Hayward W3H135FDN Universal H-Series natural gas above ground pool and spa heater, 135,000 BTUHayward Universal H-Series Above Ground Pool and Spa Heater, Natural Gas, 135,000 BTU, Low NOx, W3H135FDN$2,39900 Web Price
Hayward W3H135FDN Universal H-Series natural gas above ground pool and spa heater, 135,000 BTU
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Hayward Universal H-Series Above Ground Pool and Spa Heater, Natural Gas, 135,000 BTU, Low NOx, W3H135FDN

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Quick overview

  • 135,000 BTU The rating that drives the H-Series speed to heat, so the pool or spa is usable sooner.
  • Cupro nickel heat exchanger Standard, not an upgrade, and the reason the heater tolerates unbalanced water chemistry that corrodes lesser exchangers.
  • Natural gas, Low NOx Runs on natural gas and meets Low NOx emissions.
  • Built for above ground Sized and set up for above ground pools and spas.
  • Electronic control panel Quick to set and read, so owners are not fighting the controls.
  • Hydraulic performance H-Series heaters lead on hydraulics, which means less back pressure on the pump.
Full description and specifications ↓

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Universal H-Series Above Ground Pool and Spa Heater, Natural Gas, 135,000 BTU, Low NOx, W3H135FDN

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Product details

The Hayward Universal H-Series W3H135FDN is a natural gas pool and spa heater rated at 135,000 BTU, built for above ground pools and spas and meeting Low NOx emissions.

Speed to heat

H-Series heaters combine strong hydraulic performance with the 135,000 BTU rating, and the two together are what shorten the wait before the water is usable. Better hydraulics also mean the heater puts less back pressure on the pump, so the whole system works less hard for the same result.

The cupro nickel exchanger

The heat exchanger is cupro nickel as standard. Pool water that drifts out of balance is what kills gas heaters, attacking the exchanger from the inside until it fails early. Cupro nickel resists that, which is why the same heater keeps performing season after season on real world water rather than ideal water.

Operation and delivery

The electronic control panel is straightforward to set, so owners spend less time at the panel. The heater ships by freight.

Specifications
Brand Hayward
Manufacturer part number W3H135FDN
UPC 0610377407113
Type Gas pool and spa heater
Series Universal H-Series
Fuel Natural gas
Heating capacity 135,000 BTU
Emissions Low NOx
Heat exchanger Cupro nickel
Application Above ground pools and spas
Controls Electronic control panel
Shipping weight 117 lb
Ships Freight

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Questions and answers

What people ask about this product, answered by our pool techs.

What fuel does it burn?
Natural gas. It is the natural gas version of the Universal H-Series above ground heater.
How big is it?
135,000 BTU, which Hayward pairs with the H-Series hydraulics for faster speed to heat.
Why does the cupro nickel heat exchanger matter?
Cupro nickel resists the corrosion and premature failure that unbalanced water chemistry causes. Hayward fits it as standard on H-Series rather than selling it as an upgrade.
Is it for above ground pools only?
It is built for above ground pools and spas.
Ask your own question