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Gas Pool Heaters

Pentair MiniMax

Model: NT Series

GAS Pool Heaters - Discover quality alternative heating options
to be sure that Gas Heating is the right choice for your pool.

Were you aware propane or natural gas has the highest operating
cost, and is the least efficient / cost effective way to heat a pool?

If you require rapid heat up, constant temperature regardless of
outside temperature, or you are heating a spa or hot tub, then the
gas heater below may be right for you.

ALERT » View other higher efficiency options
. Side-by-side major heating systems comparison guide reviews
. the details on Gas Heaters, and how they compare to the two
. other major heating methods - Heat Pumps and Solar

HELP » Contact Customer Support
. Toll-Free help line offering system selection support 


Pentair MiniMax NT Gas Pool Heater

MiniMax NT - manufactured
by Pentair, now offers the most
advanced heater available!!!

The Energy SuperMarket's
second most popular brand,
the MiniMax NT is designed
to highly resist all corrosion, 
and earns the 5 star rating in
our Consumer Value guide!

The Energy SuperMarket offers
the lowest on-line factory direct
pricing available! Guaranteed.

Pentair - A global technology
and development company -
Pentair is now the premier
manufacturer of swimming pool
and spa systems, and a world
leader in water technology.

Available in both Natural Gas
or Liquid Propane,
MiniMax NT gas heaters will effortlessly raise your pool's temperature well into the 80-90 degree range, and/or your spa to 104 degrees, generate a rapid heat-up, plus ensure a constant temperature regardless of weather conditions.

In addition to warming the water, the swimming season can be extended in cooler climates by as much as 50 percent.

MiniMax NT units require little to no maintenance, and typically last 5 to 10 years, or more.

MiniMax NT Series Highlights:

. Unique Features - The MiniMax NT is the most technologically advanced heater ever developed by Pentair!

MiniMax features the energy-saving "Hot Surface" ignition, fast heat-up, and exceptional efficiency for lower operating costs. With its space-saving, low profile design and rounded corners is visually attractive and blends easily into any backyard or pool/spa area décor.

The MiniMax NT from Pentair makes extending your pool season, adding to your comfort, and maximizing your backyard enjoyment surprisingly easy and affordable. They heat up fast. They are economical to run. And they're built to last for many years.

Plus the MiniMax's thermal efficiency exceeds 82% -
for minimum operating costs!!! 

The MiniMax NT is available in several models to meet any pool and spa heating requirements. Plus MiniMax is CSA listed and approved for sale in Canada.

Computer Controls - Fully electronic auto-diagnostic system provides "intelligent" controls that sense water temperature and pressure for optimum flow.

Dual thermostats offer precise temperature control to maintain desired water temperatures in pool/spa combinations without overheating or wasting energy.

LED lights on control panel provide at-a-glance monitoring of major heater functions.

. Burner System - Natural Gas [NAT] or Propane [LPG]; features Pentair's long-life corrosion-resistant composite header system integrated with premium copper high-fin heat exchanger for maximum thermal efficiency, plus a fan-assisted exhaust for optimum ventilation and safety.

. Ignition System - The MiniMax NT comes standard with the energy-saving "Hot Surface" [HSI] electronic ignition system for optimum performance.

All HSI heaters are designed with a direct ignition device which eliminates the need for a standing pilot flame.

. Flow Control - Patented flow valve with long-life power element minimizes condensation, erosion, and scaling.

. Combustion Chamber - High-tech ceramic fiber tile insulation located inside the clean burn silicone-sealed combustion chamber ensures quick water heating.

. Cabinet - Maintenance free, metal construction, provided by
a weatherproof anodized aluminum exterior, combined with a durable corrosion-free composite top.

. Installation - The MiniMax NT comes pre-wired for use with all major brand pool/spa automatic controls, with easy service access to all controls behind hinged access doors.

Easy-to-install CPVC bulkhead connections and reversible headers combined with a compact profile and a small unit footprint. Designed with universal connections that can be directly connected to schedule 40 PVC pipe, MiniMax is compatible with most pre-existing or new installations.



. Gas Heater Installation - Upon delivery of unit,
installation of a heater can be performed by homeowner, but The Energy SuperMarket strongly recommends the installation of any new or replacement gas heater be done by trained personnel, a licensed and insured contractor, or by a pool/spa professional.

. Gas Connections - Actual  hook-up of the gas connections and the turn-on of the gas itself are highly recommend, and in most states legally required, to be performed by a licensed and insured plumber, or a gas utility company employee.

. Critical WarningDo not attempt to connect gas lines or turn-on gas yourself! Serious personal injury, damage to the unit and/or home, fire, or explosion could result !!!

. Indoor installation requires Indoor Draft Hood.
. Use in high wind areas requires a High Wind Stack.
. [Both purchased separately]

Function: Warms pool/spa to 80-90° plus extends season
Benefits: Maximizes your pool/spa investment!

Product Applications:

. Residential and light-duty commercial installations
. Do-it-yourself project; average three hour installation
. Change-out feasible by handy-person / hand tools
. Gas hook-up performed by a licensed professional
Easy to read step-by-step installation manual
. Excellent for pools/spas at residential, condo, resort,
. hotel, motel, and vacation home locations
. Supplementing a gas heater with a solar pool cover
. greatly enhances its performance, plus reduces
. energy costs up to 70 percent - thereby saving
. hundreds of dollars per year in pool heating costs!

Product Features:
. System utilizes existing pool pump to circulate water
. Swimming season extended up to 50% in cool climates
. Effective systems perform year round in warm climates
. Heats spa to toasty 104 degrees - maximum legal limit

. 5-Year Limited Factory Warranty - on cabinet and burner
2-Year Limited Factory Warranty - on all unit parts

Proper unit selection supported by customer service agent
. Installation supported by engineering tech assistance
. Toll-Free help line and/or online e-mail tech support
. Worldwide shipping available - delivered to your doorstep
. Lowest factory direct pricing available anywhere! 
. Guaranteed.

Product Specifications:
. NT Series - by Pentair, largest manufacturer in world
. Backed up with a strong manufacturer's warranty
. Units designed to exceed commercial grade specifications
High unit life expectancy; typically lasts 5-10 years

NT Series Technical Specifications:
Model NT250: 250,000 BTU, natural gas or liquid propane
Model NT400: 400,000 BTU, natural gas or liquid propane  
. Required flow rate: 40-120 GPM

Product Manufacturer: Pentair Pool Products, Inc.

IMPORTANT NOTE: The average skilled handy person can easily manage a basic unit change-out or new installation. 
For installations which require new gas and/or electrical service, hiring a contractor is recommended.

NOTICE:  Southern CA and TX law requires Low Nox units. 
Units delivered and installed in these areas must select Low Nox. 
Low Nox is only available in 250, 350, and 400 BTU units.

NOTICE:  Millivolt Pilot Light units are not available in all sizes and do not include digital controls.

PDF Download

Operation and Installation Manual

Gas Heaters for
Inground Pools

RayPak R Series
RayPak LowNOx
Pentair Minimax
Hayward H-Series
Jandy Laars Lite2
Jandy Laars Hi-E2
Jandy Laars LX/LT

Gas Heaters for AboveGrnd Pools

Pentair Minimax
Hayward H-Series

Other Products

Solar Pool Heaters
Heat Pump Heater

Compare Options

Compare solar pool heaters, heat pumps and gas heaters in this side-by-side comparison chart.
Comparison Chart

Learn How To:

Extend your swimming season

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