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Amazon.com: Duluth Forge Dual Fuel Ventless Gas Fireplace Insert, Remote Control, 6 Fire Logs, Use with Natural Gas or Liquid Propane, 32000 BTU, Heats up to 1500 Sq. Ft., Black : Home & Kitchen
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Pleasant Hearth 42-in Heritage Ventless Liquid Propane Gas Fireplace in the Gas Fireplaces department at Lowes.com
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Why Do Ventless Gas Logs Emit Odors? The Chemistry Behind It — Embers Custom Fireplace & Gas Products
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