Hayward Universal H-Series Low NOx Natural Gas Heater – 400K BTU
Original price was: $4,999.00.$4,199.00Current price is: $4,199.00.
Free shipping for orders over $35
Delivery for NC residents only
Quantity
Description
The Hayward Universal H-Series 400,000 BTU Low NOx Natural Gas Heater (W3H400FDN) provides robust heating for pools of all sizes and works with any sanitizing system, including saltwater. Its user-friendly L.E.D. control panel offers clear temperature readings and diagnostic information for easy management. Engineered for energy efficiency, the heater’s advanced hydraulic performance reduces circulation pump run time. The exclusive cupro-nickel heat exchanger enhances durability by resisting corrosion and erosion, making it perfect for salt-based pools. An electronic control system ensures consistent water temperature and features self-monitoring technology for optimal operation. With a forced draft system that regulates airflow and voltage adaptability for easy installation, this heater meets environmental regulations. It also includes a 3-year limited manufacturer’s warranty for added peace of mind.
- Ideal for above ground pools up to 33′ Round and 21’x43′ Oval and inground pools up to 45,000 gallons
- Compatible for use with swimming pools utilizing any type of sanitizing system, including saltwater systems
- Easy-to-read L.E.D. control panel provides digital temperature readout and diagnostics
- Industry-leading hydraulic performance saves energy by reducing circulation pump run time
- Exclusive “Totally Managed” cupro-nickel heat exchanger water flow
- Electronic control/display maintains water temperature; monitors heater performance with self-diagnostic capability
- Totally Managed Flow provides exceptional corrosion resistance and erosion protection. Ideal for today’s salt-based electronic chlorination systems
- Forced draft system constantly moves air through the combustion chamber at a precise flow rate
- Designed with 2″ x 2-1/2″ CPVC unions
- Installation is simplified with voltage that adapts to either 110V or 220V
- Environmentally responsible; complies with all current California and Texas air quality emission standards
- 3-Year Limited Manufacturer’s Warranty on parts only (No Labor)
FAQ
How fast is shipping?
Orders placed before 12 PM qualify for same-day delivery! All others are delivered the next day. Fast & Local.
Is shipping really free?
Yes—every order includes free local delivery across North Carolina. No minimums, no hidden fees.
Not sure what you need?
That’s what we’re here for. Message us anytime and we’ll help you figure it out based on your pool type, size, and water conditions.
Can I talk to someone if I have questions?
A detailed answer to provide information about your business, build trust with potential customers, or help the visitor with a problem they may be encountering
Can I return or exchange chemicals?
Due to safety and compliance regulations, we cannot accept returns on chemicals. If you’re unsure about what to order, please reach out first—we’re happy to help.
Is this product safe for my pool?
Yes! All our products meet North Carolina safety standards and EPA guidelines. We only carry what we trust.
What payment methods do you accept?
We accept all major credit cards, Klarna, PayPal, and Cash App.
Can you test my pool water?
Yes! We offer free water testing and can recommend the right products based on your results.
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