TheHayward HDXFINVNT400 Direct Vent Kitis designed for theHDF400 Universal H-Series Low-NOx Pool and Spa Heater, providing safe and efficient direct indoor venting. Built for reliable performance, this OEM kit allows combustion air to be drawn from outside the installation area, helping support proper operation, improved efficiency, and compliance with ANSI and CSA safety standards.
This complete vent kit includes the essential components needed for installation, such as the fan assembly, wiring harness, blower coupler, pipe clamps, fuel/air mixers, labels, screws, and detailed instructions. With bothnatural gas and propanemixer options included, the HDXFINVNT400 offers added flexibility for different fuel setups.
Manufactured with durability and safety in mind, this kit is assembled in the USA and is intended for use only with compatible Hayward Universal HDF series heaters. For best results and safe operation, installation should always be completed by a qualified technician.
Features & Benefits:
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Designed for Hayward HDF400 400,000 BTU heaters
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Enables safe direct venting for indoor applications
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Pulls combustion air from outside the installation area
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Complete OEM kit with all necessary installation parts
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Includes natural gas and LP fuel/air mixers
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Built for dependable, long-term performance
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Assembled in the USA
Kit Contents:
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Water side top panel with installed fan assembly
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Direct vent wiring harness
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Blower inlet rubber coupler
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Pipe clamps (2)
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LP fuel/air mixer for HDF400 units
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Natural gas fuel/air mixer for HDF400 units
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Field conversion labels (2 English, 2 French)
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Direct vent installation instructions
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Extra sheet metal screws (10)
Installation Notes:
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Must be installed by a qualified technician
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Use only with Hayward Universal HDF series heaters
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Inlet venting should be assembled with 3″ SCH40 PVC pipe
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Do not operate on propane without the correct LP fuel/air mixer installed
Warning:Improper installation may result in fire, explosion, or carbon monoxide hazards. Always follow the included instructions and all applicable local codes.
