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Allegro 20" Axial AC Standard Metal Blower

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Allegro 20" Axial AC Standard Metal Blower
The Allegro 20" Axial AC Standard Metal Blower was designed for applications requiring a maximum amount of output. 
Housing is made from 16 gauge cold rolled steel and powder coated in a “safety orange” color that holds a three-blade impeller. It features an interchangeable flange for intake or exhaust mounting, integrated carry handles for easy transport, a steel/zinc plated grill and 4 rubber feet. UL Listed. Certified to CSA Standard C22.2 No.113.
Free Air One 90° Bend Two 90° Bends
4650 CFM 3150 CFM 2950 CFM
56 lbs. 1/2 HP 115V AC, 60 Hz


  • Complete unit epoxy powder coated in orange

  • Interchangeable flange for intake or exhaust side



  • 16 gauge cold rolled steel housing


  •  3/16” (0.476 cm) steel bolted motor base

  •  Integrated carrying handles

  • Steel/chrome plated grill

  • Equipped with four rubber feet



1/2 HP


UL Recognized, CSA Certified


115V AC, 60 Hz, Single Phase



Current Draw



25’ (7.62 m) 16/3 AWG, SJTW 90C 300V medium duty


NEMA 5-15 (Grounded three-prong)


  • Glass reinforced Polypropylene (PPG) three blade fan, with aluminum hub

  • Moving fan mounted 1 5/8” (4.12 cm) from grill for safety, grill gap-5/16” (0.79 cm)

Ducting: (Optional)

  • Retractable, non-collapsible design

  • Single-ply, PVC coated, vinyl and polyester materials, temperature resistant up to 180°F (82.2°C)

  • Yellow color with black weather-strip and integrated nylon straps

  • Class 1 hard drawn spring steel wire helix that meets ASTM 227 specs

Blower Dimensions:

Length In. (cm)

Width In. (cm)

Height In. (cm)

Weight Lbs. (Kg)

19” (48.2 cm)

22” (55.8 cm)

22 1/2” (57.1 cm)

56 lbs. (25.4 kg)

Flow Rates:(CFM calculated using 15’ (4.75 m) of 20” (50.8 cm) ducting)

Free Air CFM (m3/hr)

One 90° Bend CFM (m3/hr) Two 90° Bends CFM (m3/hr)

4650 (7900.39)

3150 (5351.88)

2950 (5012.08)

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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