Hayward A/G Pool Heater 100000 BTU LP - H100IDP1



Model # H100IDP1

By Hayward Pool Products

  4 Average  



Model # H100IDP1

Product Description

Rated for up to 2000' elevation

Hayward has developed an induced draft heater for above-ground pools and spas that combines state of the art technology with ease of operation and superior performance.

Featuring an electronic, direct spark igntion system and an energy-efficient FireTile lined combustion chamber, the Hayward heater provides 100,000 BTU input, while delivering 81% thermal efficiency and quick heating.

An integral induced draft system makes this heater completely impervious to any high wind situations. A one-piece copper header/heat exchanger provides for leak-free performance. And a simple plug-in 120 volt electric cord is provided for simple installation.


  • Outdoor Use Only
  • Aboveground Pools
  • Spas (above 70 GPM an external bypass is recommended)
  • Flow Rating 20 - 70 GPM's


  • 100,000 BTU input for above-ground pools and spas of all types and sizes
  • Electronic, direct-spark ignition for total control and automatic operation
  • Revolutionary induced draft technology ensures optimum heating and all-weather performace, even in high wind situations.
  • Reduced emissions design provides environment-friendly heating
  • FireTile combustion chamber ensures quick heating
  • Jet ported Eugenox burners provide long life and easy maintenance
  • One-piece copper header/heat exchanger for leak-free performance
  • Cool-to-the-touch cabinet surface temperature ensures worry-free use
  • Plug-in 120 volt electric cord for easy installation


  • Includes test strip kit for fast and accurate testing of water chemistry

Product Specifications

100,000 BTU
Cord Length:
3 ft.
Plug Type:
120 V

?     Asked on 8/23/2018 by steve

how much propane does it take to heat a 54inc x 12 foot round Above ground pool per degree

A     Answered on 8/25/2018 by InyoPools Product Specialist Lennox H.

Hi, Steve. A gas heater will use 1 gallon of propane for every 100,000 BTU. You can get a 2 degree or higher temperature increase an hour using this unit. 

?     Asked on 6/8/2018 by tom

my heater won't ignite. when I turn it on the fan spins, I smell gas and I here one click. should I here continuous clicks

A     Answered on 6/9/2018 by InyoPools Product Specialist Lennox H.

Hi, Tom. With this unit, you should only hear one click. If ignition does not happen within 10 seconds of the gas valve opening, then unit's module will lock. Then you will have to reset it.

?     Asked on 5/28/2018 by Michael

Hi, I have a 18' - 10,000 gallon round above ground pool. What electric heater would be best for this? Also, do we just plug this unit in or does it also need propane or natural gas? I only want a unit that plugs in. How much will it heat this pool?

A     Answered on 6/2/2018 by InyoPools Product Specialist Alex V.

Michael, This is an electronic ignition propane heater. You will need a propane tank in addition to this heater. We do not have electric heaters. We do carry electric heat pumps

?     Asked on 5/21/2018 by Joyce McNally

Is a 100,000 BTU natural gas heater good for a 24x52 pool?

A     Answered on 5/22/2018 by InyoPools Product Specialist Lennox H.

Hi, Joyce. It can base on the desired temperature and how fast you want it to reach that temperature. This unit will get you a 3/4°F temperature increase per hour. 

?     Asked on 5/21/2018 by

Hi my name is Paul looking for cheapest electric heater for 30000 pool and does your company install

A     Answered on 5/22/2018 by InyoPools Product Specialist Lennox H.

Hi, Paul. For a 30,000 gallon pool, I would recommend a 140K BTU Heat Pump which is powered by electricity. We do not install pool equipment.

?     Asked on 2/25/2018 by Jose

Hello , I have a 18x33 oval and I’m in the carribean. What would be the best way to keep the pool heated? 100 lb propane costs $80 and the cost of electricity is .40 cents a kilowatt hour.

A     Answered on 2/26/2018 by InyoPools Product Specialist Kevin G.

Hello, due to your high energy costs and position in a warm climate, your most cost-efficient heat source would be a solar heater. If you visit this link, it will show you how to follow this route.  

?     Asked on 7/25/2017 by Julie

I am getting a 18' x 52" round pool installed in a couple weeks. I live in Minnesota so I feel a heater is necessary to extend our swim season. They are very expensive from the pool store I purchased the pool from and it does not include any installation. Should I get a propane or run a gas line and do you have a suggestion for the best size heater for the pool. Is propane easy to fill? Thank you for any help.

A     Answered on 7/30/2017 by InyoPools Product Specialist Alex V.

Julie, A 100k btu heater will be fine for an 18' round solid wall abg pool. The choice between natural gas and propane will depend on what will be easier to install. Keep in mind that you will have to have a propane tank installed on your property for the propane heater. 

?     Asked on 7/20/2017 by Sandra

What do I need to install? The hoses I have are too small.

A     Answered on 7/20/2017 by InyoPools Product Specialist Alex V.

Sandra, You can plumb the heater with 1.5" pvc if you would like. Please note that this is a propane heater. 

?     Asked on 7/19/2017 by jet

What is the size of the opening for the inlet and outlet connections from the heater to the pool? And are they adaptable?

A     Answered on 7/21/2017 by InyoPools Product Specialist Lennox H.

Hi, Jet. This unit has 1-1/2" ports and is adaptable. 

?     Asked on 7/19/2017 by Jet

Is a 120v plug 110 or 240 plug in? and Do you need to run the heater continuously to maintain an even temp? Can you put it on a timer?

A     Answered on 7/21/2017 by InyoPools Product Specialist Lennox H.

Hi, Jet. This unit is 120 volts only, the heater will run only when it calls for heat and when the pump is running. You can put on a timer but it's not necessary. 

?     Asked on 7/19/2017 by Jet

Does this heater have to be covered?

A     Answered on 7/19/2017 by InyoPools Product Specialist Alex V.

Jet, The heater does not have to be covered. 

?     Asked on 6/29/2017 by Alyson Stockham

Interested in a propane heater for our 15' above ground pool. Do they have their own pumping system or do you need to provide one?

A     Answered on 7/2/2017 by InyoPools Product Specialist Alex V.

Alyson, The heater needs water flow from your existing pump and filter system. Please make sure that your pump is large enough to provide adequate flow. 

?     Asked on 6/6/2017 by Sarah

Considering getting heater for 10,000 gal 15x30 oval AG pool, not sure what the proper amount of BTU'S would be needed and what would be more cost effective propane or heat pump ?

A     Answered on 7/31/2017 by InyoPools Product Specialist Alex V.

Sarah, A 100k btu heater would be fine for a 15x30 abg pool. The cost efficiency would depend on what propane costs vs what electric costs in your area. 

?     Asked on 5/3/2017 by

Looking into buying this heater. we have a 18ft above ground x 54". our pool is in a shady area and rarely sees sun. will this heater work to warm up the pool? and how long will it take to warm up? and how long does a 100lb or 23 gallon propane tank last for this size pool?

A     Answered on 5/3/2017 by InyoPools Product Specialist Stacey M.

Hello, The H100IDP1 would be good to heat your above ground pool, I would recommend a solar blanket to lock in more heat so you don't have to run your heater that long.  How long would it take to heat up your pool? That is depending on what temperature you would like it, anywhere from 12-24 hours if you are running that whole time GPM (gallons per minute) on this heater is 20-70 so for an 8hour turnover rate should be good in about 12 hours. We cannot determine how long that would last.

?     Asked on 3/29/2017 by michael

21,000 gal pool what size propane heater would I need? do you still keep it plugged in once the propane is lit.aproximately how long to heat the water..

A     Answered on 3/31/2017 by InyoPools Product Specialist Scott W.

For that size of pool I would not recommend a heater smaller than the 300,000 BTU model, H300FDP, but for a pool I usually recommend a heat pump because it is more cost efficient. The heat pump I would recommend for your pool size would be part number HP21404T.

?     Asked on 11/9/2016 by

We are thinking of putting in a pool around 15,000 gallons. He have a 2 yr old H100ID Haywood heater on our in ground spa, can we use it to onour pool?

A     Answered on 11/9/2016 by InyoPools Product Specialist Megan C.

I best recommend a larger heater or heat pump for better efficiency of heating the water. I have added a few links that you will find helpful. How Much Does it Cost to Run My Pool Heater? How to Select an Above Ground Pool Heater and Inground Pool Equipment Selection Part 3 -Heaters.

?     Asked on 10/16/2016 by Dondrea Dondrea Prine Thompson

Can this be use on salt water pools ?

A     Answered on 10/17/2016 by InyoPools Product Specialist Lennox H.

Hi. Yes, this unit can be used with a saltwater pools.

?     Asked on 9/16/2016 by Dennis Powers

Hi, I purchased this heater in the spring. Works great! For winterization the manual just says to drain it. What's the procedure to drain it? thanks, Dennis

A     Answered on 9/23/2016 by InyoPools Product Specialist Lennox H.

Hi Dennis. Once the plumbing connections are removed from the unit, tilt the unit forward to drain the water out of the heat exchanger.

?     Asked on 8/11/2016 by Brad

My customer has a small round acrylic spa that holds approximately 300 gallons of water at an off-grid house so I need a small propane heater to convert it from electric heat. What's the smallest LP gas heater made with electronic ignition?

A     Answered on 8/12/2016 by InyoPools Product Specialist Scott W.

That would be the correct heater for your set up and needs.

?     Asked on 8/10/2016 by Chuck Olson

Will the H100IDP1 work with a standard 100# propane cylinder? I have a small 16' x 4' pool that I'll take down in the fall. I want to locate the heater close to the pool. What would I need to do for the propane hookup?

A     Answered on 8/10/2016 by InyoPools Product Specialist Scott W.

Yes Mark, that will work with your current set up.

?     Asked on 8/5/2016 by Chris.

I bought this heater 014786 - RayPak 156A Digital Control - 150K BTUs - Propane, ELE (0-1999 FT). Is this a decent heater?

A     Answered on 8/5/2016 by InyoPools Product Specialist Scott W.

That a good heater just as long as it the correct size for your pool. If it's undersized then it will appear like it's not working very good.

