Are You Looking for a Replacement AC Duct Board? What You Should Consider

  • Post comments:0 Comments
  • Reading time:7 mins read


When shopping for a replacement AC duct board, it can be easy to get overwhelmed. It’s important to understand what you’re looking at so you can narrow down your choices and find the best product for your needs. When replacing AC duct board, there are five categories of information about the product that will help you make an informed decision: pressure loss, sound transfer, moisture and corrosion resistance, chemical resistance and thermal conductivity (also known as insulation value). To get started, let’s talk about what an AC duct board is.

What Is AC Duct Board?

AC duct board is a type of insulation that is used in homes to insulate air conditioners. It consists of two layers: a foil layer and a paper layer. The foil layer prevents heat from escaping through the ducts, while the paper layer helps keep moisture out so that it does not damage your AC unit. This can also help prevent mold growth inside your home’s air duct system.

The main benefit of using AC duct board is that it keeps temperatures low by preventing heat from escaping into other parts of your home during winter months or hot summers when you want to turn on your heating or cooling system. This means lower energy bills!

Some common applications for this product include:

  • Insulating existing central heating systems
  • Insulating existing ventilation systems

Pressure Loss

Pressure loss, also known as flow resistance, is the measure of a duct’s ability to allow air to pass through it. A high pressure loss will negatively affect your HVAC system’s efficiency and overall performance.

Pressure loss is a function of the duct’s dimensions (length and diameter), material, and length. It can be calculated by using the following formula: P = L x D^2 * R/100. In English: The pressure in kPa (kilopascal) that you feel when you put your finger on one end of a piece of pipe with an open end (i.e., no cap on either end) equals its length in meters squared times its diameter squared divided by 100 times whatever resistance happens to be inside that pipe at any given point along its length (or between two ends).

It may seem like there are too many variables at play here but don’t worry–you don’t need to do any math beyond calculating how long each section should be before purchasing new components!

Sound Transfer

In many homes, the AC duct board is located right next to the main living area, making it a major source of noise. As such, it’s very important to consider insulation when choosing an AC duct board replacement.

Sound transfer can be a problem, especially if you have a noisy unit or you’re dealing with loud noises from outside your home. If so, sound insulation is important for a quiet home as well as for comfort and health reasons; keeping outside noise out also reduces air quality concerns and increases safety within your home.

Moisture and Corrosion Resistance

After you’ve determined that duct board is the right material for your home, it’s important to look at other factors. For example, metal can be subject to corrosion and moisture buildup. Metal conducts heat well and electricity easily, which makes it a good choice for the AC system in your home. But since metal is a conductor of electricity and heat, it will also conduct those things away from where they’re supposed to be going!

If you’re having trouble understanding what this means in practice, here are two examples:

  • If there’s moisture in your ducts (which happens when water condenses on cold surfaces), then that water will follow along with the flow of air through the ducts until it reaches an outlet or vent where it can escape into the outdoors.* This can result in mold growth on surfaces around vents or outlets.*
  • If wires get too close together within wiring bundles (which happen when wiring isn’t run properly), then they could short out against each other and start emitting heat or sparks—and those sparks may ignite flammable materials nearby!

Chemical Resistance

Chemical Resistance

If you’re looking for a replacement AC duct board, it’s important to consider its chemical resistance. The materials used in your home may be vulnerable to certain substances, meaning they could corrode or degrade over time. For example: if you have vinyl siding on your house, it’s likely that the exterior walls of your home will be exposed to synthetic cleaners and pesticides used in lawn care. These chemicals may cause damage if they come into contact with the material of your AC duct board (or any other part of your air conditioning system).

You can find out how well-suited a material is for use in an environment like yours by checking out its specifications sheet or conducting research online about what chemicals are commonly found in area homes. If possible, test out samples from different suppliers before making a purchase so that you know exactly which ones will work best under different conditions!

Thermal Conductivity/Insulation Value

Thermal conductivity is the ability of a material to transfer heat. It is measured in BTU/(hr ft² oF). The higher the thermal conductivity, the better the quality of a material. For example, if you have two pieces of copper that are the same size and shape but one has a higher thermal conductivity than another, then it will transfer more heat per unit time to its surroundings.

Thermal conductivity is measured using ASTM E96 test method which uses an infrared sensor mounted on top of an x-y table. A small sample (1 inch by 1 inch) of insulation material is placed between two flat plates with holes drilled into them at various points along their lengths so as to allow air circulation through them when heated up by an infrared source below each flat plate.

It’s not just about pricing when you shop for a replacement AC duct board.

The cost of a replacement AC duct board is just one factor that you should take into account when shopping for one. You need to consider the quality of the product, which is influenced by its materials, design and construction.

The quality of installation matters as well. If your new duct board has been poorly installed by an inexperienced technician, chances are high that it will not perform well or last long in service. A poor installation can also lead to air leakage and energy loss through unwanted gaps in insulation material.

Service quality is another important consideration when buying an AC duct board because service problems can arise after purchase if there’s something wrong with your current system or with the new replacement unit itself (for example: improper wiring). The same goes for warranties and guarantees—the longer they last (and cover), the better off you’ll be if something goes wrong with your unit within those periods!


As we’ve seen, there are some important considerations to take into account when choosing an AC duct board. Don’t let yourself be fooled by the seemingly low costs of a cheap product. Remember, you will often find what you pay for and you don’t want to be putting a shoddy product in your home or business. There is no doubt that an investment in quality will protect your home and provide you with years of energy savings, comfort, and safety.

Leave a Reply