop or external building perimeter 150 – 400+ kW 20,000 – 60,000+ CFM Rooftop or external building perimeter Rooftop or building perimeter Customer Success Green House Data YORK® Solution Air Handling Units Not every HVAC system is created equal.  With the YORK® Solution Air Handling unit, you can have flexibility without having to start from scratch. 

Get the most out of your HVAC system, work with the industry’s leading HVAC company. Mass Customization – Air handling units deliver custom-like performance and flexibility as well as being faster and more economical than was previously possible Design Flexibility – Offers variable-aspect-ratio sizing, plus a wide range of component / material choices Faster Delivery – Sophisticated computer engines speed-up the custom-manufacturing process of Johnson Controls air handler units Flexible Factory-Packaged Controls – No more limited control configurations. Designers can now customize them to meet application requirementsA clear explanation, with diagrams, of how a central air conditioner cools a house by cycling refrigerant through its system. A central air conditioner has a primary appliance such as an air handler or furnace located in an out-of-the-way place such as a basement or attic. This appliance pumps chilled air throughout the house through a system of air ducts—often the same system utilized by a forced-air furnace during the heating season.

One or more thermostats in the house turn the cooling system off and on as room temperatures rise and fall. A central AC runs on electricity and removes heat from air with basic refrigeration principles. When the thermostat signals the air-conditioning system to lower air temperature, a whole sequence of events begins. The air-handling unit kicks on, drawing room air in from various parts of the house through return-air ducts. This air is then pulled through a filter, where airborne particles such as dust and lint are removed—in fact, sophisticated filters may remove microscopic pollutants as well. Then the air is routed to air-supply ductwork that carries it back to the rooms. But how does the evaporator coil get cold in the first place? That is where refrigeration principles come into play. Every air conditioner has three main parts: a condenser, an evaporator, and a compressor. With a typical “split system,” the condenser and the compressor are located in an outdoor unit;

the evaporator is mounted in the air-handling unit, which is often a forced-air furnace. With a “package system,” all of the components are combined in a single outdoor unit that may be located on the ground or on the roof.) Refrigerant such as freon circulates through copper tubing that runs between these components. This refrigerant receives and releases heat as it raises and lowers in temperature, changing from liquid to gas back to liquid. The refrigerant is especially cold when it begins to circulate through the indoor coil. As the air handler pushes warm air across the coil, the refrigerant absorbs so much heat from the air that it turns into vapor. As a vapor, it travels to a compressor that pressurizes it and moves it through the outdoor coil, which jettisons the heat. A fan also helps to dissipate the heat. The refrigerant then passes through an expansion device that converts it to a low-pressure, low-temperature liquid, which returns to the indoor coil. And so the cycle goes.