Home Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 400,000 BTU | EC-462029
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Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 400,000 BTU | EC-462029

Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 400,000 BTU | EC-462029 Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 400,000 BTU | EC-462029 Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Propane - 400,000 BTU | EC-462029

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Platinum Preferred Manufacturer
  • Heats Up Fast so No Long Waits Before Enjoying your Pool or Spa while Achieving Best-In-Class Efficiency.
  • High Efficiency Rating Makes these Heaters Extremely Economical to Operate.
  • Rotating Digital Display Allows for Easy Viewing.
  • Tough, Rust Proof Exterior Handles the Heat and Weathers the Elements.
  • Improved Resistance to Rodent Intrusion
  • Online part number EC-462029 is the direct replacement for part number 460737
Purchase Options
  • Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Natural Gas - 250000 BTU - EC-462026
    MasterTemp Low Nox - Natural Gas - 250k BTU - EC-462026

  • Pentair MasterTemp Low NOx Pool Heater - Electronic Ignition - Natural Gas - 400000 BTU | EC-462028
    MasterTemp Low Nox - Natural Gas - 400k BTU - EC-462028

  • Pentair Sta-Rite 4x6 Metal Flue Collar for Indoor Vertical Venting - Negative Pressure for Distance Less Than 8' | 77707-0076
    Indoor Vertical Venting - Negative Pressure 4x6 Metal Flue Collar for Distances Less Than 8' | 77707-0076

  • Pentair Sta-Rite 4x8 Metal Flue Collar for Indoor Vertical Venting - Negative Pressure for Distances Over 8' | 77707-0077
    Indoor Vertical Venting - Negative Pressure 4x8 Metal Flue Collar for Distances Over 8' | 77707-0077

  • Pentair 4" Stainless Steel Appliance Adapter for Horizontal or Vertical Positive Pressure by Heatfab | 77707-0086
    4" Appliance Adapter Horizontal or Vertical Venting, Positive Pressure by Heatfab | 77707-0086

  • Pentair 4" Stainless Steel Appliance Adapter for Horizontal or Vertical Positive Pressure Venting by Z-Flex | 77707-0087
    4" Appliance Adapter for Horizontal or Vertical Positive Pressure Venting by Z-Flex | 77707-0087

