Quick Answer: What Happens If There Is Not Enough Return Air?

Why is my house so dusty?

Dust accumulation in your home is a product of airflow, either because too much dirty, dust-filled air is floating around your home or because not enough air is spreading through the home, allowing dust to settle..

Why is return air important?

As conditioned air is pushed in, the air already in the home needs a place to escape. Return air vents serve this purpose by helping to pull in the air and putting it back into the system. This is what maintains proper air pressure in a home.

Does every room need return air?

Your Home Might Not Have Enough Return Vents Having several return vents (ideally one in every room, but even two or three is better than just one) creates consistent air pressure. If you have one return vent, your home is fine. Keep the doors to each room open so air can properly circulate.

How big of a return air do I need?

Large Returns There typically are as many supply vents as there are rooms in a house. There usually are fewer return vents, but they are much larger. A typical supply vent is 4 by 10 to 12 inches and a typical return vent is 16 by 20 inches or larger.

Why is cold air coming out of my return vent?

If cold air is seeping into your ductwork, it must blow out of the duct registers before the furnace’s warm air can—thus it feels like air-conditioned air is ventilated through your home despite the thermostat being set to heat at 72-degrees.

Can flex duct be used for return air?

Flex Duct on Return Air Diffusers – Yes or No? scientific reason – atmospheric dust (abrasive) traveling at 600 FPM will erode the heels of turns (elbows) rendering the flexible ductwork totally useless, after only 2000 years of continuous service.

How can I increase the airflow in my room?

5 Ways to Improve Airflow in Your HomeCheck Vents and Registers. One of the simplest things you can do to increase airflow in your home is to check the vents and registers in each room. … Turn on Ceiling Fans. Another simple solution for improving airflow is to turn on your ceiling fans. … Schedule HVAC Maintenance. … Consider Duct Cleaning. … Invest in a Ventilator.

How do you increase return air flow?

3 Simple Ways to Improve Your Furnace’s Airflow for More ComfortUnblock and clean your vents. Here’s a super easy way to increase air flow. … Change your filters and clean your return grill. A dirty air filter impedes air movement and makes it hard for your furnace to work efficiently. … Seal leaky ductwork. Snap on some goggles and a dust mask, it’s time to check out your air ducts.

How do I know if my return air is working?

You can identify return vents by turning on the system fan and holding your hand or a piece of paper up. If the paper is pulled toward the vent or you feel a suction effect, it’s a return vent.

Can I block a return air vent?

Very similar to blocking a heat register, blocking an air return vent restricts the air flow in your home. Blocking air return vents causes your system to work harder, as there is less air flow to move the air back to the furnace.

Why do you need return air?

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. … Return air vents pull in the air so your AC system can pump out conditioned air.

Can you have to much return air?

While there is no such thing as too much return air for the equipment (actually, there is, and it causes fan cavitation, but very rare), this CAN be an issue for the house. It has the potential to throw off pressures in different areas of the house.

Should there be a filter in the air return?

Do not put filters in your supply vents. Your AC system should have a proper fitting filter on the return side. By placing a good fitting, high quality filter on the return vent, you will remove particles from the air before they can enter the AC system.

Where should air returns be located?

The Location of Cold Air Return VentsExamine your home heating system. … Place your cold air return vents on the inside walls of buildings at the lowest point. … Place the vent at least 10 feet away from a thermostat, because the cold air draft may cause incorrect temperature readings.More items…

Should return duct be larger than supply?

In a basic ductwork configuration, there should be at least one return grille per floor of living space. Return grilles may be located on the floor, wall, or ceiling, and are generally larger than the supply registers.

What happens if you put an air filter in backwards?

By installing your filter backwards, air will have a harder time flowing through the filter and your air handler will have to work harder to make up for the loss of airflow. … That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.

What is the difference between supply and return air?

The supply vents in your home blow conditioned air out into your rooms. This air travels from your heating and cooling system, through your ductwork and out of the supply vents. … The return vents in your home suck the air from your rooms into your return ducts and back to your heating and cooling system.