Which Type of Pipe Is Best for HVAC Systems?

Most HVAC systems use a mix of ductwork and piping to efficiently condition air. The material used for these systems affects their functionality. Here, we explore which type of pipe is best for HVAC systems so you can make an informed choice for your home.

Copper Pipes

If you can afford copper pipes, they’re an excellent material to consider for your HVAC system. This high-quality metal is strong, corrosion-resistant, and energy-efficient. When these pipes transport refrigerants in air conditioning systems, they maintain the liquid’s temperature for maximum effectiveness. Copper isn’t cheap, but if you’re interested in a highly effective, long-lasting pipe for your HVAC’s coolant system, then it’s the right material for the job.

PVC Pipes

Polyvinyl chloride (PVC) is a popular material for HVAC drain lines, primarily due to its affordability and ease of installation. Relatively lightweight and resistant to moisture, PVC pipes are excellent for draining condensate and preventing the build-up of mold or mildew. They are popular for under-floor piping because of this moisture resistance.

However, something that’s important to know before using PVC pipes in HVAC systems is that they’re not the most durable or tolerant of extreme temperatures. Therefore, they tend to have shorter lifespans than metal pipes and should not be used for high-temperature applications.

Galvanized Steel Pipes

Galvanized steel pipes are less common today in residential HVAC systems, but they’re still seen in older homes and industrial facilities. These pipes are strong and durable; they can handle high pressure and heavy loads.

However, even though galvanized steel is technically corrosion-resistant and does last longer than uncoated steel, it’s not as hardy as plastic or copper pipes.

Flexible Duct Pipes

For duct systems, flexible aluminum or plastic pipes are frequently used. These pipes are super lightweight and, as the name lets you know, flexible. They can effortlessly bend and carry air to all parts of your home.

You cannot use flex duct for transporting coolants; it is strictly for ductwork. Additionally, installation must be careful, as any oversights might lead to kinks and blockages in the system, which will restrict airflow.

PEX Pipes

Cross-linked polyethylene pipes, known as PEX pipes, have risen in popularity for modern HVAC installations. Resistant to heat and pressure, PEX pipes are highly durable and versatile. They’re often used for hydronic HVAC systems, such as underfloor heating or radiant heating. Ultimately, PEX is a lower-cost alternative to copper that doesn’t compromise on performance.

Which Pipe Should You Choose?

The “best” type of pipe for HVAC systems depends on the specific system application and budgetary constraints. It’s quite possible to use a mix of materials (i.e., copper for coolant delivery but PVC for drainage). In the end, you should consult several HVAC professionals to get a variety of opinions and use this information to guide and inform your choice. Choosing the right pipe helps maximize the efficiency and lifespan of your system, and it will impact how much HVAC maintenance you perform. So take the time to make a good decision!