Ultra-High Performance in a Compact, Quiet & Eco-Friendly Design
MasterTemp Heaters offer all the efficiency, convenience and reliability features you want in a pool heater, plus a lot more. As easy to use as your home heating system, plus, user-friendly indicator lights make system operation and monitoring a snap. The compact design and super-quiet operation won't intrude on your poolside leisure time. 
MasterTemps easy-to-read controls make system operation and monitoring simple. Pool and spa temperatures can be pre-set and controlled with the push of a button. A digital display indicates the water temperature, and five LED lights give you system status and let you know if the heater needs service.
New Improved Rodent Resistance for the MasterTemp High Performance Heater
The engineers made improvements to reduce gaps and eliminate access points, including advancements to the heater base, all exterior side panels and louvers, the gas valve and water manifold openings, the exhaust opening and the exhaust cover. These subtle, but important, design changes add up to a better heater, from every angle.
In addition to the new rodent resistant improvements, the features and benefits of a MasterTemp High Performance Heater include:
  • Enhanced LCD display and diagnostics include easy to display and front-facing error messages and icons
  • Best-in-class energy efficiency
  • Eco-friendly certified for low, NOx emission and outperforms industry standard
No matter what you're seeking in your swimming pool heater, MasterTemp measures up. Compare this list of features to any other and you'll see why MasterTemp is setting a new standard for total value:
  • Very compact design for such a high performance heater allows for smaller overall equipment pads that won't intrude on your poolscape.
  • Easy to install or retrofit in even the tightest spaces.
  • A fully pre-mixed system with a highly efficient air and gas mixture lets MasterTemp heat up fast. No long waits before enjoying your pool or spa.
  • Compare energy efficiency ratings and you'll find MasterTemp at the top of the list. Comfort and economy can go together.
  • With a hot surface ignition (no pilot light) and pushbutton, digital controls, MasterTemp is as easy to operate as your home heating system. Plus, user-friendly indicator lights make system operation and monitoring a snap.
  • The easy-to-view, rotating digital display places controls front and center, no matter how MasterTemp is positioned on your equipment pad.
  • MasterTemp is engineered for super-quiet operation and won't intrude on your poolside leisure time.
  • A tough, composite exterior handles the heat and weathers the elements.
  • Safe operation is assured through a series of features, including; a water pressure switch that senses the pump is running to prevent overheating; high limit switches assure the heater turns off if water temperature exceeds factory set limits; manual gas shut-off when service is required; stack flue sensor also guards against overheating.
  • Approved for installation on combustible surfaces.
Why MasterTemp Heaters are the "Greenest" Choice
An Eco Select Brand: MasterTemp Heaters offer best-in-class energy efficiency. Plus, they are certified for low NOx emissions, making them eco-friendly favorites. In fact, MasterTemp outperforms current industry standards for air pollution exhaust.
The Eco Select Brand identifies Pentair's "greenest" and most efficient equipment choices. These products save energy, conserve water, eliminate noise or otherwise contribute to a more environmentally responsible equipment system.
As the global leader in pool and spa equipment manufacturing, Pentair strives to provide greener choices.
Brand Pentair
Sub Brand MasterTemp
Item Low NOx Pool and Spa Heater
Type High Performance
Gas Type Liquid Propane
Control Type Digital
BTUH Input 400,000
Cabinet Width 23.02"
Cabinet Depth 32.61"
Cabinet Height 28.15"
Gas Connection 3/4"
Water Connection 2"
Voltage Rating 120/240 VAC
Frequency Rating 60 Hz
Phase 1-Phase
Flow Rate 120 gpm

Brand: Pentair
BTU Rating
Gas Type
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 11 questions Browse 11 questions and 22 answers
Will this heater work with iaqualink?
Matthew D on Mar 14, 2017
A shopper on Dec 13, 2015
BEST ANSWER: This unit may be installed indoors but you will need to buy the indoor venting kit as a add on to the purchase. Additionally you will need to verify that the location of the install can accommodate the vent piping that will need to be installed as well as meet your local codes to take the exhaust away from any dwelling where people live.
Where is the gas inlet located?
A shopper on May 13, 2016
BEST ANSWER: Take the back panel off and you will see it. Iinstallatiion of this unit was fairly simple.
What's the life of a heater mine only lasted 5 yearslopking to replace ?
A shopper on Mar 6, 2017
BEST ANSWER: My first one lasted about 10 years but I had to replace the motherboard after the 6th year. I am going on the 2nd year for my new heater.
is this 120 v or 220v and is is plug in or hard wired ?
A shopper on Apr 25, 2017
BEST ANSWER: Can run 110v or 220v you just have to change a wire in the panel. It tells you how to run 110v or 220 v in the manual or you can call their tech support great people!! It's hard wired.
how big of a pool will this heat and how long will it take ?
A shopper on Dec 11, 2016
BEST ANSWER: Have installed 3 of these heaters in the Longmont area and they perform very well the largest pool we installed one on was fifteen thousand gallons and it performed extremely well as for how fast will it heat we installed one on a friends pool in Lyons inside his barn for his wife and grandchildren when we first fired it up was right at thanksgiving day the water was at 42 and in about 7 hour's it was right at 80 and on my own pool it will take the water from 68 to 84 in less than 2 hours I would highly recommend this heater to everyone and as I said I put one on my best friends pool and on my own and we are all very satisfied and for the size and the cost you can't beat it
can you get a remote for this heater?
A shopper on Sep 1, 2019
BEST ANSWER: There are lots of automation systems available on the market that would work with this pool heater. The SunTouch or EasyTouch would be your least expensive options. There are other ways of doing it but that wouldn't be supported by the manufacture.

