Product Overview

The Hayward Universal H-Series Natural Gas Heater W3H200FDN is a 200,000 BTU pool and spa heater designed to deliver dependable, efficient heating for residential in-ground pool and spa applications. Built on Hayward’s Universal H-Series platform, this heater combines strong natural gas performance with flexible installation, durable construction, and easy-to-use digital controls.

Featuring a cupro nickel heat exchanger, Low NOx emissions design, and forced-draft combustion system, the W3H200FDN is engineered for fast, reliable heat-up performance while helping protect against corrosion caused by challenging water chemistry conditions.

Reliable Heating for Pools and Spas

The Universal H-Series 200K BTU heater helps raise and maintain comfortable pool or spa water temperatures. Whether used to extend the swimming season, warm water on cooler days, or provide quick heating for a spa, this heater delivers dependable on-demand performance when properly sized and professionally installed.

Its 200,000 BTU heating capacity makes it a practical option for residential pool and spa systems that require more heating power than smaller gas heater models.

Universal Installation Flexibility

The Hayward Universal H-Series is designed for flexible installation and service. Its compact, low-profile cabinet and adaptable connection layout make it a strong choice for both new equipment pad installations and heater replacement projects.

This model is well suited for residential pool owners who want a durable natural gas heater with dependable heating performance and straightforward operation.

Ideal For

Residential in-ground pools

Attached spas and pool/spa combinations

Mid-size residential pool heating applications

Homes supplied with natural gas

Saltwater pools with properly balanced water chemistry

Replacing an older natural gas pool heater

Pool owners wanting faster heating than solar alone

New equipment pad installations

Installations requiring 120/240 V compatibility

Key Features

Genuine Hayward Universal H-Series natural gas heater

200,000 BTU heating capacity

Natural gas fuel configuration

120/240 V electrical compatibility

60 Hz, single-phase operation

Designed for residential in-ground pools and spas

Low NOx emissions design

Cupro nickel heat exchanger for enhanced corrosion resistance

Forced-draft combustion system for consistent heating performance

Digital LED control panel for simple operation

Electronic ignition system

Universal-style design for flexible installation

Compact, low-profile cabinet

Designed for left-side or right-side water, gas, and electrical connections

Compatible with saltwater pools when properly maintained

Built for new installations and heater replacement applications

Benefits

Fast, Dependable Heating: The 200K BTU output provides strong heating performance for residential pools and spas, helping customers enjoy more comfortable water temperatures.

Natural Gas Performance: Natural gas provides consistent heat output, making this heater a reliable choice for homes with natural gas service.

Corrosion-Resistant Construction: The cupro nickel heat exchanger helps resist corrosion and premature wear caused by unbalanced water chemistry, saltwater systems, and demanding pool environments.

Cleaner Low NOx Operation: The Low NOx design helps reduce emissions and supports use in many areas with stricter clean-air requirements.

Easy Temperature Control: The digital LED control panel allows pool owners to adjust and monitor heater operation with ease.

Flexible Replacement Option: The Universal H-Series design helps make the W3H200FDN a practical replacement choice for many existing pool heater installations.

Specifications

What’s Included

• One Hayward Universal H-Series Natural Gas Heater, 200K BTU
• Digital control system
• Cupro nickel heat exchanger
• Electronic ignition system
• Factory-installed heater components
• Manufacturer documentation, where supplied by packaging

Gas line components, venting materials, electrical whip, plumbing fittings, equipment pad materials, and installation labor are not included unless specified separately.

Warranty & Compatibility

The Hayward W3H200FDN is designed for natural gas pool and spa heating applications. It is commonly used for residential in-ground pools and spas when properly sized for the pool volume, desired temperature rise, plumbing flow, and local climate conditions.

Before ordering, confirm:

• Fuel type: Natural gas
• Heating capacity: 200,000 BTU
• Electrical requirements: 120/240 V, 60 Hz, single phase
• Gas line sizing and supply requirements
• Pool size and desired heat-up time
• Plumbing flow rate requirements
• Ventilation and installation clearance requirements
• Local gas, plumbing, electrical, and building codes
• Professional installation requirements

This heater should not be used with propane unless the heater model is specifically configured for propane gas.

Customer-Facing Q&A

Q: What type of fuel does the Hayward W3H200FDN use?
A: The W3H200FDN uses natural gas.

Q: How many BTUs is this heater?
A: This heater is rated at 200,000 BTU.

Q: What voltage does this heater require?
A: The W3H200FDN is designed for 120/240 V, 60 Hz, single-phase electrical operation.

Q: Is this heater for pools or spas?
A: This heater is designed for residential in-ground pools and spas when properly sized and installed.

Q: Does this heater have a cupro nickel heat exchanger?
A: Yes. The W3H200FDN features a cupro nickel heat exchanger for enhanced corrosion resistance.

Q: Is this heater compatible with saltwater pools?
A: Yes. It can be used with saltwater pools when the pool water is properly balanced and maintained.

Q: Is this a propane heater?
A: No. This model is configured for natural gas. Do not use it with propane unless the heater model specifically supports propane.

Q: Does this heater require professional installation?
A: Yes. Gas pool heaters should be installed by qualified professionals according to local gas, electrical, plumbing, and building codes.

Q: What is the barcode for this product?
A: The UPC / Barcode is 0610377406857.