Can the Fasco B24220 move enough air for a tight crawlspace?

You must measure your crawlspace’s total cubic footage to ensure this volume meets your needs, then confirm your local power supply provides the 115 Volts required to run the motor.

Fasco B24220 airflow capacity and limitations for residential ventilation

This blower operates at 2600 RPM to push air through a system. Because airflow capacity (the volume of air moved through the system per unit of time) drops as resistance increases, you should account for the static pressure (the resistance the fan must overcome) created by your specific ductwork or debris. We selected this unit for our comparison because it offers a mid-range power profile for residential ventilation. While it handles a small crawlspace, it lacks the 300 to 600 CFM needed for whole-home ventilation or the 400 to 800 CFM required for laboratory fume hoods.

For a comprehensive overview, see our full review of the Fasco B24220.

What to Check Before Buying the Fasco B24220

Verify these technical requirements to ensure the blower performs correctly in your specific environment:

You can find the technical specs for the Fasco B24220 detailed in our breakdown.

• Confirm your ducting or ventilation ports match the blower’s inlet and outlet diameter to avoid turbulence.
• Verify that your power source provides 115 Volts and can handle a 1.3 Amp draw.
• Check that the installation site remains dry, as the sleeve bearing and motor require protection from excessive moisture.
• Ensure the mounting area allows for vibration isolation to prevent the 2600 RPM motor from shaking adjacent structures.
• Measure the physical space to ensure the 8.8 x 8.6 x 8 inch dimensions clear your intended mounting point.

Comparing the Fasco B24220 to Other Options

The Fasco B24220 is suited for users who need a compact, UL-recognized unit for localized air movement. If you require high-pressure industrial ducting or need to exhaust radon from a large basement, you may need a unit with a higher CFM rating than 135. Buyers seeking whole-home ventilation or high-volume industrial cooling should look for larger centrifugal blowers or VFD-integrated systems that provide higher sustained airflow and more precise flow control.

If you have specific questions, view our Fasco B24220 review FAQ for more details.

If you need a reliable solution for a small crawlspace or a single-room ventilation project, the Fasco B24220 is a suitable choice. However, if your project requires moving large volumes of air across a whole house or a laboratory, you should look for a higher-capacity blower.

Reviewed by the Refrigerant Recovery Pro editorial team. Refrigerant Recovery Pro writes these guides from the 200 most-reviewed centrifugal blower listings in our retail dataset, not from manufacturer copy.