Max E Therm 400 #SR400LP Propane

Lightweight, Rustproof, Smart & Energy Efficient! Max-E-Therm is the lightest heater in its category, with best-in-class energy efficiency. It features an LED temperature readout with dual thermostat controls, temperature safety lockout and a six-position control panel for easy operation.

Get that warm-all-over feeling The fast-heating Max-E-Therm heater makes your pool irresistible on cool nights. It also allows you to extend your pool season. The Max-E-Therm heater offers you the latest advances from Sta-Rite: a rustproof exterior, smart electronics and increased energy efficiency. The Eco Select brand identifies our greenest and most efficient equipment choices. Max-E-Therm heaters offer best-in-class energy efficiency. Plus, they are certified for low NOx emissions, making them eco-friendly favorites.

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 heater 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 heaters have a best-in-class efficiency rating.


  • Lightweight—lightest heater in its class.
  • 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
  • ower operating costs—84% efficiency rating, rated first in its class for highest energy efficiency
  • Custom or retrofit—directly connects to Sta-Rite System:3 Mod Media Filter or easily fits other systems
  • Certified for outdoor and indoor installations
  • Standard Copper Heat Exchanger 84% efficient. Heavy-Duty (HD) Cupro-Nickel Heat Exchanger 82% efficient.
  • High efficiency rating makes the Max-E-Therm heater extremely economical to operate.
  • Specially designed fueling and ignition process permits faster warming of your pool and spa.
  • Easy-to-read, conveniently positioned control panel is simple to program.
  • Dura-Glas Housing will not corrode and stands tough against harsh weather.
  • 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.

Our Process


Contact us so we can learn more about your pool needs and expectations.


We'll help determine the best possible solution for you.


Time to schedule your pool service. You can sit back and breathe easy.

Peace of Mind

We finish up and ensure everything is taken care of.

We just had some warranty work done by these guys. I can see why they were the choice to perform our work. They were super easy to work with, followed up on everything and returned calls promptly. When the work was finished it was perfect and they left no sign that they had been there.

- Greg H.

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Our friendly and knowledgeable staff of customer service representatives are always happy to assist you.