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Home Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964
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Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964

Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964 Raypak Digital Natural Gas Pool Heater 336k BTU | Electronic Ignition | P-R336A-EN-C 009218 P-M336A-EN-C 009964
Sale $2,568.91

Parts AvailableParts Available
Platinum Preferred Manufacturer
Purchase Options
  • Raypak Indoor Stack Top 336 & 337 Models | 8" Vent | 009840
    Raypak Rheem 336/337
    Stack Top 8" Venting 009840

The sleek and stylish Raypak Digital Gas Pool and Spa Heater features innovative technology designed to keep your pool or spa at the perfect temperature for your enjoyment. Built to withstand various weather conditions, this modern pool and spa heater is the perfect solution for environments requiring efficiency, convenience and versatility.
Thanks to a brilliant low-profile design, corrosion resistant cabinet made of galvanized metal, copper fin tube heat exchanger, and a bevy of advanced-engineered materials, enjoying your heater year round is a breeze.
Electronic Ignition
Raypak Digital heaters come standard with intermittent spark ignition pilot safety controls. What this means is that the pilot only comes on when there is a call for heat. This is a more energy efficient way to control you heaters gas usage by not having a standing pilot. Raypak has been using the same reliable electronic pilot ignition design for over 20 years.
Microprocessor Controlled Thermostat
The Raypak Digital gas heater comes with a microprocessor based thermostat control. This control allows you to set your pool or spa temperature precisely at your favorite setting just by pressing an up or down temperature control button. The Digital display gives you a constant read out of your pool water temperature. Just set it, and forget it! Truly simple.
Self Diagnostic
Troubleshooting a gas heater has never been easier. The Raypak Digital has on-board diagnostic controls that let the user and the service professional know what is going on with the heater at all times. In the event that you would ever have a problem with the heater, the digital display will show where the problem is in the control circuit. It's like having a service technician built into every heater!
Remote Compatible
The Raypak Digital is compatible with most major pool control and remote systems on the market today. Any two-wire or three-wire remote can connect to the Raypak Digital and be integrated into the pool control system of your choice.
Built-in Wind Resistant Design
The Raypak Digital has the best outdoor design in the market today. With over 50 years in designing and building gas heaters, Raypak has put all that experience into its newest heater design. No need for fans to combat drafting problems, the Raypak Digital was designed for outdoor installations with its exclusive low profile design. It is so thoughtfully and carefully designed it actually protects itself from the things that tend to stifle ordinary pool and spa heaters: falling leaves, wind, airborne debris, rain, downdrafts, updrafts, sleet, snow, etc. In fact it is so efficiently designed it ensures uninterrupted heating performance regardless of all but the most extreme weather conditions. Built Raypak tough. Built to last.
Smart Design
One look will tell you that the Raypak Digital is different! The look is contemporary. The design is advanced. And inside and out it's engineered to last. The attractive forest green and charcoal gray panels complement the latest pool and spa equipment designs. Raypak's original "pagoda top" design will keep the heater operating even in extreme wind conditions and downdrafts
Polytuff Powder Coating
The Raypak Digital has a polyester coated, non-corrosive cabinet that is more durable than solventborne and waterborne coated metal cabinets. Every piece of sheet metal that gets powder coated goes through a 7-stage wash system making certain the powder paint has a perfect bond. Underneath the tough and beautiful finish you will find galvanized metal that offers superior rust prevention and years of durable service.
Polymer Header
The Raypak Digital incorporates the latest in header design technology. Raypak's state-of-the-art engineering department utilized the latest in 3-D computer aided design to engineer the part for optimal performance. Polymer resin headers prevent rust stains from harming your pools surface giving you years of trouble-free swimming pleasure
All Copper Fin Tube Heat Exchanger
All Raypak Digital gas heaters come standard with integral copper finned tube. This means that the fin tubing is made from one piece of extruded copper tube. Since the fins are integral to the tube, maximum heat transfer is attained. Every Raypak Digital has the same robust design tube bundle that we use in our large gas commercial boilers.
Stainless Steel Tube Sheet
Stainless steel tube sheets are used on all Raypak Digital heaters that use the Polymer resin headers. This allows for a completely nonferrous waterway leaving your pool truly rust-free.
CPVC 2" Water Connections
Standard with every Raypak Digital is a set of 2" slip fit CPVC water connections to make your installation secure and effortless.
Condensation Protection
Standard on all Raypak Digital models is Raypak's Unitherm Governor, which helps reduce condensation from low inlet water temperatures. The Unitherm Governor automatically regulates the water flow to help keep the water temperature in the heat exchanger above 105 Degree F. Both water temperature and water flow rate are controlled to eliminate condensation, sooting, and scale buildup that can shorten heater life.
High Flow Rates
No need to worry about large pumps or high flow systems. The Raypak Digital comes with an automatic bypass built into the header. You'll find that the Raypak Digital delivers the industry's lowest pressure drop and highest water flow rate - up to 125 gallons per minute - exceeding the maximum recommended for 2" plumbing systems. More hot water moves through faster and more efficiently.
Fuel Efficient
Efficient? You bet. Energy-smart Raypak heaters consistently achieve the highest efficiency ratings and the Raypak Digital is no exception. It exceeds all federal and state standards.
Burner Tray
Every Raypak Digital burner tray is built to last. From the stainless steel burners to the aluminized metal used in the heat sensitive areas. In the event that anything should happen to your burners they can be quickly and easily serviced. One more reason why the Raypak Digital is made to take the work load year after year.
Fire Tile
A ceramic fiber combustion box keeps your Raypak Digital running efficiently and keeps the outside jacket cool. By using this space-age material the heater won't retain residual heat after it is turned off, allowing it to be installed without the use of costly metal heat sinks.

