What typically passes through a filter before entering the air handler for conditioning?

What typically passes through a filter before entering the air handler for conditioning?

• A. Water
• B. Air
• C. Refrigerant
• D. Dust

Answer: (B)

Air is what passes through a filter before entering the air handler. The filter sits in the air intake path and its job is to clean the air by trapping dust and particulates as the blower pulls air into the system. That means the air itself moves through the filter, with dust and other contaminants being removed. Water wouldn’t normally flow through a filter in this context, and refrigerant stays in a sealed loop inside the equipment, not in the incoming air. Dust is what the filter captures, not what passes through.

Air is what passes through a filter before entering the air handler. The filter sits in the air intake path and its job is to clean the air by trapping dust and particulates as the blower pulls air into the system. That means the air itself moves through the filter, with dust and other contaminants being removed. Water wouldn’t normally flow through a filter in this context, and refrigerant stays in a sealed loop inside the equipment, not in the incoming air. Dust is what the filter captures, not what passes through.