{"product_id":"20-axial-ac-high-output-metal-blower","title":"20\" Axial AC High Output Metal Blower","description":"\u003ch2\u003eAllegro 20\" Axial AC High Output Metal Blower — Maximum Airflow for Demanding Confined Space Ventilation\u003c\/h2\u003e\n\u003cp\u003eThe Allegro 9525-50 is a 20-inch, 2 HP axial AC blower engineered for applications requiring maximum air output in construction, industrial, manufacturing, and confined space environments. Built around a 16-gauge cold rolled steel housing with an epoxy powder-coated safety orange finish, this unit delivers up to 7,500 CFM of free-air flow from a dual-voltage 115V–230V AC motor. It is UL Listed and certified to CSA Standard C22.2 No. 113, making it a code-compliant solution for professional ventilation work.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eALLEGRO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eItem #\u003c\/td\u003e\n\u003ctd\u003e9525-50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e741851952550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e20\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e2 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e115V–230V AC, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlade Count\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFan Material\u003c\/td\u003e\n\u003ctd\u003eGlass reinforced polypropylene (PPG) four-blade fan with aluminum hub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003e16-gauge cold rolled steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Finish\u003c\/td\u003e\n\u003ctd\u003eEpoxy powder-coated safety orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrill\u003c\/td\u003e\n\u003ctd\u003eSteel\/chrome plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow — Free Air\u003c\/td\u003e\n\u003ctd\u003e7,500 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow — One 90° Bend\u003c\/td\u003e\n\u003ctd\u003e6,700 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow — Two 90° Bends\u003c\/td\u003e\n\u003ctd\u003e6,130 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e97 lbs (83 lbs per linecard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eConstruction, Industrial, Manufacturing, Confined Space\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL Listed; Certified to CSA Standard C22.2 No. 113\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eInterchangeable flange for intake or exhaust side mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeet\u003c\/td\u003e\n\u003ctd\u003e4 rubber feet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Items\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eItem #\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e9525-50\u003c\/td\u003e\n\u003ctd\u003e20\" Axial AC High Output Metal Blower\u003c\/td\u003e\n\u003ctd\u003e20\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eCompared to the standard 20\" axial model (9525) rated at 4,650 CFM free air with a ½ HP motor, the 9525-50 delivers 7,500 CFM free air with a 2 HP motor — a substantially higher output suited for larger confined spaces or longer duct runs where airflow volume is critical. The dual-voltage design (115V–230V) also provides flexibility across different site power configurations without requiring a separate model.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003ch4\u003eHigh Output 2 HP Motor\u003c\/h4\u003e\n\u003cp\u003eThe 2 HP motor drives up to 7,500 CFM of free-air flow, maintaining 6,700 CFM through one 90° bend and 6,130 CFM through two 90° bends. This sustained output across duct configurations means contractors can ventilate larger or more complex confined spaces without sacrificing airflow performance.\u003c\/p\u003e\n\u003ch4\u003eDual-Voltage Operation (115V–230V AC)\u003c\/h4\u003e\n\u003cp\u003eThe 115V–230V AC, 60 Hz motor accommodates a wide range of site power supplies, reducing the need for additional electrical infrastructure or step-down transformers. This flexibility makes the blower practical across diverse job sites and international deployments.\u003c\/p\u003e\n\u003ch4\u003e16-Gauge Cold Rolled Steel Housing\u003c\/h4\u003e\n\u003cp\u003eThe heavy-gauge steel housing resists impact and deformation in demanding job site conditions. The epoxy powder-coated safety orange finish provides corrosion resistance and high visibility on busy work sites.\u003c\/p\u003e\n\u003ch4\u003eInterchangeable Flange for Intake or Exhaust Mounting\u003c\/h4\u003e\n\u003cp\u003eThe interchangeable flange allows the blower to be configured for either intake (fresh air supply) or exhaust (contaminated air removal) without purchasing a separate unit. This dual-function capability reduces equipment costs and simplifies inventory for contractors managing multiple confined space operations.\u003c\/p\u003e\n\u003ch4\u003eIntegrated Carrying Handles\u003c\/h4\u003e\n\u003cp\u003eBuilt-in carry handles allow a single worker to reposition the blower between job sites or within a work area without additional lifting equipment. Combined with four rubber feet for stable placement, the unit is designed for practical field use.