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Hayward Heaters LowNox

23 PRODUCTS TO CHOOSE FROM
Hayward LowNox Thermal Efficiency 84%
Part # Item BTU Gas Ignition Thermostat Price  
H150FDN Universal H-Series Low NOx Heater 150K BTU - NG
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Normally $1,509.00!
150,000 BTU Natural Electronic Dual $1,299.99 Description
H150FDP Universal H-Series Low NOx Heater 150K BTU - LP
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Normally $1,509.00!
150,000 BTU Propane Electronic Dual $1,299.99 Description
H200FDN Universal H-Series Low NOx Heater 200K BTU - NG
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200,000 BTU Natural Electronic Dual $1,569.99 Description
H200FDP Universal H-Series Low NOx Heater 200K BTU - LP
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200,000 BTU Propane Electronic Dual $1,569.99 Description
H250FDN Universal H-Series Low NOx Heater 250K BTU - NG
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Normally $1,940.00!
250,000 BTU Natural Electronic Dual $1,574.99 Description
H250FDP Universal H-Series Low NOx Heater 250K BTU - LP
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Normally $1,940.00!
250,000 BTU Propane Electronic Dual $1,574.99 Description
H300FDN Universal H-Series Low NOx Heater 300K BTU - NG
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Normally $1,995.00!
300,000 BTU Natural Electronic Dual $1,749.99 Description
H300FDP Universal H-Series Low NOx Heater 300K BTU - LP
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Normally $1,995.00!
300,000 BTU Propane Electronic Dual $1,749.99 Description
H350FDN Universal H-Series Low NOx Heater 350K BTU - NG
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Normally $2,099.00!
350,000 BTU Natural Electronic Dual $1,799.99 Description
H350FDP Universal H-Series Low NOx Heater 350K BTU - LP
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Normally $2,099.00!
350,000 BTU Propane Electronic Dual $1,799.99 Description
H400FDN Universal H-Series Low NOx Heater 400K BTU - NG
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Normally $2,309.99!
400,000 BTU Natural Electronic Dual $1,969.99 Description
H400FDP Universal H-Series Low NOx Heater 400K BTU - LP
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Normally $2,309.00!
400,000 BTU Propane Electronic Dual $1,969.99 Description
H500FDN Universal H-Series Low NOx Heater 500K BTU - NG
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500,000 BTU Natural Electronic Dual $2,459.99 Description
H500FDP Universal H-Series Low NOx Heater 500K BTU - LP
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500,000 BTU Propane Electronic Dual $2,459.99 Description

Universal H-Series ASME Vent Kits

Universal H-Series Indoor Vent Kits
Item # Mfg Code Item Diameter Model Type Price  
6223-592 UHXPOSHZ11501 Indoor Pos. Pressure Horizontal 6" Vent Adapter Kit - H150FD
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6 in. H150FD Positive Pressure $285.99 Description
UHXNEGVT11501 UHXNEGVT11501 Indoor Neg. Pressure Vertical 6" Vent Adapter Kit - H150FD
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6 in. H150FD Negative Pressure $173.99 Description
UHXNEGVT13501 UHXNEGVT13501 Indoor Neg. Pressure Vertical 8" Vent Adapter Kit - H350FD
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8 in. H350FD Negative Pressure $173.99 Description
UHXNEGVT15001 UHXNEGVT15001 Indoor Neg. Pressure Vertical 6" Vent Adapter Kit - H500FD
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6 in. H500FD Negative Pressure $235.99 Description

*Please Note: The purchase of any of the above heaters does NOT come with an Indoor Draft Hood. The purchase of an Indoor Draft Hood is required when placing your heater indoors.

Universal H-Series Low Nox Hayward Heaters
For In-Ground Pools and Spas - Electronic Ignition Dual Thermostat

hayward heaters

Now With Cupro Nickel Heat Exchanger!

NEW Hayward Universal H-Series Low NOx haywad heaters combine industry-leading hydraulic performance; environmentally responsible low NOx emissions and a standard cupro nickel heat exchanger with a low profile appearance, lighter weight design, independent left or right side electric, water and gas connections plus 2" x 2 1/2" CPVC union connections to provide the ultimate installation flexibility for new or existing equipment pads.

The Hayward Heaters Low Nox also include a forced draft system that 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.

NOTE: The Universal H-Series hayward heaters meet the NOx Emission standards set by the California South Coast Quality Air Management Commission for 2001 and the Texas Natural Resource Conservation Commission Code.

Hayward Heaters - LoNox Applications:

  • Forced draft system constantly moves air through the combustion chamber at a precise flow rate, eliminating all outside weather variables that can effect the heating performance, such as high wind conditions -- without a high wind stack.
  • 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 set ups.
  • Easy-to-read L.E.D. digital Control Panel provides digital temperature readout and diagnostics for quick identification of components that might need service.
  • New polymer header provides superior hydraulic performance to save energy and protect against the damaging effects of erosion from high flow conditions for improved reliability.
  • Designed for today's larger diameter plumbing systems with 2" x 2 1/2" CPVC unions.
  • 1 Year limited warranty
  • Now with Cupro Nickel Heat Exchanger

Hayward Heaters LowNox - Technical Specifications

Model # BTU Input Gas Type Heater Width Weight
H250FDN 250,000 Natural 28" 165 lbs.
H250FDP 250,000 Propane 28" 165 lbs.
H350PDN 350,000 Natural 33 1/4" 195 lbs.
H350FDP 350,000 Propane 33 1/4" 195 lbs.
H400FDN 400,000 Natural 36 1/2" 197 lbs.
H400FDP 400,000 Propane 36 1/2" 197 lbs.


Hayward Heaters LowNox Overall Dimensions


hayward heaters