Indoor Vent Kit 8", Hayward Negative Pressure f/ H350

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. 2inx 2 1/2in 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