{"product_id":"spring-loaded-non-return-damper-200mm-nrd200","title":"Spring loaded non return damper 200mm (NRD200)","description":"\u003cp\u003eA spring loaded non return damper for 200mm duct, letting air pass one way and closing to stop backdraught in larger exhaust and ventilation runs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 200mm\u003c\/li\u003e\n\u003cli\u003eSpring loaded\u003c\/li\u003e\n\u003cli\u003eFits: inline in the duct run\u003c\/li\u003e\n\u003cli\u003eCode: NRD200\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe 200mm size suits bigger inline fans and commercial exhaust runs. The damper is fitted inline, often just after the fan, so that when the fan stops the spring closes it and outside air is kept from flowing back. Support the duct either side so the damper is not carrying its weight, and seal both joints.\u003c\/p\u003e\u003cp\u003eCheck the duct is 200mm and that the damper will sit in a straight section where it can open fully. Fit it so the marked flow direction matches the airflow from the fan.\u003c\/p\u003e","brand":"AAD","offers":[{"title":"Default Title","offer_id":48851339608301,"sku":"NRD200","price":28.6,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/5114\/2125\/files\/NRD150-big_1_99e1e92b-11a0-4503-a7d5-15d76ecea864.png?v=1760432267","url":"https:\/\/www.achub.com.au\/products\/spring-loaded-non-return-damper-200mm-nrd200","provider":"AC Hub Direct","version":"1.0","type":"link"}