Pentair Mastertemp Asme-Certified 400K Btu Natural Gas Pool Heater | Model 461021

Description

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Advanced heating performance for demanding applications.

Designed for commercial pool and spa installations, this heater combines high BTU output, efficient combustion, and quiet operation to deliver strong, reliable heat with refined day-to-day performance.

400,000 BTUHeating capacity84%Combustion efficiency1 quietLow-noise operation400,000 BTU Heating CapacityHigh-Efficiency CombustionQuiet OperationCommercial Heating Powerful output
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Advanced Heating Performance

400,000 BTU Heating Capacity

Delivers powerful heating output suitable for commercial pool and spa installations.

High-Efficiency Combustion

Fully premixed air-and-gas combustion system provides faster heating while maintaining efficiency levels up to 84%.

Quiet Operation

Engineered for low operational noise while maintaining strong heating performance.

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Intelligent Control System

Digital Display Interface

Full text digital display provides an intuitive menu for heater operation, diagnostics, and system monitoring.

Flame Strength Monitoring

Integrated ignition control module monitors flame strength to ensure optimal heater performance.

Automated Alerts

System alerts notify users when the heater requires maintenance or service attention.

Installation Flexibility

Indoor Installation Approved

Certified for indoor installations when used with a Direct Air Intake Duct Kit.

Heat Exchanger Options

Available with copper or heavy-duty cupronickel heat exchanger models to match application requirements.

 

MasterTemp High Performance ASME Certified Pool Heater

The MasterTemp High Performance ASME Certified Heater delivers ultra-high heating performance in a compact, quiet, and energy-efficient design built for commercial pool and spa applications. Designed to meet ASME certification requirements, this 400,000 BTU heater combines durable construction with advanced heating technology to provide fast heat-up times and reliable operation.

Its high-efficiency combustion system and optimized air-to-gas mixture allow for rapid water heating while maintaining energy efficiency of up to 84%. The compact footprint allows installation in tight equipment areas while maintaining strong heating capacity for larger commercial pools.

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