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Jonathan Morris
Jonathan Morris

Return To The Air


An air conditioner works by absorbing the warm air and moisture from your home. Once the dampness is separated from the air, your AC unit cools the warm air, and sends it back into your home through the return air vents.




Return To The Air



When air return vents are not working properly, the entire HVAC system suffers. Blocked vents can hinder airflow and cause the system to run inefficiently. Also, improperly placed vents can affect how a building maintains its temperature.


In the infographic to the right, you can see that leaks in return vents are a common duct problem. Not only will this issue make your home less comfortable, but you will likely notice an increase in your monthly energy bill costs.


Homes constructed before the advent of central air often have retrofitted HVAC systems. The earliest HVAC systems featured a large, single return vent placed somewhere in the middle of the home, but this is not the most effective system. Instead, there should be at least one return vent in every room, with two or three being ideal.


Your AC system also comes with a filter that purifies the air before it enters your equipment. A filter on your return duct, therefore, serves more like an additional precaution that helps further clean the air and extend the life of your HVAC system.


Return Air Cans from The Duct Shop are the perfect fitting to use when you need to put a return air register in the wall or ceiling to return the air to your furnace. All Return Air Cans are manufactured from the highest of quality galvanized steel. Sizes listed are the box opening. The back of the cans are flat sheet metal for you to cut the desired size of return air duct into.


AJ Manufacturing produces stainless steel return grilles in our facility in Kansas City for distribution to work sites around the world. Our return air grilles are suitable for commercial use, for clean rooms, and other applications where stainless steel is necessary. Each of our products is hand-assembled for quality assurance and put to the test before they leave our facility.


Contact us to learn more about the application of each of our return air grilles and whether our products will be a good fit for your project. We manufacture a variety of stainless steel return air grilles, using laser cutting and hand-assembly techniques that focus on consistency of size and quality and meet your project deadlines.


A return air grill connects to ductwork that allows air to return to any cooling or heating system. The openings that connect to ducts and other spaces for the returning air are normally covered with grillwork.


Every cooling or heating system will have air being pushed though into rooms and spaces through a system of ducts. This increases the air pressure in the conditioned area and at some time will act to even prevent any further air from entering unless a circulating system is set up to relieve the pressure. This is done normally through return ducts which allow the air to be recirculated or completely vented to the outside in certain cases. A return air grill will cover such ducts, and can also act to regulate the flow of air. They also act to close off the ducts from view. A return air grill also has a filter mounted on it to trap particulate matter and thus ensure that the recirculated air is more pure. This can also in the long run reduce the amount of cleaning required for ducts.


Ducts for returning air are located at floor level or in the walls depending on the design of the system. These require to be covered by a grill that will ensure that duct is protected. It is considered very necessary to use filters over such grills, which in turn can lead to higher efficiency in cooling or heating. The filters in a way also help to reduce air flow and thus help improve efficiency. Such filters can have increased ratings which in turn can reduce allergens and dust and thus make the circulated air more healthy. A return air grill looks very much like the supply side grills and can only be detected with the direction of the air flow in front of the grill. It is necessary that the space around such grills be kept free of any obstruction, as this can affect the entire system. As a matter of fact, it is best to ensure that all grills, whether supply or return, are kept clear and allowed to function as they are designed.


A return air grill and its filter needs to maintained and cleaned at least once every quarter. Such cleaning can also lead to a system functioning with less noise, as a clogged filter can increase the noise level, because of the greater strain placed on the blowers and fans.


Nothing is better than a properly functioning HVAC system. They keep your home or business at a comfortable temperature. While many people know how to operate their HVAC system, very few homeowners actually know how it works. Your air conditionings return air vent is a critical component of an HVAC system. It serves several purposes to the system as a whole and if not taken care of can cause many problems. Not only does a return air vent maintain your buildings air pressure and filter out debris, they can also serve to save you on energy costs and expenses. Here, Fritts Heating & Air discusses return air vents and their importance to your overall HVAC system.


