{"product_id":"s-p-crhb-4-225-n-225mm-roof-mounted-fan","title":"S\u0026P CRHB\/4-225 N 225mm Roof-Mounted Fan","description":"\u003cp data-start=\"392\" data-end=\"1043\"\u003eThe \u003cstrong data-start=\"396\" data-end=\"440\"\u003eS\u0026amp;P CRHB\/4-225 N 225 mm Roof-Mounted Fan\u003c\/strong\u003e is a compact centrifugal roof ventilation unit designed for reliable airflow in commercial and industrial buildings. It features a \u003cstrong data-start=\"572\" data-end=\"603\"\u003ehorizontal discharge design\u003c\/strong\u003e with a very low-profile structure, making it ideal for roof installations where height is limited. The fan uses a high-efficiency backward-curved impeller and an external rotor motor for strong airflow and energy-efficient operation. Built with a galvanised steel base and aluminium weather cowl, the unit provides durable protection against outdoor conditions and long-term ventilation performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1045\" data-end=\"1048\"\u003e\n\u003ch2 data-section-id=\"19nploz\" data-start=\"1050\" data-end=\"1077\"\u003eMaterial \u0026amp; Build Quality\u003c\/h2\u003e\n\u003cul data-start=\"1078\" data-end=\"1627\"\u003e\n\u003cli data-section-id=\"1smwk4f\" data-start=\"1078\" data-end=\"1181\"\u003e\n\u003cp data-start=\"1080\" data-end=\"1181\"\u003e\u003cstrong data-start=\"1080\" data-end=\"1089\"\u003eBase:\u003c\/strong\u003e Galvanised sheet steel construction for durability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1r8b7fe\" data-start=\"1182\" data-end=\"1273\"\u003e\n\u003cp data-start=\"1184\" data-end=\"1273\"\u003e\u003cstrong data-start=\"1184\" data-end=\"1193\"\u003eCowl:\u003c\/strong\u003e Spun aluminium weather protection hood. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8kx2be\" data-start=\"1274\" data-end=\"1411\"\u003e\n\u003cp data-start=\"1276\" data-end=\"1411\"\u003e\u003cstrong data-start=\"1276\" data-end=\"1289\"\u003eImpeller:\u003c\/strong\u003e High-efficiency backward-curved centrifugal impeller (plastic on smaller models). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"au6aru\" data-start=\"1412\" data-end=\"1519\"\u003e\n\u003cp data-start=\"1414\" data-end=\"1519\"\u003e\u003cstrong data-start=\"1414\" data-end=\"1424\"\u003eMotor:\u003c\/strong\u003e External rotor motor with thermal overload protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1sbtr9p\" data-start=\"1520\" data-end=\"1627\"\u003e\n\u003cp data-start=\"1522\" data-end=\"1627\"\u003e\u003cstrong data-start=\"1522\" data-end=\"1532\"\u003eGuard:\u003c\/strong\u003e Steel bird-proof safety guard to protect the impeller. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1629\" data-end=\"1632\"\u003e\n\u003ch2 data-section-id=\"1a3ueyz\" data-start=\"1634\" data-end=\"1651\"\u003eSpecifications\u003c\/h2\u003e\n\u003cul data-start=\"1653\" data-end=\"2569\"\u003e\n\u003cli data-section-id=\"k5yo9u\" data-start=\"1653\" data-end=\"1717\"\u003e\n\u003cp data-start=\"1655\" data-end=\"1717\"\u003e\u003cstrong data-start=\"1655\" data-end=\"1672\"\u003eProduct Type:\u003c\/strong\u003e Centrifugal Roof-Mounted Fan (CRHB Series)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1mvpajv\" data-start=\"1718\" data-end=\"1745\"\u003e\n\u003cp data-start=\"1720\" data-end=\"1745\"\u003e\u003cstrong data-start=\"1720\" data-end=\"1730\"\u003eModel:\u003c\/strong\u003e CRHB\/4-225 N\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ugxxmx\" data-start=\"1746\" data-end=\"1778\"\u003e\n\u003cp data-start=\"1748\" data-end=\"1778\"\u003e\u003cstrong data-start=\"1748\" data-end=\"1765\"\u003eFan Diameter:\u003c\/strong\u003e \u003cstrong data-start=\"1766\" data-end=\"1776\"\u003e225 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1f8uu8w\" data-start=\"1779\" data-end=\"1828\"\u003e\n\u003cp data-start=\"1781\" data-end=\"1828\"\u003e\u003cstrong data-start=\"1781\" data-end=\"1800\"\u003eDischarge Type:\u003c\/strong\u003e Horizontal roof discharge\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"lmoy75\" data-start=\"1829\" data-end=\"1872\"\u003e\n\u003cp data-start=\"1831\" data-end=\"1872\"\u003e\u003cstrong data-start=\"1831\" data-end=\"1846\"\u003eMotor Type:\u003c\/strong\u003e External rotor AC motor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ifwmwj\" data-start=\"1873\" data-end=\"1963\"\u003e\n\u003cp data-start=\"1875\" data-end=\"1963\"\u003e\u003cstrong data-start=\"1875\" data-end=\"1887\"\u003eVoltage:\u003c\/strong\u003e \u003cstrong data-start=\"1888\" data-end=\"1923\"\u003e230 V \/ 50–60 Hz (Single Phase)\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"pt7jif\" data-start=\"1964\" data-end=\"2057\"\u003e\n\u003cp data-start=\"1966\" data-end=\"2057\"\u003e\u003cstrong data-start=\"1966\" data-end=\"1988\"\u003eProtection Rating:\u003c\/strong\u003e \u003cstrong data-start=\"1989\" data-end=\"1997\"\u003eIP54\u003c\/strong\u003e, insulation class F \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"trv1o3\" data-start=\"2058\" data-end=\"2137\"\u003e\n\u003cp data-start=\"2060\" data-end=\"2137\"\u003e\u003cstrong data-start=\"2060\" data-end=\"2076\"\u003eMax Airflow:\u003c\/strong\u003e Approx. \u003cstrong data-start=\"2085\" data-end=\"2097\"\u003e740 m³\/h\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"189hwo\" data-start=\"2138\" data-end=\"2211\"\u003e\n\u003cp data-start=\"2140\" data-end=\"2211\"\u003e\u003cstrong data-start=\"2140\" data-end=\"2150\"\u003eSpeed:\u003c\/strong\u003e Approx. \u003cstrong data-start=\"2159\" data-end=\"2171\"\u003e1400 rpm\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jkk005\" data-start=\"2212\" data-end=\"2313\"\u003e\n\u003cp data-start=\"2214\" data-end=\"2313\"\u003e\u003cstrong data-start=\"2214\" data-end=\"2234\"\u003eMax Temperature:\u003c\/strong\u003e Up to \u003cstrong data-start=\"2241\" data-end=\"2250\"\u003e70 °C\u003c\/strong\u003e continuous operation \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9elsrx\" data-start=\"2314\" data-end=\"2395\"\u003e\n\u003cp data-start=\"2316\" data-end=\"2395\"\u003e\u003cstrong data-start=\"2316\" data-end=\"2332\"\u003eNoise Level:\u003c\/strong\u003e Approx. \u003cstrong data-start=\"2341\" data-end=\"2353\"\u003e42 dB(A)\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1t3bmy5\" data-start=\"2396\" data-end=\"2455\"\u003e\n\u003cp data-start=\"2398\" data-end=\"2455\"\u003e\u003cstrong data-start=\"2398\" data-end=\"2415\"\u003eInstallation:\u003c\/strong\u003e Roof mounted on flat or mounting base\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"10aa77m\" data-start=\"2456\" data-end=\"2569\"\u003e\n\u003cp data-start=\"2458\" data-end=\"2569\"\u003e\u003cstrong data-start=\"2458\" data-end=\"2475\"\u003eApplications:\u003c\/strong\u003e Commercial buildings, warehouses, factories, workshops, and general HVAC extraction systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Direct Duct Supplies","offers":[{"title":"Default Title","offer_id":57353594569029,"sku":null,"price":537.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5168\/0325\/files\/S_PCRHB4-225N225mmRoof-MountedFan.png?v=1773215074","url":"https:\/\/directductsupplies.com\/products\/s-p-crhb-4-225-n-225mm-roof-mounted-fan","provider":"Direct Duct Supplies","version":"1.0","type":"link"}