Universal H-Series Low NOx Heater 150K BTU - LP - H150FDP



Part # W3H150FDP

By Hayward Pool Products

  5 Average  



Part # W3H150FDP

Warranty 1 Year

Manufacturer Code H150FDP

Product Description

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

Now With Cupro Nickel Heat Exchanger!

NEW Hayward Universal H-Series Low NOx heater combines 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.

It also includes 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 Hayward Universal H-Series 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.


  • 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

Overall Dimensions

Product Specifications

150,000 BTU
0-10,000 ft.
Heat Exchanger:
Cupro Nickel
Special Feature:
Low NOx Emissions

?     Asked on 9/4/2019 by Thomas mcmullen

Do they make a pool spa heater that isn’t effected by chlorine. A common pool chemical.

A  Answered on 9/5/2019 by InyoPools Product Specialist Lennox H.

Hi, Thomas. They do not. This unit does have a cupro-nickel heat exchanger which is one of the most durable materials available. It all comes down to keeping the water balance according to the manufacturer's spec to ensure the unit lasts. 

?     Asked on 7/30/2019 by debra a sandate

how long is delivery?

A  Answered on 7/30/2019 by InyoPools Product Specialist Matt S.

The truckline order delivery window is 5-10 business days from the date of purchase.

?     Asked on 6/9/2019 by Brian

What are the electrical requirements for heater?

A  Answered on 6/9/2019 by InyoPools Product Specialist Patrick P.

The heater is shipped from the factory wired for use with 240VAC, 60 Hz. but it can also be wired 115V by changing the jumpers in the heater. The manufacturer recommends a dedicated 20 amp breaker for this heater.

?     Asked on 3/24/2019 by Abraham Orta

Hello I have a inground pool 15 feet by 30 feet 6 feet deep at one end and 3 feet by the steps square shape. I have a pool heater 175,000 BTU that I need to replace it . I need to replace it with a new one can you please help me pick one I was looking to replace it a Hayward 150,000 BTU would that work for with I have?


A  Answered on 3/30/2019 by InyoPools Product Specialist Lennox H.

Hi, Abraham. A 200K BTU heater like the H200FDP will be a good size unit for your pool and is slightly larger than the one you currently have. 

?     Asked on 1/3/2019 by

Can you use this on a 24 foot round above ground pool at 2800 feet altitude?

A  Answered on 1/3/2019 by InyoPools Product Specialist Kevin G.

Hello, this unit would work well on your pool. 

?     Asked on 5/7/2018 by

Does this heater require 110 or 220

A  Answered on 5/7/2018 by InyoPools Product Specialist Hector F.

These units are dual voltage so can be wired either way. 

?     Asked on 5/3/2018 by

can this work for a 7,000 gallon pool?

A  Answered on 5/3/2018 by InyoPools Product Specialist Lennox H.

Hi, Yes, this heater can be used to heat a 7,000 gallon pool. 

?     Asked on 2/23/2018 by Charles

Is there a venting kit so I can install a H150FDP in an existing shed?

A  Answered on 2/23/2018 by InyoPools Product Specialist Lennox H.

Hi, Charles. They are vent kits that are for this unit, they are listed on the H-Series Low Nox page. 

?     Asked on 6/14/2017 by Jeff

I may need a new heater for a 38,000 gallon outdoor pool. What size would I need? How many BTU's would you recommend?

A  Answered on 6/16/2017 by InyoPools Product Specialist Lennox H.

Hi, Jeff. Heaters are sized based on the pool's surface area. To determine what size heater you'll need to first calculate your pool's Surface Area, then The BTU Size of your Swimming Pool Heater.

?     Asked on 10/17/2016 by

What's the life expectancy of the heater?

A  Answered on 10/18/2016 by InyoPools Product Specialist Alan M.

This heater has a one year warranty from the manufacturer. The heater doesn't have a specific expiration date, but pool heaters can last 10 years or longer.

?     Asked on 7/19/2016 by linda

why is my heater reading LO AND ITS NOT RUNNING

A  Answered on 7/20/2016 by InyoPools Product Specialist Matt S.

According to Hayward, the "LO" error code is referring to a Limit String Open Error." Hayward's explanation for the error, taken from the owner's manual: If the limit string opens the heater shuts down and goes into lockout. Automatic restart is 2 minutes after the error condition is corrected and the limit string closes. Contact a licensed technician to inspect and repair your unit

?     Asked on 5/20/2016 by

If I purchase a propane heater now can it be converted to natural gas at a later date?

A  Answered on 5/21/2016 by InyoPools Product Specialist Patrick P.

Yes this heater can be converted to Natural gas by using the Hayward Conversion Kit (fdxlcnk0002) LP to Natural Gas.

?     Asked on 5/20/2016 by Jim Farley

Can I use the Hayward 150 for an 18 ft round above ground pool?

A  Answered on 5/21/2016 by InyoPools Product Specialist Lennox H.

Hi Jim, This unit can be used to heat an 18ft above ground pool.

?     Asked on 6/18/2015 by Hugo Parra

Hello, how do i determine the size of the heater i will need for my SPA?

A  Answered on 6/18/2015 by InyoPools Product Specialist Patrick P.

Hi Hugo, The main determining factors would be do you need Natural Gas or Propane? How many gallons is your spa? Are you replacing a heater? Or is this a new heater? If replacing a heater what size gas line do you currently have? How quickly would you like to raise the heater 30 degrees? Please email back with the answers to these questions and I can provide you with a heater recommendation.

?     Asked on 4/21/2015 by George

I want to install the Hayward Lownox heater on my pool but I live in the mountains at 3,000 foot elevation; do I need to buy a special high elevation heater?

A  Answered on 4/21/2015 by InyoPools Product Specialist Matt S.

Hello George, The Hayward Universal Low Nox are self adjusting up to 10,000 feet of elevation. Any installation above 2,000 feet will require a special restriction plate to be installed. Luckily, that plate comes standard with every heater so no need to purchase it separately.


Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Pliers, Adjustable Wrench

1     0

old heater was 7 years old and just rusted out

Written on 12/26/2017 by Guest

I love this heater it works great and has a nice low tone to it when its running. The shipping was great, fast shipping and great driver that delivered it to my house. It was very easy to install. I have a small in ground pool in my house about 5000 gallons of water and it was able to raise the temperature 4 degrees an hour while it was 30 degree out side. I am very pleased with my new Hayward 150,000 BTU heater.

Were these instructions helpful? 


Review Summary

 (Average 5  out of 5 stars)
3 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews