Single-Sided Combustion Blower Fan Blade – 4-3/4" | Harman Part #3-21-00661 (20181)

Single-Sided Combustion Blower Fan Blade – 4-3/4" | Harman Part #3-21-00661 | Fits Accentra Insert, P35i, PF120
Restore balance and performance to your pellet stove with the Harman 3-21-00661 single-sided impeller. This 4-3/4" diameter combustion blower fan blade is specifically engineered for select Harman and Heatilator models and is essential for ensuring optimal airflow and stove efficiency.

Key Features:
✅ OEM Replacement – Harman Part #3-21-00661 for guaranteed fit and performance
✅ Precision-Balanced – 12-petal single-sided impeller helps reduce vibration and improve airflow
✅ High-Quality Construction – Designed to withstand the rigors of high-temp pellet stove operation
✅ Maintenance Tip – Ideal to replace when servicing or upgrading your combustion blower motor

Product Specifications:
📌 Outer Diameter (OD): 4-3/4"
📌 Shaft ID: 5/16"
📌 Petals: 12 (Single-Sided)
📌 Tool Required: 5/32" Allen Key
📌 Part Number: 3-21-00661 (20181)

Fits the Following Models:

Harman:

• Accentra Insert

• P35i

• P35i-C

• PF120 Pellet Furnace

Heatilator Eco-Choice:

• BIO-120 Pellet Boiler

When to Replace Your Fan Blade:

• If the impeller petals (fins) are bent, cracked, or corroded

• If the fan is unbalanced and causing vibration

• During combustion blower motor replacement

Important Note:
Harman manufactures three different impeller sizes. Please confirm your model before ordering:

• 4-3/4" Single-Sided: Part #3-21-00661 (this listing)

• 5" Single-Sided: Part #3-20-40985

• 5" Double-Sided: Part #3-20-502221

Installation Tip:
Impellers can seize to the motor shaft. If removal is difficult, cutting the shaft may be required. Be sure to have a replacement impeller ready if you’re servicing or replacing the motor.

Restore smooth and efficient combustion airflow with the Harman 3-21-00661 single-sided fan blade. Order today and keep your pellet stove running like new!