If this is happening to your system than there are cheap ways to boost the air flow.
Option to Get More Air Though Duct Work
- Option #1 Speed Up Blower Motor
- Option #2 Booster Fans
The air flow through the duct-work is created by the blower motor within the A/C unit.
Many blower motors have different speeds they can run at depending on how they are wired.
The installers may have known that the system was under performing and already set the blower motor to run at max capacity, but it may be worth looking to see if it is.
Booster fans work by fitting an extra fan into the system giving it an extra boost.
There are different styles from a return grill type fans, to a fan that is put in the duct work to pull more air.
There are several different types with our favorite options below.
As always be sure to read reviews on Amazon, here, or elsewhere to be sure a unit is the right pick for you.
*This post contains affiliate links.
Here Are The Four Most Common Types Of Air Boosters.
- Suncourt Flush Fit Register Air Booster Fan
- Heating Air Conditioning Booster
- Tjernlund RB10 Register Booster Fan
- VenTech DF6 Duct Fan
Suncourt Flush Fit Register Air Booster Fan – HC500-W – White
This type of booster is made to fit into the register also called the Return Air. This is where air is pulled from a home back to the A/C unit for cooling or heating.
The right sized dimension would be needed to fit or one would have to be retro fitted into place.
This is one of the best option as long as the return air doesn’t have some strange dimensions. Making it fit (retro fitting) or placing it on top of the existing Return Air is always a option.
Heating & Air Conditioning Booster
This type of A/C air booster simply sits on top of the return air and has a powerful fan that pushes air into the system.
This type is the easiest to setup and is a quick easy fix. It may not be a long term solution though since it is not fitted into place.
Tjernlund RB10 Register Booster Fan, Fits 4″ x 10″ Register
This type is can be used at the register or since its small size fitted to a vent in a room that needs a boost.
For example, this one has the dimensions of 4 X 10, so any vent with these dimension could have this placed in to get more air flow.
VenTech VT DF-6 DF6 Duct Fan, 240 CFM, 6″
This air booster is fitted into existing duct work which can dramatically boost the air flow.
It will require cutting the duct in the attic or where accessible and fitting it in the system.
This is most likely the best option but does require more work. If you are not a handy person another option may be better.
Any booster that is used will also need a power source which depending on the home layout may or may not be a problem.
A home that has a under performing air flow most likely need the duct work looked at and possibly redesigned and replaced.
Of course replacing a home duct work is an expensive undertaking.
Hopefully one of the options above will work for your A/C unit and give the air flow needed without having to spend the time and money on new duct work.