For indoor or outdoor installations on pools and spas. Features include an LCD temperature readout with dual thermostat controls, temperature safety lockout, and six-position control panel. PMG burner technology requires no outdoor draft hood. Proven Dura-Glas™ Resin provides rust-proof construction. Heavy-duty (HD) unit with cupro-nickel exchanger for improved performance in more challenging applications, like low pH, high flow, or heavy use.

• Now, with smart connectivity and energy-saving automation, it’s easier than ever to get the pool warm and ready whenever needed.
• New automation functionality and ignition control module with flame strength sensor for always optimized performance.
• Max-E-Therm Heater is certified for low NOx emission.
• The multi-position top panel allows the digital display to be re-positioned for convenient operation.
• A tough, rustproof exterior handles the heat and weathers the elements.
• Certified for outdoor and indoor installations.
• Optional Smart Heater Bypass valve control diverts water flow when the heater isn’t needed to help save up to 35% in yearly operational costs.*

Specifications:

• Brand: Pentair
• Application: Indoor, Outdoor, Pool, Spa, up to 50,000 gallons*
• Shipping Dimensions: 27.75 x 34.25 x 32 inch
• Commercial, Residential, or Professional: Residential
• Weight: 127 pounds
• Frequency Rating (Hz): 60
• Fuel Type: Natural Gas
• Phase: Single
• Weight: 138 pounds
• Standards Approvals: CSA Certified
• Voltage: 120V, 240V
• BTU Input: 400,000 British thermal unit
• Cabinet Depth: 31.69 inch
• Cabinet Height: 30.03 inch
• Cabinet Width: 25.15 inch
• Control Type: Digital
• Flow Rate Max: 120 gal/min
• Flow Rate Min: 40 gal/min
• Green or Energy-Efficient Product: True
• Product Depth: 30 inch
• Product Height: 26 inch
• Product Width: 26 inch
• Tubing Material: Cupro Nickel
• UPC Code: 022315306172
• Model: SR400HD 400 HD - Natural Gas - 400K BTU - Cupro-Nickel

Optional Accessories:

• 475002 - 3'' PVC Direct Air Intake Duct Kit
• 462048 - Valve Bypass Assembly Connector

PLEASE NOTE: All HD and ASME HD Heater models include the Cupro-Nickel Heat Exchanger.

Support Documents:

• Max-E-Therm Heaters for Pools and Spas
• Max-E-Therm Users Guide
• StaRite Heater Connector Tube Installation Instructions
• Max-E-Therm Heater Manifold Replacement Instructions Manual
• Max-E-Therm Heater Groundwire Kit Installation Instructions
• Max-E-Therm Direct Air Intake Duct Kit Installation Instructions
• Heater Checklist
• Max-E-Therm Heater Submittal Data Sheet

*Please Note: The BTU rating is the minimum heating requirement for the recommended gallons shown. This is under perfect conditions with no temperature loss. Always size up if you plan to use the heater in cool weather or without a cover.