{"product_id":"ac-infinity-backdraft-damper","title":"AC Infinity Backdraft Damper","description":"\u003cp\u003eThe AC Infinity Backdraft Damper is a one-way airflow ducting insert designed to prevent cold drafts, debris, insects, and pests from entering ductwork when the connected fan is off. Built from black powder-coated galvanised steel with spring-loaded aluminium butterfly blades, it seats firmly inside standard round ducting using dual outer rubber gasket rings that create an airtight grip in either a horizontal or vertical orientation, without the need for tools, screws, or adhesive.\u003c\/p\u003e\n\u003cp\u003eWhen the fan operates, the butterfly blades open with minimal airflow resistance, allowing exhaust air to pass through freely. When the fan stops, the spring-loaded blades close automatically, sealing the duct and blocking any return airflow, drafts, or debris. This makes the damper particularly valuable in grow tent setups where an inline fan exhausts through a wall or ceiling penetration. Without a damper in place, cold air, moisture, and insects can enter the tent through the exhaust duct whenever the fan is idle or between duty cycles.\u003c\/p\u003e\n\u003cp\u003eThe galvanised steel body and black powder coat finish provide long-term resistance to corrosion in high-humidity environments. Each damper can be fully or partially inserted into the ductwork, with the rubber rings holding it securely in place. Beyond grow rooms, the damper suits range hoods, bathroom exhaust fans, laundry dryers, and any HVAC application where one-way airflow control is required. For a grower running their exhaust fan on a timed schedule, fitting a backdraft damper at the wall exit keeps the tent sealed and pest-free during every off cycle.\u003c\/p\u003e","brand":"AC Infinity","offers":[{"title":"100 mm","offer_id":45953075937438,"sku":"819137021303","price":47.49,"currency_code":"AUD","in_stock":false},{"title":"150 mm","offer_id":45953075970206,"sku":"819137021310","price":56.99,"currency_code":"AUD","in_stock":false},{"title":"200 mm","offer_id":45953076002974,"sku":"819137021327","price":61.74,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0709\/5261\/6094\/files\/AC_Infinity_Backdraft_Damper_100mm.png?v=1778909183","url":"https:\/\/www.hydrooasis.com.au\/products\/ac-infinity-backdraft-damper","provider":"Hydro Oasis","version":"1.0","type":"link"}