Brand: Raypak
BTU Rating
Gas Type
Natural Gas
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 30 questions Browse 30 questions and 25 answers
Is this compatible with a salt water de pool?
Gary P on May 11, 2019
Is this comparable with propane?!
A shopper on May 26, 2017
how close can the 300,000 btu unit be from a 5/8" Firecode insulated wall?
Oliver B on Jul 6, 2017
Will a 336k BTU heat a 22,000 gallon above ground pool?
GREG E on Jun 15, 2019
BEST ANSWER: We have a 33,000 gallon pool and this heater will heat it up from 66 degrees to 80 degrees within 24 hours
Can this heater be used with a saltwater pool ?
Daniel R on Aug 13, 2017
BEST ANSWER: Yes - The instruction manual specifically mentions allowable chemistry for saltwater pools (and I have an older smaller version of the same unit being used for one)
Will this heat. 24 ft round pool ? It has 1300 gallons of water
A shopper on May 25, 2019
This Unit shows 82% efficiency? I’m in California and need a minimum of 84% for the Gas Company rebate. What is the true efficiency rating on this unit - or, where can I find it?
A shopper on Mar 24, 2018
BEST ANSWER: 82% as listed on its sticker

100% efficient when unplugged ;)
can this be used for indoor use?
A shopper on Jun 17, 2019
how many gallons will this heat? we are having a 20x40 rectangle pool installed with 6ft deep at the deepest 3 ft in the shallow
sharmayne r on Jun 21, 2017
BEST ANSWER: We bought this heater for a 20 x 40 pool with a 10 foot deep end and 4 foot shallow end. It heats the pool very easily and we have been pleased with the choice of heater.
Is there any electrical connections necessary to install heater where we would need an electrician?
jim g on May 6, 2016
BEST ANSWER: Depends on your skill level. My pool breaker box was only 4 feet from unit. I picked up a hot line and ran a conduit across ground to hook up. Fairly easy if you are comfortable with wiring. My old unit had a gas pilot lite. Have had heater for almost 2 years and I love it! Erik
I have an old raypak versa with 399k btu input and 299k btu ouput. I would like to know whats the best new model for its replacement?
A shopper on Feb 8, 2016
BEST ANSWER: I recently replaced an 8-year old Raypak (which had corroded because I mistakenly fed 3inch chlorine tablets directly to the skimmer) with this equivalent unit. I have an indoor pool and the heater works 365 days a year. I have been totally satisfied with its performance.
Are you able to have the inlet/outlet headers on the either side of the unit?
Robert K on Aug 11, 2021
BEST ANSWER: That would be a special design issue. Most come with inlet on left and outlet on right. I know of no other configuration
Does this model need a firemans switch?
A shopper on Aug 11, 2021
BEST ANSWER: This model can easily accommodate a fireman's switch, which I, in fact, connected from my pump timer. Is it needed? Not absolutely. But I do recommend it so that the heater doesn't suddenly shut down in the middle of a heating cycle when the pump shuts off and stops circulating water through it, at which point the neater instantly shuts off, as it should, due to low water pressure. With the fireman's switch in the series circuit, the heater shuts down about 20 minutes before the pump does so that water will continue to circulate through it whether it was in a heating cycle or not.
Is this unit good for a 30,000 gallon in ground pool and spa?
Roberto on Mar 12, 2021
BEST ANSWER: We use this heater for a 40000 gallon pool and spa. You could probably use this one or a smaller one. We used this one because it was the exact model we had before and the connections were all in place.
what does CLK mean on digital display?
A shopper on Jun 24, 2021
BEST ANSWER: On mine its Clock/Fireman Sw - time clock/fireman switch is open
what is the weight of this heater?
clyde p on May 6, 2020
BEST ANSWER: About 150lbs
what are the dimensions of the P-R336A-EN-C 009218 ?
Albert M on Apr 6, 2019
BEST ANSWER: The dimensions are in the link below.