When air return vents are not working properly or blocked, the entire HVAC system stops working efficiently. Blocked vents can hinder airflow and cause the system to run inefficiently. Also, improperly placed vents can affect how a building maintains its temperature. Not only will this issue make your home less comfortable, but you will likely notice an increase in your monthly energy bill costs.


Standard residential stamped return air grille, non-filtered, for wall or ceiling. Brown finish. This grille is flat and does not recess into the hole opening. 1/2\" spaced louvers set at 50 degree angle. Steel construction. Brown Finish


The cleanest air environment can be achieved with a unidirectional (laminar) airflow pattern. Low-level return airflow plays a key role in creating a unidirectional flow pattern in the cleanroom. Unidirectional (laminar) airflow means the air in a designated space is all blowing in a uniformed pattern, in terms of velocity and direction.


Since the unidirectional airflow pattern is used to achieve the cleanest air classes, it's understandable that a low-level air return is important to have in any cleanroom. In order to achieve a unidirectional airflow pattern, you would need to have an air supply on the ceiling and a low-level air return towards the bottom of the room.


Low-level air return will help maintain an equal temperature in the room. Naturally, cold air is heavier and it typically settles towards the bottom of the room. While hot air is lighter and gradually rises to the top of the room. A low-level air return grill will maintain balance between the hot and cold air, resulting in an equal temperature, no matter where you are in the cleanroom.


A good return airflow keeps the room at a maintained temperature. It makes people breathe easy and the room feels warmer. It also keeps away contaminants that can potentially compromise the integrity of the cleanroom.


Air return ducts installed on a low-level or somewhere on the wall promotes better air quality. The air is cleaner, fresher, and cooler if the air return in your cleanroom is installed and working properly. Air returns installed up in the ceiling tend to produce low-quality air due to poor air distribution. Poor air circulation attracts contaminants which defeats the purpose of a cleanroom. Air quality is important in an enclosed space such as the cleanroom. Not only does it prevent contaminants, but it also provides a more comfortable setting for cleanroom workers.


Low-level air return is more efficient than high-level air return if we're talking about air distribution. Hot and cold air mixes when the air return duct is up the ceiling making the room feel hotter.


The air pushes in and out of the air supply efficiently when the air return duct is at a low level. It helps achieve equal air distribution inside the cleanroom which allows good ventilation. Poor air distribution can contaminate the cleanroom which fails to meet the cleanliness specification.


Without the help of low-level air return filtration, you may find that the HVAC unit may become compromised. MERV-rated filtration integrated into the low-level air return prevents biological or product-related impurities from going to the HVAC unit. This aids in improving HVAC usage and efficiency.


Low-level air returns come equipped with filters that prevent any contamination from going out of the room. You might be wondering, what's the point of filtering air that is leaving the cleanroom? There are a couple of reasons that make this important to consider.


When working with pharmaceuticals, it is common for powder to be spread around the room, naturally settling on the floor. With a laminar airflow and low-level air return, these hazardous chemicals are trapped in the air return filtration.


Another factor that is significantly impacted by low-level returns is the maintenance. Since low-level air returns are found at the bottom of the room, it is extremely convenient to replace the filters as part of your regular maintenance of the cleanroom. In fact, modular cleanroom panels can be manufactured with prefab low-level return in the wall and space for grill integrated to make convenient for operation.


This is a brief article to shed light on a problem. The problem is one of semantics, but the consequences are real indeed. Too often the terms return and exhaust are used interchangeably, but they are not the same.


"Return air", usually measured in cubic feet-per-minute (CFM) or its metric equivalent cubic metres-per-hour (CMH), is all the air that is drawn into the dehumidification unit from the natatorium. In an ideal world, all air in the natatorium will circulate well and eventually be returned through the pool dehumidification unit (PDU) for filtration and conditioning. In reality, however, there are usually dead spots in the room, so the return is just pulling a constant volume of air. 041b061a72


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