Hayward Universal H-Series Low NOx Swimming Pool Heater, Propane Gas, — Discounter's Pool & Spa Warehouse Skip to content
Effective June 11, 2021, all our stores are open for walk-in shopping with capacity restrictions in place. We continue to offer CONTACTLESS STORE PICKUP at all of our locations. Home deliveries can be expected to arrive within 7-14 days. In-store pickup orders are typically prepared within 1-5 days.
Effective June 11, 2021, all our stores are open for walk-in shopping with capacity restrictions in place. We continue to offer CONTACTLESS STORE PICKUP at all locations. We are currently experiencing some delays.

Hayward Universal H-Series Low NOx Swimming Pool Heater, Propane Gas, 400,000 BTU - W3H400FDP

Home Delivery Only
Sold out
$3,449.00
SKU 14000012

Hayward Universal H-Series Low NOx Heater 

  • Standard cupro nickel heat exchanger
  • Excellent salt water and chemical corrosion resistance
  • Exclusive ‘Totally Managed’ cupro nickel heat exchanger water flow
  • Same water velocity through all tubes for faster heating
  • Patented header by-pass design
  • Up to 18% savings by reducing pump run-time
  • 2″ x 2 1/2″ CPVC union plumbing connections
  • Common union for installation or service, adapts to larger plumbing recommended for greater efficiencies
  • Low NOx emissions – meets clean air quality standards
NEW Forced Draft System constantly moves air through the combustion chamber at a precise flow rate. As a result, all outside weather variables that can affect the heating performance, such as wind conditions, are eliminated - without having to install a high-wind stack. 

State-of-the-Art Finn Plate Heat Exchanger with Cupro Nickel
Our patented single header "V" baffle design heat exchangers allow for long life, fast heating and virtually no condensation. All Hayward heat exchangers are now constructed with highly resilient Cupro Nickel for greater durability and longevity even in salt-based, high flow or aggressive water chemistry environments.


BTU Rating Heater Width
Vent Diameter
150,000 21-1/2" 6"
200,000 24-3/4" 7"
250,000 28" 7"
300,000 30" 8"
350,000 33-1/4" 9"
400,000 36-1/2" 9"


Gas heaters boast the ability to produce heat quickly which makes it a popular choice amongst pool owners. 

Gas heater units are designed for both above ground pools and in-ground pools. Gas pool heaters also come in Electronic or Millivolt (Standing Pilot) versions. Electronic versions are like a modern gas boiler and feature electronic spark ignition and micro processor control, thus giving you complete control of your pool temperature at the push of a button. Millivolt models are a traditional technology which uses a permanent pilot light and therefore is slightly less efficient, however does not require electrical service.

So whether it is an in-ground pool heater your require or an above ground pool heater, we are ready and stocked waiting for you!

Warranty

Hayward Commercial’s Universal H-Series ASME gas heaters now have a 1-year warranty when purchased online. Warranty is extended to 3 years when purchased in store. 

Venting

Based on heater location and venting requirements, the venting configuration will vary. 

Useful Parts

 BTU Rating 
Indoor Draft Hood
Indoor Adapter Kit
Indoor Elbow Adapter
Indoor Termination Cap
Outdoor Wind Stack
150,000
200,000

250,000

300,000

HWS300
350,000

400,000

 

Manuals

OWNERS MANUAL

SERVICE AND INSTALLATION MANUAL

PARTS 

Manuals

Parts

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