Pentair Max-E-Therm® SR333 HD Natural Gas Pool & Spa Heater 333K BTU Stay ready to swim with the smart, high-performance Max-E-Therm heater. Now with advanced connectivity and energy-saving features: Smart control via Pentair IntelliCenter® – manage from anywhere (sold separately) Real-time alerts to your device for performance updates Optimized ignition with flame strength monitoring Easy-to-use full-text digital display Optional Smart Bypass Valve 462048 saves up to 35% on energy costs Reliable, efficient, and now smarter than ever. Support Documents: Brochure Install Guide Tech Info Specifications: Brand: Pentair Application: Indoor, Outdoor, Pool, Spa Shipping Dimensions: 27.75 x 34.25 x 32 inch BTU Input: 333000 British thermal unit Cabinet Depth: 31.69 inch Cabinet Height: 30.03 inch Cabinet Width: 25.15 inch Commercial, Residential, or Professional: Residential Control Type: Digital Weight: 123 pounds Flow Rate Max: 120 gal/min Flow Rate Min: 33 gal/min Frequency Rating (Hz): 60 Fuel Type: Natural Gas Green or Energy Efficient Product: True Phase: Single Standards Approvals: CSA Certified Tubing Material: Cupro Nickel Voltage: 120V, 240V UPC Code: 022315306165 Warranty: 2-year warranty with professional installation