\u003c\/p\u003e\n\u003ch4\u003eGlass Reinforced Polypropylene (PPG) Four-Blade Fan with Aluminum Hub\u003c\/h4\u003e\n\u003cp\u003eThe PPG fan blades offer resistance to chemical exposure and impact while the aluminum hub provides structural rigidity at high rotational speeds. This combination supports reliable, long-service operation in industrial and construction environments.\u003c\/p\u003e\n\u003ch4\u003eUL Listed and CSA Certified\u003c\/h4\u003e\n\u003cp\u003eThe 9525-50 is UL Listed and certified to CSA Standard C22.2 No. 113 (Fans and Ventilators), confirming it meets recognized North American safety standards. This certification supports compliance with OSHA confined space ventilation requirements.\u003c\/p\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003ch4\u003eConfined Space Ventilation\u003c\/h4\u003e\n\u003cp\u003eDesigned specifically for confined space work, this blower supplies or exhausts air in manholes, vaults, tunnels, tanks, vessels, silos, and similar enclosed environments where OSHA-compliant ventilation is required prior to and during worker entry.\u003c\/p\u003e\n\u003ch4\u003eConstruction Site Ventilation\u003c\/h4\u003e\n\u003cp\u003eUsed on construction sites to ventilate enclosed structures, below-grade work areas, and partially completed buildings where fresh air circulation is needed for worker safety and comfort.\u003c\/p\u003e\n\u003ch4\u003eIndustrial and Manufacturing Facilities\u003c\/h4\u003e\n\u003cp\u003eSuitable for ventilating hoppers, storage bins, pipelines, ductwork, and other industrial confined spaces in manufacturing and processing plants where high airflow volume is required.\u003c\/p\u003e\n\u003ch4\u003eTunnel and Underground Work\u003c\/h4\u003e\n\u003cp\u003eThe high CFM output and ability to maintain airflow through multiple duct bends makes this blower effective for tunnel ventilation and other underground applications requiring air movement over longer distances.\u003c\/p\u003e\n\u003ch4\u003eShipyard and Refinery Applications\u003c\/h4\u003e\n\u003cp\u003eThe steel construction and high output capacity suit demanding environments such as shipyards and refineries where robust, high-volume ventilation equipment is required for tank and vessel entry operations.\u003c\/p\u003e\n\u003ch3\u003eCompatible Materials\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStandard flexible ducting (sold separately)\u003c\/li\u003e\n\u003cli\u003eCompatible with axial inline booster blowers as a velocity accelerator for longer duct distances\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Documents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/yyceyzilclkoimlwk4zr_3d54940a-98ae-4b0d-89a1-ee2dc6c5c754.pdf?v=1791924973\" rel=\"noopener\" target=\"_blank\"\u003eAllegro Ventilation Blowers Linecard\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the free-air CFM rating of the 9525-50?\u003c\/strong\u003e\u003cbr\u003eA: The 20\" Axial AC High Output Metal Blower delivers 7,500 CFM in free air, 6,700 CFM through one 90° bend, and 6,130 CFM through two 90° bends.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this blower be used for both intake and exhaust ventilation?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The interchangeable flange allows the unit to be configured for either intake (supplying fresh air) or exhaust (removing contaminated air) side mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What voltages does the 9525-50 support?\u003c\/strong\u003e\u003cbr\u003eA: The blower operates on 115V–230V AC, 60 Hz, providing flexibility for different site power supplies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this blower certified for use in confined spaces?\u003c\/strong\u003e\u003cbr\u003eA: The 9525-50 is UL Listed and certified to CSA Standard C22.2 No. 113 (Fans and Ventilators), supporting use in confined space ventilation applications in compliance with applicable safety standards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this blower suitable for hazardous (explosive) environments?\u003c\/strong\u003e\u003cbr\u003eA: No. The 9525-50 is a standard AC metal axial blower and is not explosion-proof. For hazardous environments, Allegro offers separate explosion-proof models (e.g., 9525-50EX). A qualified safety specialist should evaluate any confined space prior to entry.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How far back should the blower be set from a confined space opening?\u003c\/strong\u003e\u003cbr\u003eA: Allegro recommends setting the blower back a minimum of five (5) feet from the opening when ventilating a manhole or tank. This helps prevent hazardous gases purged from the confined space from being drawn back into the blower intake and recirculated into the space.\u003c\/p\u003e","brand":"Allegro","offers":[{"title":"Default Title","offer_id":67687585087662,"sku":"9525-50","price":2935.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0551\/8396\/6382\/files\/cfd42c6d8ac03e8012836bd01575d58f7c7e3a97.jpg?v=1791924976","url":"https:\/\/www.diamondtoolstore.com\/products\/20-axial-ac-high-output-metal-blower","provider":"Diamond Tool Store","version":"1.0","type":"link"}