The power supply and fan assembly units are identified by the following airflow directions: Intake FRU with an orange "I" label or without any label: Pulls air from the non-port side of the switch and exhausts it out the port side. These units are also identified as/by: Back-to-front (nonport-side to port-side) airflow Fan direction is shown as "Reverse" airflow in the Part numbers ending with Exhaust FRU with a green "E" label: Pulls air from the port side of the switch and exhausts it out the non-port side. Front-to-back (port-side to nonport-side) airflow Fan direction is shown as "Forward" airflow in the The AC powers supplies, fan assemblies, and airflow directions are supported as per the following table: Shipping FRU configuration per chassis Combined AC PSU and fans NA = Hardware is not available and not supported in the current release. The DC powers supplies, fan assemblies, and airflow directions are supported as per the following table:

Combined DC PSU and fans NA = Hardware is not available and not supported in the current release.How to Tell Which Way Air Flows in an Air Conditioning Filter Furnace and air conditioner filters are important devices for helping to remove dust and pollutants from the air in your home, and are often designed to have air flow through them in a particular direction. You need to determine the proper direction in order to obtain optimum filtering and have the longest service life possible for your filter. Improper installation can shorten the life of the filter or make it ineffective altogether. Determine the direction of the air flow. Different systems put the filter in different places, but most commonly it is located in the air return duct. This means that air will be sucked through the filter before entering the mechanical equipment. To determine air flow direction hold a thin strip of paper in front of the duct while it is operating and see which direction the paper is pulled or blown.

Generally the edge of the filter is marked with an arrow which points in the direction of the airflow. In other words, the air travels from the tail of the arrow toward its point. If there is no arrow, the side that is stronger or reinforced by cardboard or wire mesh is the side the arrow should be pointing to. Air flows from the weaker side to the stronger side. Install media filters in either direction. Window air conditioning units often have a media filter that is simply a loosely woven mesh. The mesh fits inside a plastic housing on the inlet side of the unit to prevent dirt from collecting on the cooling coils. Air is drawn through the mesh, then passes through cold coils and is blown back into the room. If one side of the mesh is denser, it should face toward the coils. If both sides are the same it does not matter which direction it faces. Be sure the filter fits snugly so air cannot pass around it rather than passing through it. Improper installation can make the filter worthless or cause it to fail prematurely.

Furnace Filter Care: Which Way Do Furnace Filters Go?starter for ac unitHome Maintenance & Repair; air handling unit functional testingHow to Determine Air Flow Direction for a Furnance Filteroutside ac unit noise An air conditioner takes in room air, cools it and blows it back out into the room, creating an ongoing exchange of... If the duct is channeling air into the air conditioning unit, then the air should point toward the unit, ... How to Add an HVAC Return. ... select a room that is large and unimpeded that will allow the maximum amount of... Changing an Air Conditioner Filter. ... then, what you'll want to do is put it back in the same exact direction, making... How to Tell Which Way Air Flows in an Air Conditioning Filter;

... your home air... How to Determine Air Flow Direction in an Air Conditioner Which Way Should You Place an Air Filter at Home? How to Determine Air Flow Direction for a Furnance Filter Which Direction Does the Filter for a Furnace Go?How to Determine Air Flow Direction in an Air Conditioner An air conditioner takes in room air, cools it and blows it back out into the room, creating an ongoing exchange of air. Determining the airflow of this cycle is important because it helps in positioning air filters, which are crucial for keeping dirt and dust out of the unit. Understanding where the air exits the unit for cooling makes it possible to determine if air flow is sufficient or if there is a problem with the mechanical or other parts of the unit. It’s a simple process to determine the air flow in your air conditioner. Locate the return-air vent. It is usually in the same general area as your thermostat. This is also where the air-conditioner filter is located.

Room air enters the air-conditioning unit at this return-air vent. Notice where the ducts go after the air is cooled. They branch out to the various rooms of the home. Find the registers, or small grates that aim cool air into the rooms. These are at the the ends of the ducts and are usually located in the ceiling or floor. They are smaller than the return-air vent grate. Air leaves the air conditioner at these points to cool the rooms. Air is then sucked into the return duct once again, filtering out dust and dirt. Many air-conditioner filters filter only one way. Install them correctly, following the arrow printed on the filter. The arrow should point in the direction of air flow, that is, the arrow should be pointing toward the unit rather than toward the room. Energy Quest California Energy Commission: How Does an Air Conditioner Work? : How a Central Air Conditioner Works How to Tell Which Way Air Flows in an Air Conditioning Filter How Air Conditioner Ducts Work