Vertical 350 Negative Indoor Adapter Kit

The Hayward Universal H-Series Low Nox is designed specifically for either a positive-pressure or negative-pressure venting system. Both have their own factors that determine which one is the best fit.

Negative is strictly for a vertical, straight up or partially straight up venting system where there is minimal condensation due to the heat lifting and rising up with the formation of the vent pipe.

The Universal H-Series is energy efficient, high performance and installation adaptable.

• Standard Cupro Nickel Heat Exchanger
• Excellent Salt Water and chemical Corrosion Resistance
• Exclusive 'Totally Managed' Cupro Nickel Heat Exchanger Water Flow
• Same Water Velocity Through All Tubes for Faster Heating
• Patented Header By-Pass Design
• Up to 18% Savings by Reducing Pump Run-Time
• 2 in x 2 1/2 in CPVC Union Plumbing Connections
• Common Union for Installation or Service, Adapts to Larger Plumbing Recommended for Greater Efficiencies
• Low NOx Emissions - Meets Clean Air Quality Standards
• Vent pipe material: single or double wall galvanized non-sealed vent pipe.
• Vertical termination above roof of house or building.

Fits the Hayward Universal H-Series Low Nox models H350FDN and H350FDP.