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Sta-Rite Max-E-Therm Heater
The Max-E-Therm heater was designed to outperform all other pool and spa heaters on the market today. It is the only heater to feature a rustproof exterior, which means it not only lasts longer but is far more attractive than the large metal units. The easy to read digital display is weatherproof and rotates to six different positions, making it accessible with any plumbing configuration. To help read the display on bright days, a pivoting plastic visor filters the sun light. A full complement of internal and external diagnostic lights are included to make troubleshooting a breeze and define whether the problem is heater or system related.
Sta-Rite Max-E-Therm Heater
The Max-E-Therm is certified for low NOx emissions
Max-E-Therm provides easy installation with PVC union connections, while downdrafts are eliminated by the fan-assisted combustion chamber. All units are stocked as natural gas heaters. Please request conversion kit if propane is required and purchase vent pipe kits separately. All units are 30½ inches tall, with a width of 25 inches which increases to 32 inches with the manifold attached.
Description Model # BTU Input Add To Cart
Max-E-Therm Heater SR200NA 200,000 $1499.99*
Max-E-Therm Heater SR333NA 333,000 $1699.99*
Max-E-Therm Heater SR400NA 400,000 $1899.99*
Accessories
Propane Conversion Kit 77707-1361 For SR200NA $59.99
Propane Conversion Kit 77707-1341 For SR400NA $59.99
*Note: Some heaters may incur additional shipping fees due to weight. Please feel free to place your order and we will advise you of any fees prior to processing your order or email us for a quote.

Max-E-Therm Documents
Max-E-Therm Brochure PDF Data Sheet/Brochure
Manual/User Guide
Green Brochure

Sure, a beautiful pool looks inviting, but its cold water can keep you high and dry. Which is why it pays to have a Max-E-Therm® heater. After all, when the water’s just right, you maximize the enjoyment of your pool experience. The fast-heating Max-E-Therm makes your pool irresistible on cool nights. It also allows you to extend your pool season.

Unlike other heaters, Max-E-Therm offers you the latest advances from Sta-Rite®: a rustproof exterior, smart electronics and increased energy efficiency.

Whether you’re looking for quiet relaxation or wild fun, you’ll always enjoy your pool in the warm comfort of Max-E-Therm.

  • Lightweight - Lightest heater in its class
  • Best in class energy efficiency
  • Compact Design - Ideal for retro-fit installations
  • Easy to Switch - Change gas sources with installation of separate orifice
  • Environmentally Friendly - All units are low NOx
  • Rustproof Housing - Sleek, matte black enclosure is made of Dura-Glas - an exclusive Sta-Rite material that handles the heat and weathers the elements
  • Lower Operating Costs - 84% efficiency rating - rated first in its class for highest energy efficiency
  • Custom or Retrofit - Direct-connects to Sta-Rite System:3® Mod Media filter or easily fits other systems

    If you want that warm-all-over feeling, choose the Sta-Rite Max-E-Therm heater. It’s a better choice for a host of reasons.

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    This heater is hot!

    Pool professionals will tell you the Max-E-Therm® heater is an industry favorite for heating pools and spas. Its sleek, contemporary styling offers pool owners an easy choice over the traditional-style heaters—those plain-looking, clunky metal boxes just waiting for the rust to set in.

    The perfect mix
    Is the toe test telling you the water could be a bit warmer? No problem. The Max-E-Therm can quickly warm your pool or spa. A perfectly balanced mixture of fuel and air is ignited in the combustion chamber, which produces the optimal temperature for faster heating.

    Rated first in its class!
    If operating cost was holding you back on a heater, you can proceed with confidence—Max-E-Therm has a best-in-class efficiency rating