Nov 16, 2022 · Return air ducts are air passageways that pump air out of a room and into an HVAC system. Once the air is returned to the HVAC system, it will be re-heated or re-cooled and then sent back into the home through a supply duct.

Sep 28, 2022 · Beyond temperature control, return air vents help improve air quality. If a return air vent is equipped with a filter, it effectively captures dust, pollen, pet dander, and other airborne particles. This is especially beneficial for individuals with allergies or respiratory issues.

The main purpose of a return air vent is to suck the air in your home back into the HVAC components. This is pretty much recycling the air in your home. Once it is heated, or “conditioned”, the air goes back in your home’s living space via duct work that ends at …

Jul 19, 2024 · Air return vents, also known as return air grilles or cold air return vents, return the conditioned air via the return air ducts to the furnace, air handler, or packaged system. This starts the heating and cooling cycle over again.

Jan 29, 2024 · Supply air is the air pushed into your home from the air ducts. Return air is the air pulled back into the ducts. You’ll feel a breeze by a supply vent (but not by a return vent). There's no such thing as too much return air.

Jul 12, 2024 · Air conditioning ducts are sized based on how much airflow your HVAC unit has. Generally, we can estimate the airflow of an HVAC unit based on 400 cubic feet per minute (CFM) per ton. So, if you have a 2-ton unit, the airflow will be around 800 CFM.

Dec 5, 2024 · Supply vents operate under positive pressure, pushing air into rooms, while return vents work under negative pressure, drawing air from rooms back into the HVAC system. In essence, return vents function like a vacuum, channeling air back to the unit.

Apr 13, 2019 · What is the purpose of a return air vent? The main purpose of a return air vent is to maintain air circulation and allow air to return to your AC system to be heated or cooled. Your AC system works by recirculating the air in your home while also conditioning it.

Jul 22, 2022 · The flex duct sizing chart and round duct sizing chart below are used by HVAC technicians, handyman services and homeowners to quickly select a supply duct size and return air duct size for each section of your ductwork design.

Mar 25, 2025 · AHUs handle five key air streams: fresh, return, mixed, supply, and exhaust. Each stream plays a role in air quality, energy use, and comfort. ASHRAE standards guide minimum ventilation and energy recovery.