Which method is commonly used to remove certain odors from indoor air?

Which method is commonly used to remove certain odors from indoor air?

• A. Increased airflow alone.
• B. Standard disposable filters.
• C. Heating the air to destroy odors.
• D. Activated charcoal filters.

Answer: (D)

Removing odors from indoor air is best achieved by adsorption of odor molecules onto a material with a very large surface area. Activated charcoal has a highly porous structure that traps volatile organic compounds and other odor-causing molecules as air passes through, making it effective at neutralizing a wide range of smells from cooking, smoke, cleaners, and solvents. Increasing airflow only dilutes odors and can spread them elsewhere without actually removing the molecules. Standard disposable filters are designed to capture particles, not gases or odors, so they don’t reliably remove odor-causing compounds. Heating the air to destroy odors isn’t practical or reliable, as many odors are gases that require specific reactions or higher energy input to break down, and this can create byproducts or be inefficient. So activated charcoal filters are the commonly used method to remove odors from indoor air.

Removing odors from indoor air is best achieved by adsorption of odor molecules onto a material with a very large surface area. Activated charcoal has a highly porous structure that traps volatile organic compounds and other odor-causing molecules as air passes through, making it effective at neutralizing a wide range of smells from cooking, smoke, cleaners, and solvents.

Increasing airflow only dilutes odors and can spread them elsewhere without actually removing the molecules. Standard disposable filters are designed to capture particles, not gases or odors, so they don’t reliably remove odor-causing compounds. Heating the air to destroy odors isn’t practical or reliable, as many odors are gases that require specific reactions or higher energy input to break down, and this can create byproducts or be inefficient.

So activated charcoal filters are the commonly used method to remove odors from indoor air.