What are the benefits and downsides to having rigid metal or alumaflex ductwork and which one to choose for the Home AC System?

What are the benefits/downsides to having rigid metal or alumaflex ductwork for Hawaii Home AC?

Ductwork plays an integral role in your home’s air conditioning system, as it distributes cooled or heated air throughout your home. However, ductwork can be of different types, mostly rigid metal and flexible aluminum ducts are common. But should I use rigid metal or flexible aluminum duct in my home?

Understanding the pros and cons of each type will help you make the best decision for your personal situation as per your home’s HVAC installation.

Importance of HVAC Ducting for Home Air Conditioning

When building or remodeling a home, heating and cooling systems are important considerations but it also comprises the ductwork. The AC ductwork is arguably just as important as everything else, but it often goes overlooked.

The job of ductwork is to deliver conditioned air from the HVAC system to where it’s needed in your home. In some cases, alumaflex ducting works better than metal but which one suits your requirements belongs to a thorough understanding of the benefits and downsides.

The benefits of Rigid Metal Ductwork 

Built to last longer:

For those looking for a long-term solution, rigid metal ducts may be the best option as they are more durable than aluminum ducts. Buildings usually install rigid metal ductwork as part of the infrastructure.

Less Maintenance:

These ducts require only periodic inspections after installation but no heavy maintenance. Their sturdy construction prevents them from collapsing or deforming under pressure, so there is little chance that they will need repairs in the future.

Lower airflow resistance:

Rigid metal ducts offer lower airflow resistance than their flexible counterparts, which means less wasted energy in your home. With more efficiency, you can cut down on your power bill while saving money.

Weather resistant:

Rigid metal ducts are more resistant to weather changes than flexible aluminum ducts, so they will last longer in any climate.

The downsides of Rigid Metal Ductwork 

Lengthy and complex Installation:

The lengthy and complex installation process is a drawback, also skilled labor with a bigger timeframe will be required to complete this installation.

Size and Weight:

The weight of rigid metal ductwork makes it a challenge to install. Moreover, extensive mounting infrastructure such as support beams, ceiling joists, or columns is needed.

Expensive Choice:

Because of the metal fabrication and the higher time and labor costs, rigid ducting is more expensive.

The benefits of Alumaflex Ductwork

Flexibility for Confined Spaces:

Alumaflex ducts are flexible, allowing them to be installed in spaces that metal ducts can’t fit in like cabinets, ventilation and wall cavities, etc. These are convenient for late pipeline modification and the position of the air intake and air outlet.

Easier and quick installation: 

Flexible Aluminum ducts are easier to install than rigid metal ducts as they do not require any fittings such as elbows, tees, or reducers which saves time.


The aluminum flex duct is cheaper due to its production process. It has a lower initial cost, a lower cost per linear foot, and a lower labor cost.

The downsides of Alumaflex Ductwork

Less Durable and Strong:

Alumaflex ductwork is not as durable or strong as rigid metal ductwork, which means that they are more likely to scratch and crack over time.

Air Flow resistance:

Alumaflex ducts have a greater airflow resistance, meaning that it takes longer for the air to reach the vents throughout your home.

Can be noisy:

Many people complain that Alumaflex ducts are very noisy, particularly when air is being pushed through them. The sound can vary from being barely audible to loud enough sometimes.

Should I select rigid metal or alumaflex in my home?

In deciding between rigid metal and aluminum ductwork for your home air conditioning system, one cannot be deemed superior to the other. If your budget is less with a low timeframe then you can go for more affordable alumaflex ducting but if you desire low maintenance with durable quality then we recommend going for the rigid metal in order to avoid hefty expenses later on.