Harman 5" Double Paddle Exhaust Fan Blade, 3-20-502221-AMP

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A $10.00 Savings vs the OEM

SKU 3-20-502221-AMP
MPN 3-20-502221


The Harman Combustion/Exhaust blowers require an impeller to aid in keeping air blowing thru the pellets to keep them blazing and to exhaust the smoke out of the stove thru the venting. The impeller can become damaged thru annual cleaning or if they become seized onto the post of the blower and cannot be removed when replacing that part. If the impeller has become warped or otherwise damaged it should be replaced.

Harman 5" Double Paddle Fan Blade, 3-20-502221

  • 5"-12 Petal x 2 (24)
  • Stove Replacement Part 3-20-502221
  • This stove part fits many Harman stove models. See the "Compatible Stoves" tab for details

Replacement For Part Number :
  • 3-20-502221

UPC #: 28589654001

Compatible Models


  • Accentra 52i
  • Accentra 52i TC
  • Advance
  • DVC 500
  • HF60
  • Invincible Insert
  • Invincible RS
  • P38
  • P38+
  • P43
  • P43-C
  • P61
  • P61-C
  • P61A
  • P68
  • P68-C
  • PB105
  • PF100
  • XXV

Technical Specs

5"-12 Petal x 2 (24)



Assembly Instructions For Harman 5" Double Paddle Exhaust Fan Blade, 3-20-502221-AMP

To remove the impeller blade you must gain access to it so you can physically see the paddles. Spin the paddles around until you can locate the Allen key set screw. It will be a 7/32” hole with a 5/32” threaded Allen key. It is helpful to spray the set screw with plenty of penetrating oil prior to applying any force to the set screw. If the set screw strips and many often do if they have not been turned out in years, the set screw may need to be drilled out, if you can access it with a drill. If the combustion blower is going to be changed during the process, the shaft of the combustion blower can be cut and replaced with a new motor and impeller. Personally, I assume that the screw cannot be taken out and always replace the motor and impeller together each time.


Unfortunately, sometimes products do not work like they are supposed to. We offer a 90 day warranty on manufacturer defects. Some manufacturers make this a very simple and easy process unfortunately others do not. Items must be used in accordance with the manufacturers guidelines to qualify for warranty replacement. Please be advised that warranty claims for these parts may take up to 4 weeks for processing, and customers must cover shipping.

Shipping Info

This Item Qualifies For Free Shipping With Orders Over $99!

When Will My Order Ship

All orders are typically processed within 24 hours of receiving payment and are shipped from us same day if placed before our shipping cutoff time (Monday - Friday: 1PM, Saturday: 10AM, Sunday: No Shipping), orders placed after our cutoff time are shipped the next morning.

How Does Free Shipping Work?

Most orders over $99 qualify for free shipping! Orders which ship for free are shipped with either USPS or UPS based on our discretion. If you are using a PO box, free shipping orders will always go USPS.

Is Expedited Shipping Available?

We offer both overnight and two day air shipping services for all orders placed within the Continental United States. For information on shipping cut-off times, go to our shipping page.

Do You Ship To Canada?

We ship to Canada! We estimate USPS to take 4-10 days once receiving your package from us. We do not offer expedited shipping of any kind to Canada. Please allow an extra 2-5 days for all shipments to Canada. Free shipping is not available to Canada.

Do You Ship To Alaska Or Hawii?

We ship to both Alaska and Hawaii! We do not offer next day or two day shipping to Alaska or Hawaii. Free shipping is not available to Alaska or Hawaii.

Do You Ship Outside The US Or Canada?

Unfortunately, at this time we do not offer international shipping other than to Canada.

If you wish to calculate shipping for an item which does not qualify for free shipping, or if you would like the cost to expedite your order, please do the following. Add the item you want to order to your cart and click here to be taken to the cart page where you can enter your country, state / province, and zip code for an estimate.

Shipping Time Estimations

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Read More About Our Shipping Information

Customer Reviews

Based on 23 reviews
Great parts, good prices too.

Good quality parts for a good price. Pellet stove is back up and running.

Great service

Great service, quick shipment of correct parts at good prices

The right parts and the right price

After ordering so many things from Amazon and often getting the wrong thing, it is so nice to order something that actually fits and works. The site said the motor would work on a Harman P38 and it does!


Great service

Harlan pieces

Good service good product


Ask a Question
  • will this work with 3-21-33647 motor


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