Replacement 21178 Low-Profile Dual-Fan Convection Blower

Overview:

The 21178 Convection Blower Motor is a low-profile, dual-fan replacement blower designed to circulate heated air in compatible wood stoves and heating systems. Its compact configuration provides balanced convection airflow while fitting applications where installation height is limited.

This blower measures 25 inches in total length when the mounting brackets are included and 3.25 inches in height. The outlet opening measures 9.5 inches wide by approximately 2 inches tall.

The 21178 is commonly used with Fasco stove applications. Because blower identification and wiring configuration are important when selecting a replacement, compare the existing blower, dimensions, mounting arrangement, and part numbers before ordering.

Key Features:

• Dual-fan configuration for balanced convection airflow
• Low-profile 3.25-inch height for space-restricted installations
• 25-inch overall length including mounting brackets
• Cross-referenced with multiple Fasco identifiers
• Designed as an aftermarket replacement convection blower

Important Information:

Correct electrical connections are critical. Tabs 2 and 3 must not be connected to power simultaneously.

When the blower is operated with a rheostat or variable-speed control, the supplied information specifies using tabs 1 and 2. Using tabs 1 and 3 with a rheostat can cause the motor to overheat and fail.

This is an aftermarket replacement part. Manufacturer and model names are used for compatibility and identification purposes only. This product is not represented as being manufactured by or affiliated with the original equipment manufacturers referenced.

FAQs:

Q: What is the 21178 convection blower used for?
A: It is a dual-fan convection blower designed to circulate heated air in compatible wood stoves and heating systems.

Q: What are the overall dimensions of the blower?
A: The supplied specifications list an overall length of 25 inches including the mounting brackets and a height of 3.25 inches.

Q: Can this blower be used with a rheostat?
A: The supplied wiring information states that when using a rheostat or variable-speed control, tabs 1 and 2 should be connected to power. Tabs 1 and 3 should not be used with a rheostat because this can cause overheating and motor failure.

Q: Is this an OEM blower?
A: It is an aftermarket replacement part. Original manufacturer names and part numbers are provided for identification and compatibility reference.

Fit / Measuring / Safety Notes:

• Do not select a replacement blower based on appearance alone.
• Compare the existing blower's part number, overall dimensions, outlet dimensions, mounting arrangement, and electrical connections before ordering.
• Overall length is listed as 25 inches including the mounting brackets.
• Blower height is listed as 3.25 inches.
• Outlet opening is listed as 9.5 inches wide by approximately 2 inches tall.
• Disconnect power to the heating appliance before installation or electrical work.
• Tabs 2 and 3 must never be connected to power simultaneously.
• When using a rheostat or variable-speed control, the supplied instructions specify tabs 1 and 2.
• Connecting tabs 1 and 3 when using a rheostat can cause overheating and motor failure.
• If you are unsure about electrical connections or installation, use a qualified service professional.
• Verify compatibility with the specific stove or heating appliance before purchasing.

Helpful Links:

• Browse our Replacement Convection Blower Motors for Additional Heating Appliance Repair Options
• View all Pellet Stove and HVAC Replacement Parts to Find Components for Maintenance and Repair
• Shop Fasco Compatible Replacement Motors and Parts
• Contact Us for Help Identifying the Correct Replacement Blower or Part for Your Stove or Heating Appliance