400K Negative Pressure Indoor Vent Adapter

This adapter kit lets a Hayward Universal H-Series H400FD Low NOx heater vent indoors through a negative-pressure vertical roof termination instead of an outdoor vent run.

Key Features

• 8-inch vent exhaust size
• Negative-pressure, vertical roof termination
• Usable for covered outdoor installations too

Compatibility

• Hayward Universal H-Series H400FD Low NOx heater
• Does not fit Hayward H500FD or H150FD heaters

What's Included

• 8" vent adapter
• Vent pressure switch
• Jumper wire
• Length of hose

Follow the Hayward Venting Kit Installation Instructions, pages 14-18, for the required ventilation piping layout.