Product Overview
The Pentair MasterTemp 400K High Performance Pool & Spa Heater | EC-462028 is a powerful natural gas heater designed for fast, dependable heating in residential pool and spa systems. With 400,000 BTU heating capacity, this model is ideal for larger pools, spas, and pool/spa combinations that need rapid heat-up performance.
The MasterTemp series is known for its compact footprint, quiet operation, energy-efficient performance, and user-friendly digital controls. This natural gas model uses premix combustion technology, electronic ignition, and a copper heat exchanger to deliver efficient heat transfer and reliable operation.
Its rotatable digital display and compact cabinet make installation and service easier on many equipment pads, while Low NOx operation helps meet modern emissions requirements.
Ideal For
- Residential inground pools
- Pool and spa combination systems
- Larger pools requiring fast heat-up
- Natural gas pool heating systems
- Replacing older natural gas heaters
- Customers wanting digital heater controls
- Low NOx heater replacement applications
- Compact equipment pad installations
- Pool owners wanting quiet heater operation
- Professional pool heater installations
Key Features
- 400,000 BTU heating capacity — delivers strong heating performance for pools and spas.
- Natural gas operation — designed for properties with compatible natural gas service.
- Low NOx certified design — engineered for cleaner combustion and reduced emissions.
- Premix combustion technology — supports fast and 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 viewing and service access.
- Compact cabinet design — helps fit smaller or crowded equipment pads.
- Rustproof composite exterior — built for outdoor pool equipment environments.
- Quiet operation — designed for a more comfortable poolside experience.
- Copper heat exchanger — provides efficient heat transfer for standard pool and spa applications.
- Automation compatible — works with compatible pool and spa automation systems when properly configured.
Benefits
The Pentair EC-462028 MasterTemp 400K Natural Gas 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 display and indicator lights make operation simple, while the rotating control panel helps installers position the controls where they are easiest to access. The compact cabinet is useful for tight equipment pads, and the rustproof exterior supports long-term outdoor performance.
For pool professionals, the MasterTemp platform provides a dependable, service-friendly natural gas heater with proven Pentair performance and strong residential heating capacity.
Specifications
| Specification | Details |
|---|---|
| Product Name | Pentair MasterTemp 400K High Performance Pool & Spa Heater |
| Brand | Pentair |
| Series | MasterTemp |
| Part Number | EC-462028 |
| Related Part Number | 460736 |
| SKU | EC-462028 |
| UPC / GTIN | 788379887346 |
| Product Type | Pool and spa gas heater |
| Heater Type | Natural gas heater |
| Fuel Type | Natural gas |
| BTU Input | 400,000 BTU |
| BTU Class | 400K BTU |
| Ignition Type | Electronic ignition / hot surface ignition |
| Control Type | Digital control display |
| Control Panel | Rotating control panel |
| Emissions Rating | Low NOx certified |
| Combustion System | Premix combustion technology |
| Heat Exchanger Material | Copper |
| Header Material Reference | Polymer headers |
| Voltage | 120/240V, depending on installation configuration |
| Frequency | 60 Hz |
| Plumbing Connection | 2" water connections / unions |
| Installation Location | Outdoor or approved properly vented indoor installation |
| Cabinet Type | Rustproof composite exterior |
| Approx. Dimensions | 21" L x 21" W x 28" H |
| Application | Pool and spa heating |
| Pool Type | Residential inground pool and spa systems |
| Automation Compatibility | Compatible with pool and spa automation systems when properly configured |
| Equipment Category | Pool heaters |
| Professional Installation Recommended | Yes |
| Sold As | Each |
Included Components
- 1 × Pentair MasterTemp 400K natural gas pool and spa heater
- Integrated digital control display
- Electronic ignition system
- Premix combustion burner system
- Internal copper heat exchanger and header assembly
- Manufacturer-supplied installation documentation
Natural 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 natural gas pool and spa heating systems.
Common application references include:
- Residential inground pools
- Pool/spa combination systems
- Natural gas equipment pads
- Replacing compatible 400K BTU natural gas heaters
- Compact heater retrofit installations
- Low NOx natural gas heating applications
- Automation-connected pool and spa systems
Always confirm fuel type, BTU requirement, 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 natural 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 natural gas and that the gas supply can support a 400,000 BTU heater.
Water chemistry must be maintained within recommended ranges to protect the copper 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-462028?
A: It is a Pentair MasterTemp 400K natural gas pool and spa heater rated at 400,000 BTU.
Q: What is the SKU?
A: The SKU is EC-462028.
Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379887346.
Q: What is the related Pentair part number?
A: The related part number is 460736.
Q: What fuel type does this heater use?
A: This model uses natural gas.
Q: Is this a propane heater?
A: No. This is the natural gas model. Propane 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: What heat exchanger does this model use?
A: This standard MasterTemp model uses a copper heat exchanger.
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.