{"product_id":"vortex-3-to-4-pellet-stove-black-increaser-vop5152","title":"3\" to 4\" Pellet Stove Black Increaser — VOP5152","description":"\u003cp\u003eVortex 3\"-to-4\" black increaser for pellet stoves — connects a stove's 3\" flue collar to Vortex 4\" pellet vent pipe. This is the same conversion Drolet uses in its factory ECO-55 basement venting package: start the run with this increaser at the stove, then continue in 4\".\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNot limited to Drolet.\u003c\/strong\u003e This increaser fits any pellet stove with a 3\" flue collar, provided the rest of the run is built in Vortex 4\" pellet vent. Measure your stove's exhaust outlet before ordering.\u003c\/p\u003e\u003cp\u003eA 4\" run allows longer total vent lengths than 3\" — useful for basement installs and extended horizontal or vertical runs.\u003c\/p\u003e\u003cp\u003eVortex pellet vent is listed at \u003cstrong\u003e1\" clearance to combustibles\u003c\/strong\u003e and meets NFPA 211, CSA B365, \u003cstrong\u003eUL 641\u003c\/strong\u003e, CAN\/ULC S609 and ULC\/ORD C441. Pairs with other Vortex 4\" pellet vent components. Not for ComfortBilt or Englander pellet stoves — those use 3\" DuraVent PelletVent Pro systems, which cannot be mixed with Vortex venting.\u003c\/p\u003e","brand":"Vortex","offers":[{"title":"Default Title","offer_id":50971469447420,"sku":"VOP5152","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/9944\/0892\/files\/VOP5152.jpg?v=1786543217","url":"https:\/\/stovesource.com\/products\/vortex-3-to-4-pellet-stove-black-increaser-vop5152","provider":"StoveSource","version":"1.0","type":"link"}