Pentair Max-E-Therm 400 Natural Gas Pool & Spa Heater 400K BTU SR400NA

Pentair Max-E-Therm® 400 Natural Gas Pool & Spa Heater 400K BTU SR400NA - Pool Heaters - img-1

Pentair Max-E-Therm 400 Natural Gas Pool & Spa Heater 400K BTU SR400NA

*Local pickup only. Available in Arizona and Nevada.

Pentair Max-E-Therm® 400 Natural Gas Pool & Spa Heater 400K BTU SR400NA

Designed for both indoor and outdoor installations on pools and spas, the Pentair Max-E-Therm® 400 offers a range of features for efficient and eco-friendly heating. With proven Dura-Glas rust-proof construction and heavy-duty design, this heater stands up to the harshest of applications.

An Eco Select Choice:

Max-E-Therm high-performance heaters offer best-in-class energy efficiency and are certified for low NOx emissions, making them eco-friendly favorites.

Max-E-Therm Features:

  • Lightweight: Lightest heater in its class.
  • Compact Design: Ideal for retro-fit installation.
  • Environmentally Friendly: All units are low NOx.
  • Rustproof Housing: Sleek, matte black enclosure made of Dura-Glas.
  • Lower Operating Costs: 84% efficiency rating.
  • Custom or Retrofit: Easily fits other systems.
  • Advanced Technology: Weather-proof frame, effortless controls, and environmentally conscience exhaust.
  • LED Temperature Readout: With dual thermostat controls and 6-position control panel.
  • High Efficiency: Economical to operate.
  • Fast Heat-Ups: Enjoy soothing swims without the wait.
  • Top-Mounted Control Panel: Large format digital display.
  • Self Diagnostics: Indicator lights for easy troubleshooting.
  • Tough Exterior: Made of exclusive Sta-Rite thermoplastic resin.

Indulge in the warmth of your pool or spa with the Pentair Max-E-Therm® 400. Its advanced features and eco-friendly design make it a top choice for pool heating. Experience the best in pool heating with Sta-Rite Max-E-Therm Low NOx heaters.

Max-E-Therm Heaters for Pools and Spas - English
Max-E-Therm Pool and Spa Heater Users Guide - English
Max-E-Therm Pool and Spa Heater Users Guide - Spanish
StaRite Heater Connector Tube Installation Instructions - English
Max-E-Therm Heater Manifold Replacement Instructions Manual - English
MasterTemp and Max-E-Therm Heater Groundwire Kit Installation Instructions - English
MasterTemp and Max-E-Therm Pool Heaters Combustion Chamber Replacement Parts ADDENDUM - English
MasterTemp and Max-E-Therm Heater Direct air Intake Duct with 3 inch PVC Pipe Kit Installation Instructions - English
Sta-Rite Max-E-Therm Heater Submittal Data Sheet

SKU: SR400NA

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

  • 5
    1740 (91.5%)
  • 4
    133 (7%)
  • 3
    20 (1.1%)
  • 2
    5 (0.3%)
  • 1
    4 (0.2%)
98% of customers rate this company 4- or 5-stars
Highest to Lowest
  • Favorite Reviews
  • Highest to Lowest
  • Newest to Oldest
All Ratings
  • All Ratings
  • 5 ★ Reviews
  • 4 ★ Reviews
  • 3 ★ Reviews
  • 2 ★ Reviews
  • 1 ★ Reviews
Rajeev S. Verified Customer
04-01-25 - Arizona, US

Zack was very helpful.

Recommend this Company
5 / 5
Would Buy Again
5 / 5
GLEN M. Verified Customer
04-01-25 - Nevada, US

Referral

Recommend this Company
5 / 5
Would Buy Again
5 / 5
Joshua O. Verified Customer
03-31-25 - Arizona, US

Always great customer service

Recommend this Company
5 / 5
Would Buy Again
5 / 5
Brad M. Verified Customer
03-31-25 - Texas, US

Quick and easy check out

Recommend this Company
5 / 5
Would Buy Again
5 / 5
You may also like