What size concrete pad will I need for the 336k Raypak natural gas replacing my 25 year old 336k model?
A shopper on Oct 17, 2018
BEST ANSWER: I have a very large pad but the foot print was almost exactly the same - we replaced some of the existing gas fittings, but did not need extensions or modifications to the existing gas or water pipes. I replaced basically the same model that you are replacing.
Is this the model with Capron headers ?
A shopper on Jan 11, 2018
BEST ANSWER: The headers are polymer
Can this be used on above ground pools? Is it in stock?
A shopper on Apr 21, 2022
what is the size recommended for a 12,000 gal. vinyl in-ground pool?
A shopper on Nov 1, 2021
How can I get an owners manual?
Juri M on Jun 1, 2020
Is this unit in stock and how long will it take to ship to OK?
Z I on May 20, 2020
My heater keeps blowing transformers?
A shopper on Jun 15, 2019
Can this be used with above ground pools?
A shopper on May 27, 2019
Do you have this with cupronickel?
Rebecca B on May 10, 2019
Our community pool at capacity is 85,000US gallons.What size boiler do you recommend?
Duane B on Apr 26, 2019
I currently have a Raypak P-R335A-EN heater with a 1/2" gas line and want to replace it with a new P-R336A-EN. Can I still use a 1/2' natural gas pipe connection with a reducing fitting?
Rene M on Jun 9, 2018
Is this a replacement for P-m336a-fn-c ?
Kidd C on May 1, 2018
can it be vented for indoor use ?
gary o on Feb 24, 2018
4.3 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
pool heater
Great price and easy installation for our plumber. Our bills are half as much as they were with our old heater. Easy hookup, relatively small size, everything I hoped for.<br>
March 9, 2017
Rated 5 out of 5
Highly recommend.
Our Raypak heater was perfect! The people I talked to were very helpful in selecting the perfect product for our pool. I will be sure to use Pool Supply Unlimited again.
June 24, 2017
over 4 years ago
Rated 5 out of 5
I couldn’t be happier
I couldn’t be more happy with the unit. It is a replacement for a nineteen year old heater that served us well. As it turned out it was a direct replacement for our old model and was easy to install
June 14, 2020
over 2 years ago
Rated 4 out of 5
No more Junk
We have about 30,000 gallons and this heater is great.Heats up the pool so much quicker than my old junky heater.Excellent purchase!
January 6, 2015
Rated 5 out of 5
Quick delivery, simple to put in myself , easy to operate and so quiet I wasn’t sure it was running to begin with
April 10, 2020
over 2 years ago
Rated 5 out of 5
Perfect Replacement!
Great heater and easy to install. This replaced our old one. Fair price and fast delivery! Thanks PoolSupply Unlimited!
November 23, 2021
6 months ago
Rated 5 out of 5
Happy customer . Heats amazingly fast . Pricey but worth the upgrade. Definitely recommend to anyone in the market.
Me and hubby are very happy. Love ?? how fast this heater heats our 55 thousand gallon pool with no effort.
December 23, 2021
9 months ago
Rated 5 out of 5
Great heater. Super easy to install. I replaced a 17 year old version of the same heater with this one and it took me about 3 hours.
June 19, 2021
1 year ago
Rated 4 out of 5
seems good
Just installed on Sat,5/30/20, need installer to come back, turned it on, making a slight screeching noise, so I shut it off, hope this can be fixed, as it was a big expense
June 2, 2020
over 2 years ago
Rated 4 out of 5
Heater was shipped and arrived in good shape. The delivery truck would only leave heater on the street and provided no help getting to my door. If I had been told in advance they would do that I could have planned.
Heater was similar to last so fit and installation went well.
March 27, 2021
1 year ago
Extended Warranty Program
Raypak pool and spa heaters are engineered to perform and built to last. The brand you know and trust is bringing you more peace of mind with a 2-year extended warranty on residential pool and spa heating products. If not registered, warranty is only 90 days.
The benefits of Raypak's extended warranty, include:
  • 2-year extended warranty
  • Professional in person service
  • 24-hour or same-day service
  • Genuine Raypak parts
  • Factory technical support
The product registration process is quick and easy to complete. To take advantage of the extended warranty follow these steps:
  1. Have your pool or spa heater professionally installed. Click here for a list of Raypak installation partners.
  2. Register your product online at www.raypak.com/warranty within 90 days of installation.
Warranties are effective for products installed on or after June 17, 2019. See product warranty for specific details. Conditions apply. For full warranty by product including exclusions and how to make a claim, please visit www.raypak.com/warranty.
This information was updated on 4/23/2022. For the most current information and full warranty policy please visit www.raypak.com.

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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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