Which model would work best for a 35,000 gal tank?
A shopper on Dec 13, 2016
BEST ANSWER: For a 35,000 gallon pool I would recommend a 400k BTU heater.
What is the % of efficiency?
A shopper on Jan 25, 2021
how many gallons with the highest BTU option heat effectively?
matt r on Jun 4, 2019
Does the pool heater come with all necessary parts to hook up and run?
Pat W on May 10, 2017
4.9 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Good price and fast shipping
Pool Supply Unlimited had a very reasonable price for the Pentair MasterTemp Heater and shipped it out promptly. Thank you.
July 13, 2020
9 months ago
Rated 5 out of 5
Seems perfect, maybe third times a charm?
My last two heaters, which lasted 10 years each, got eaten out by mice and needed constant maintenance. This one cost less, is less than half the size, works quickly and reliably without a pilot, and seems mouseproof. So fingers crossed! They delivered it very quickly and I had it professionally installed.
July 31, 2020
9 months ago
Rated 5 out of 5
So far so good and the heater seems to work very well.
June 2, 2018
over 2 years ago
Rated 5 out of 5
Loved how fast and easy it was to hookup! So nice and quiet it's a dream. Thank you for saving the day for our pool season!!
July 10, 2017
over 3 years ago
Rated 5 out of 5
nice easy install and quick hratig using 100 pound tank will need to go to bigger tank cause i have dryer range and water heayer on system
December 16, 2018
over 2 years ago
Rated 5 out of 5
Pentair MasterTemp Low NOx 400,000BTU Pool Heater
Ordered this heater from Pool Supply Unlimited online and received it within 5 days! Installation was extremely easy if you know anything about the workings of a pool filter and heater system layout. Only 3 wires, gas hookup was a breeze. Total time including removal of the old heater was 1 hour, 15 minutes. This heater is primarily used to heat up the spa which is attached to the pool. I will bring the water temp up to about 102degrees in about 15 minutes. Great unit and great service by Pool Supply Unlimited!
November 4, 2019
1 year ago
Rated 5 out of 5
Came in great condition and the shipping company was easy to communicate with. Definitely recommend over working with other vendors.
April 5, 2020
1 year ago
Rated 5 out of 5
Replacement unit
Setup was straight forward and was up and running in less than a day.��It was a good purchase at a amazing price from a great company!<br>
March 9, 2017
Rated 4 out of 5
I feel I have made a good perchase!!
Shipped very fast. Installed very easy. Seems to be made very well. Puts out tremindous heat very quickly. Makes an intimidating sound, full of power. Uses less gas and heats quicker than my last 250,000 but heater. Makes using your hot tube more fun than costly. It's also much smaller and looks better than my old unit. You will be very pleased.
August 22, 2016
over 5 years ago
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Register your Pentair product online at www.pentair.com.

  • LIMITED WARRANTY: Pentair warrants its products to be free from defects in material and/or workmanship for a period of sixty (60) days (parts only) from the original date of purchase and/or installation. Customer agrees to prepay all shipping charges to Pentair.
  • EXTENDED WARRANTY: To receive a product extended warranty (longer than 60 days from the original date of installation), customer must:
  1. Register the product;
  2. Provide a copy of the sales receipt; and
  3. Provide a copy of the installation invoice, provided by the qualified installer, within 60 days of installation (if required). Certain products do not require qualified installation but still require product registration and copy of the sales receipt to receive the extended warranty.
  • TRADEGRADE WARRANTY: TradeGrade products must be purchased from a retail store (brick and mortar), pool builder or pool service company. If purchased online (via internet) the product will only receive a sixty (60) day limited warranty. View the list of TradeGrade products here.
  • ECOMMERCE (EC) WARRANTY: Products purchased from an Authorized Pentair Online Reseller receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty. To receive an eCommerce warranty, customer must:
  1. Register the product, and
  2. Provide a copy of the sales receipt
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 04/05/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

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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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