The Pentair 400,000 BTU 84% Thermal Efficiency Propane Pool and Spa Heater Max-E-Therm Series (SR400HD) is a high-performance heating solution designed to provide reliable and efficient temperature control for residential pool and spa applications. Part of the Pentair Max-E-Therm Series, this propane heater delivers powerful heating output, durable construction, and advanced technology to help extend the swimming season and maintain comfortable water temperatures.

The Pentair SR400HD provides 400,000 BTU heating capacity with 84% thermal efficiency, making it ideal for larger pools and spa systems that require dependable heat performance. Designed with corrosion-resistant materials and user-friendly controls, this heater provides consistent operation while supporting long-term outdoor durability.

Key Features

• 400,000 BTU Heating Capacity – Provides powerful heating performance for large pool and spa applications
• 84% Thermal Efficiency – Designed for effective heat transfer and efficient operation
• Propane Fuel Operation – Delivers fast and reliable pool and spa heating performance
• Max-E-Therm Series Design – Built for dependable residential pool and spa heating
• Pool & Spa Compatibility – Designed to support both swimming pool and spa temperature control
• Durable Outdoor Construction – Built to withstand demanding poolside environments
• Advanced Digital Controls – Provides convenient temperature adjustment and monitoring
• Corrosion-Resistant Components – Helps improve durability and service life
• Automation Compatible – Designed to integrate with compatible Pentair pool automation systems

Product Specifications

• Brand: Pentair
• Series: Max-E-Therm Series
• Model: SR400HD
• Product Type: Propane Pool and Spa Heater
• Heating Capacity: 400,000 BTU
• Thermal Efficiency: 84%
• Fuel Type: Propane
• Application: Residential Swimming Pools and Spas
• Control Type: Digital Control Interface
• Installation Type: Outdoor Pool Equipment

Benefits

• Provides powerful heating for large pools and spas
• Extends the swimming season by maintaining comfortable water temperatures
• Delivers consistent heat output with propane operation
• Supports efficient pool and spa temperature management
• Durable design helps withstand outdoor conditions
• Reduces temperature fluctuations with reliable heating performance
• Compatible with modern pool automation systems

Compatibility & Installation

The Pentair Max-E-Therm SR400HD Pool and Spa Heater is designed for:

• Residential swimming pools
• Spa heating applications
• Pool and spa combination systems
• Pool heating upgrades
• New pool construction projects
• Automated pool equipment systems

Installation considerations:

• Verify propane supply requirements before installation
• Confirm proper ventilation and exhaust clearances
• Ensure gas, electrical, and plumbing connections meet local codes
• Maintain proper water flow through the heater
• Follow manufacturer installation guidelines
• Professional pool equipment installation is recommended

Frequently Asked Questions

What is the heating capacity of the Pentair SR400HD?
The heater provides 400,000 BTU of heating output.

What fuel type does this pool heater use?
The Pentair SR400HD operates using propane fuel.

What is the efficiency rating of this heater?
This model features an 84% thermal efficiency rating.

Can this heater be used for both pools and spas?
Yes. The SR400HD is designed for pool and spa heating applications.

What series is the Pentair SR400HD part of?
It is part of the Pentair Max-E-Therm Series.