Product Overview

The Pentair MasterTemp 400 High Performance Pool & Spa Heater | EC-462029 is a powerful propane gas heater designed for fast, efficient heating in residential pool and spa systems. With a 400,000 BTU heating capacity, this heater is ideal for larger pools, pool/spa combinations, and customers who want quick heat-up times.

The MasterTemp series is known for its compact footprint, quiet operation, easy-to-use digital controls, and efficient premix combustion technology. This propane model is designed for properties using LP gas and includes Low NOx performance, electronic ignition, and a durable rustproof composite exterior cabinet.

Pentair’s MasterTemp platform is built for service-friendly installation, with a rotating digital display that can be positioned for easier access on different equipment pad layouts. Public product listings identify EC-462029 as the propane 400K BTU MasterTemp model, commonly cross-referenced with 460737, and UPC 788379887353.

Ideal For

• Residential inground pools
• Pool and spa combination systems
• Larger pools requiring fast heat-up
• Propane gas pool heating systems
• Homes without natural gas service
• Replacing older propane pool heaters
• Customers wanting digital heater controls
• Low NOx heater replacement applications
• Compact equipment pad installations
• Professional pool heater installations

Key Features

• 400,000 BTU heating capacity — delivers powerful heating performance for pools and spas.
• Propane gas operation — ideal for properties using LP gas service.
• Low NOx certified design — engineered for cleaner combustion and reduced emissions.
• Premix combustion technology — supports fast, efficient warm-ups.
• Electronic ignition — reliable startup without a standing pilot light.
• Digital control display — easy-to-use interface for temperature control and system monitoring.
• Rotating control panel — controls can rotate to multiple positions for easier installation and service access.
• Compact cabinet design — commonly referenced around 21" L x 21" W x 28" H, helping fit smaller equipment pads.
• Rustproof composite exterior — built to handle outdoor pool equipment environments.
• Quiet operation — designed for a more comfortable poolside experience.
• Automation compatible — works with compatible pool and spa automation systems when properly configured.
• Approved for indoor or outdoor installation where code-compliant — installation must follow all venting and local code requirements.

Benefits

The Pentair EC-462029 MasterTemp 400 propane heater helps extend the swim season and makes spas more enjoyable by delivering rapid water heating. Its 400K BTU output provides strong heat recovery, making it a popular choice for pool/spa combinations and larger residential pool systems.

The digital controls and indicator lights make operation simple, while the rotating display helps installers position controls where they are easiest to access. The compact cabinet is useful for equipment pads with limited space, and the rustproof exterior helps support long-term outdoor performance.

For pool professionals, the MasterTemp platform provides a dependable, service-friendly propane heater option with proven Pentair performance and strong residential heating capacity.

Specifications

Included Components

• 1 × Pentair MasterTemp 400 propane gas pool and spa heater
• Integrated digital control display
• Electronic ignition system
• Premix combustion burner system
• Internal heat exchanger and header assembly
• Manufacturer-supplied installation documentation

Propane gas line, gas shutoff valve, regulator if required, electrical wiring, bonding materials, venting components, plumbing valves, unions, check valves, pressure relief valve if required by local code, equipment pad materials, automation wiring, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

This heater is designed for compatible propane gas pool and spa heating systems.

Common application references include:

• Residential inground pools
• Pool/spa combination systems
• Propane / LP gas equipment pads
• Replacing compatible 400K BTU propane heaters
• Compact heater retrofit installations
• Low NOx propane gas heating applications
• Automation-connected pool and spa systems

Always confirm fuel type, BTU requirement, propane gas line sizing, regulator requirements, electrical service, water flow, venting needs, elevation requirements, and local code requirements before ordering.

Installation Notes

This heater must be installed by a qualified pool professional, licensed gas technician, or licensed contractor as required by local code. Proper installation requires correct propane gas supply sizing, gas pressure verification, electrical wiring, bonding, grounding, water flow verification, plumbing layout, combustion air, and venting where required.

Before installation, confirm that the fuel type is propane / LP gas and that the gas supply can support a 400,000 BTU heater.

Water chemistry must be maintained within recommended ranges to protect the heat exchanger and preserve heater performance. Improper water balance, poor flow, incorrect gas pressure, or improper installation can damage the heater and may void warranty coverage.

Customer-Facing Q&A

Q: What is the Pentair EC-462029?
A: It is a Pentair MasterTemp 400 propane gas pool and spa heater rated at 400,000 BTU.

Q: What is the SKU?
A: The SKU is EC-462029.

Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379887353.

Q: What is the related Pentair part number?
A: The related part number is 460737.

Q: What fuel type does this heater use?
A: This model uses propane gas / LP gas.

Q: Is this a natural gas heater?
A: No. This is the propane model. Natural gas versions use different model numbers.

Q: How many BTUs is this heater?
A: This heater is rated at 400,000 BTU.

Q: Is this Low NOx certified?
A: Yes. This MasterTemp model is commonly listed as Low NOx certified.

Q: Does it have electronic ignition?
A: Yes. It uses electronic ignition / hot surface ignition and does not require a standing pilot light.

Q: Does this heater have digital controls?
A: Yes. It includes a digital control display with user-friendly operation and status monitoring.

Q: Is the control panel rotatable?
A: Yes. The control panel can rotate to multiple positions for easier viewing and installation access.

Q: Is this heater compact?
A: Yes. MasterTemp heaters are known for a compact footprint, commonly referenced around 21" x 21" x 28" for this model.

Q: Can this connect to pool automation?
A: Yes. It can work with compatible pool and spa automation systems when properly installed and configured.

Q: Should this heater be professionally installed?
A: Yes. Professional installation is strongly recommended because this heater requires proper gas, electrical, plumbing, venting, bonding, and safety setup.