Hayward W3HS135FDN is a Universal H-Series above-ground natural gas heater designed for pool and spa heating applications. This 135,000 BTU model features OmniX connectivity for enhanced control, programmability, and diagnostics, along with a cupronickel heat exchanger for durability in demanding water conditions. It is suited for above-ground pool and spa installations requiring dependable gas heat and modern user control.

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Key Features

• Hayward W3HS135FDN is a Universal H-Series above-ground natural gas heater designed for pool and spa heating applications.
• This model is rated at 135,000 BTU for reliable heating performance in compatible above-ground pool and spa systems.
• Integrated OmniX capability supports enhanced programmability, advanced diagnostics, and app-based remote connectivity.
• The cupronickel heat exchanger is designed to provide added protection against corrosion and premature wear in harsh water conditions.
• Universal Display controls provide a consistent and intuitive user interface across standalone and compatible automation setups.
• Front-panel-only service access helps simplify installation, maintenance, and service work without requiring rear access.
• The universal junction box supports either left-side or right-side electrical installation for added setup flexibility.
• This heater includes a plug-in 120 volt power cord design to support easier electrical installation in compatible applications.

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Product Overview

The Hayward W3HS135FDN Universal H-Series Above-Ground Natural Gas Heater with OmniX is built for above-ground pool and spa owners who want dependable gas heat with more modern control capability. Rated at 135,000 BTU, this model combines a compact heater platform with Hayward’s Universal Display and integrated OmniX functionality, making it a practical option for installations that need straightforward operation, improved programmability, and better service visibility. Its natural gas configuration makes it suitable for systems already designed around compatible gas supply and heater placement requirements.

This heater is also designed with long-term durability and serviceability in mind. The standard cupronickel heat exchanger helps improve resistance to corrosion and chemical-related wear, while the front-panel-only access design can make maintenance more convenient in tighter equipment spaces. For above-ground pool and spa applications where heating performance, connected control, and easier service access are important priorities, this model provides a strong equipment solution.