Napoleon Periscope (Snorkel) for Wall Penetration Below Grade | GD401 Wood Grain GRFC Concrete Transform your outdoor area into

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Napoleon Periscope (Snorkel) for Wall Penetration Below Grade | GD401 Wood Grain GRFC Concrete Transform your outdoor area intoBelow Grade Venting Solution for Napoleon Direct Vent Fireplaces The Napoleon GD401 Periscope (Snorkel) for Wall Penetration Below Grade is designed to allow safe and code compliant vent termination when a direct vent fireplace must be installed below exterior grade level. This vertical periscope style vent raises the exhaust and intake termination point above grade, helping prevent water infiltration, debris blockage, and improper venting conditions.