?     Asked on 8/5/2016 by chris

I have a 24 ft round above ground pool. What propane heater do you recommend?

A     Answered on 8/5/2016 by InyoPools Product Specialist Alex V.

Chris, A 100-150k btu heater would be a good size for your pool.

?     Asked on 7/11/2016 by sandy

Can this heater be used on a in-ground pool with spa attached? I just want to heat the spa

A     Answered on 7/17/2016 by InyoPools Product Specialist Lennox H.

Hi Sandy, This unit can be used to heat a small spa if the installation requirements are met.

?     Asked on 6/24/2016 by

why does this gas heater have electric cord

A     Answered on 6/30/2016 by InyoPools Product Specialist Lennox H.

Hi, This unit is equipped with and electronic spark igniter which requires 120 voltage to power the controls.

?     Asked on 6/6/2016 by

Can I use this heater at an altitude of 2600 feet?

A     Answered on 6/6/2016 by InyoPools Product Specialist Lennox H.

Hi, This unit can not be used at an altitude of 2600 feet. You will need the RayPak 156A Digital Control - 014787 heater.

?     Asked on 6/2/2016 by Nick

How long does it take to heat approximately 7100 gallons of hose water to 80 degrees?

A     Answered on 6/2/2016 by InyoPools Product Specialist Patrick P.

On a 7,000 gallon pool you can expect a 10 degree temperature rise over an 8 hr. time period running the heater.

?     Asked on 4/29/2016 by TERRY


A     Answered on 4/30/2016 by InyoPools Product Specialist Lennox H.

Hi Terry, A 100 lb propane tank holds about 23.6 gallons of propane, and this unit can use about 1 gallon an hour to heat your pool. That that will provide you with 23 hours of heating time.

?     Asked on 6/21/2015 by Judy

Why do some of heaters have an altitude rating. We are at 5500ft outside of Denver & that is reason for heater. Having hard time heating pool even tho closer to sun, but have cool nights.

A     Answered on 6/22/2015 by InyoPools Product Specialist Lennox H.

Judy, You can read about why some heaters have altitude ratings at our blog titled, Do I Need a High Elevation Heater? The Hayward A/G Pool Heater 100000 BTU LP is only rated for up to 2000 ft, you will need the RayPak 106A Analog Control - 105K BTUs - Propane, ELE (4000-6999 FT)

?     Asked on 5/29/2015 by Brittney

We just bought aHAYWARD 100k BTU PROPANE GAS POOL HEATER H100IDP1 for our 18 ft above ground pool. What size propane tank do we need and where should we but it? What other parts do we need to buy in order for this to work??

A     Answered on 5/29/2015 by InyoPools Product Specialist Patrick P.

Hi Brittney, The best bet would be to contact a local propane company and they will be able to size the best tank for you and do the hooking up of the propane lines.

?     Asked on 2/6/2015 by Jamie

What propane heater would you recommend for a 26' above ground heater with a salt system. thank you, jamie

A     Answered on 2/9/2015 by InyoPools Product Specialist Robert M.

Hello Jamie - We would recommend the 266k BTU Raypak model with the cupro-nickel heat exchanger. The model is 014951.

?     Asked on 1/22/2015 by Murguy

I would like to use the propane heater for off the grid application and I see it has a 120v plug. So is this for a circulating pump or ignition purpose and does it use a lot of power.

A     Answered on 1/23/2015 by InyoPools Product Specialist Alex V.

Murguy, You will need approx. 70 gpm through the heater for it to run. The "electric" on the heater is used to create spark ignition. Electric costs will vary depending on usage and cost (kwh) but can range from $75-$500. per month.

?     Asked on 10/8/2013 by Guest

Where can my heater be installed?

A     Answered on 10/8/2013 by InyoPools Product Specialist Patrick P.

There are specific venting requirements and clearance distances that must be met to ensure proper operation. Consult the owner’s manual for exact specifications for your model of heater.NOTE: Gas fired heaters should be diagnosed and repaired by trained personnel.

?     Asked on 4/20/2013 by Guest

How long will a propane tank last with the Hayward H100IDP1 heater?

A     Answered on 4/20/2013 by InyoPools Product Specialist Patrick P.

It would be difficult to say for certain how long a propane tank would last. The amount of time will vary based on temperature, size and use.

?     Asked on 1/22/2013 by Guest

Can the Hayward H100 heater be converted from propane to natural gas?

A     Answered on 1/22/2013 by InyoPools Product Specialist Patrick P.

Yes, to convert from propane to natural gas , you would need part #IDXCNK1934.

?     Asked on 10/10/2012 by Guest

What is the difference between an Electronic and Millivolt ignition?

A     Answered on 10/10/2012 by InyoPools Product Specialist Patrick P.

The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.

?     Asked on 12/29/2011 by Guest

How do you know if a pool heater is a propane heater or a natural gas heater?

A     Answered on 12/29/2011 by InyoPools Product Specialist Patrick P.

Typically in the product name we use the abbreviation of "LP" for propane or "NG" for natural gas. Click here for a full listing of our >Pool Heaters.


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