What is an air handling unit?
An air handler, or air handling unit (often abbreviated to AHU), is a device used to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. Usually, an air handler is a large metal box containing a blower, heating and/or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to duct work that distributes the conditioned air through the building, and returns it to the AHU. Sometimes AHUs discharge (supply) and admit (return) air directly to and from the space served, without ductwork. Small air handlers, for local use, are called terminal units, and may only include an air filter, coil, and blower; these simple terminal units are called blower coils or fan coil unit. A larger air handler that conditions 100% outside air, and no recirculated air, is known as a makeup air unit (MAU). An air handler designed for outdoor use, typically on roofs, is known as a packaged unit (PU) or rooftop unit (RTU)
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Hi: because your air handling unit is obviously containing your cooling coils which act as dehumidififiers with hot moist air. The moisture these cooling coils extracts from t…he air ends up collecting in these pans and should drain to a safe drainage area via drainage pipe before over filling. In fact! usually their is a safety backup drain and also a safety shut off float for unit shut down for extremely bad luck.. Hope this helps ; Jimiwane
1.cooling coil 2.heating coil 3.fan with motor(blower) 4.filter 5.damper(outside,return air) 6.casing 7.mixing box 8,humidifier
The operating principle of air handling unit is by circulating andthen conditioning air flow. This is achieved by cooling, heatingand ventilating the units.
cubic feet per minute...
Mall Air Handler, Make up Air Unit, and rooftop.
Air handling systems are typically used to recover heat from warm air leaving a facility and using that heat to heat incoming air. In cases where building requirements restric…t any cross leakages between incoming air and air leaving the facility (for example hospitals) a double coil system is used to separate the air. By example: In a winter arrangement, where air has to be heated in a building, the air exiting the building is blown over a coil and heat is absorbed by a liquid such as water or a glycol mix. This liquid is pumped to another coil in the incoming air stream where a second coil heats the incoming air. The arrangement is intended to achieve a physical separation of air streams, while providing a heat coupling between them, and ensuring that this is achieved even in cases where equipment develops leakages.
In most commercial buildings, you need AHU's(Air Handling Units) to supply new air in, and extracting the old air out. using motor fans, filters, and heating and cooling equip…ment
\n\n AHU v/s FCU \n\n AHU and FCU are both included in the HVAC system. The latter is an\nacronym that describes multiple systems of heating, ventilating and air\…nconditioning. AHU, completely known as air handling unit is different from FCU\nor the fan coil unit. \n\n AHUs are usually connected to a central HVAC system whereas an FCU\ncan function or be installed itself. Because of this, it is often the AHU that\nis used to ventilate an entire building whereas FCUs are used in smaller and\noften local spaces only. It is no surprise that AHU is the bigger HVAC system\nnot to mention, the FCU is also regarded as the smaller version of the AHU. In\nthis regard, the smaller FCUs can be called terminal units. \n\n Because of the magnitude of the AHU system, it usually makes use\nof the air from the outside environment. Thus, it treats outside air and brings\nit inside the vicinity with the use of special ducts while an FCU system on the\ncontrary just circulates the inside air. The latter usually does not have any\nduct system thatâs why it is obviously smaller in size as previously mentioned.\nIt is only composed of a simple coil and fan. \n\n Ordinarily, AHUs have certain features that are not present in the\nFCU type. AHUs have several sections for reheating and even humidifying. FCUs\ndonât have sections such as these. Perhaps the only advantage that the FCU has\nover the AHU is that generally, FCUs can also handle water while the AHUs\nbasically handle air. \nMoreover, AHUs can have several fans or blowers installed in its system.\nTraditionally, the AHUâs blowers are placed at the point where the ducts\noriginate or at the terminal end of the air handler unit. FCUs have a different\napproach to blowers. Because of its small size, their fans are usually placed\nwithin the same space as the unit itself. The result is a minor uncomfortable\nnoise that can be heard within the vicinity. This could be regarded as the\nsingle most advantageous flaw of the FCU system. \n\n Summary: \n1. AHU is generally a bigger system than FCU. \n2. AHU is more complex than the FCU and that AHU are often used in bigger\nestablishments or spaces. \n3. The AHU system usually channels air through ducts whereas the FCU donât have\nany ductworks. \n4. AHU system treats outside air while FCUs basically recycle or re-circulates\nthe air. \n5. AHU has sections for reheating and humidifying whereas the FCU does not have\nany. \n6. FCU is often observed to be noisier than the AHU. \n\n \n \n \n\n
Trane, Carrier ,York,Bryant ,Rheem,Ruud, Goodman,Coleman,Amana, etc the list goes on and on.
The difference between an air handling unit and a package unit haveto do with the way air is circulated or cooled. An air handlingunit recycles the air from the structure back… into the system. Apackage unit cools the air as it enters a structure through the useof intake fans.
It should be on the unit or built into a serial number.
If you are talking about the forced air furnace that is in the basement or attic you would need to find the amount of air flow from your air handler (CFM) For every 400 CFM yo…u would need about 1 ton of cooling or 12000 BTU For instance my air handler is 1200 CFM therefore i could handle 3 tons easily. This is a rule of thumb but remember that if your air filter is dirty your air flow will be decreased and could cause possible freezing of the cooling coil or evaporator coil.
In Heating Ventilating and Air Conditioning
A "gas furnace" is called a furnace, an "electric furnace" is called an Air Handler
supplying fresh air at required temperature space that is tfa
In Heating Ventilating and Air Conditioning
to prevent the unit from freezing. Glycol is a an antifreeze agent
air handling units reserculate the treated air at required temperature at any serving area but fresh air unit did not reserculate fresh air , exhaust used air.
Planned Preventative Maintenance schedule of tasks that keep the air handling unit efficient, daily/month/yearly etc.