With portable units, there is no external unit to perform this function. So to get rid of the hot air they produce, the portable device uses a flexible hose that is either fixed to a window vent or fixture, a wall vent or as is often the case, dangled out the nearest available open...
Portable Propane RV Fire Pits Black Magic Sand (Blue Flames Sands) Crushed Lava (And Other Fillers) Spun Aluminum Bowls Stainless Steel Bowls FireBalls, Porcelain and Concrete Natural Gas Burners Propane Gas Burners Unique and Custom Burners Ribbon Burners Fireplace Pans, Burners and Baskets Cust...