Product Overview
The Sta-Rite Max-E-Therm SR400NA is a high-performance 400,000 BTU natural gas pool and spa heater designed for fast heat-up, reliable operation, and compact equipment pad installation. Built by Pentair, the Max-E-Therm series is known for strong heating performance, lightweight construction, and a corrosion-resistant exterior housing.
This natural gas model is ideal for residential pools and spas where quick temperature recovery and dependable heating are needed. The easy-to-read digital control panel helps simplify operation, diagnostics, and temperature control.
Ideal For
In-ground pools and spas that need a powerful 400,000 BTU natural gas heater for fast heating, seasonal pool extension, spa heating, or replacement of an existing gas heater.
Key Features
- 400,000 BTU natural gas pool and spa heater
- Compact design for easier equipment pad installation
- Lightweight construction compared to many traditional gas heaters
- Digital control panel for simple temperature adjustment
- Self-diagnostic controls help identify heater or system conditions
- Low-NOx certified design
- Corrosion-resistant Dura-Glas exterior housing
- Designed for pool and spa applications
- High-efficiency heating performance
- Built-in inlet and outlet union connections
- Professional installation recommended
Benefits
The Sta-Rite Max-E-Therm SR400NA gives pool owners powerful heat output in a compact and durable heater design. With 400,000 BTU of heating capacity, this unit is a strong option for customers who want faster heat-up times for larger pools, attached spas, and colder weather operation.
The Dura-Glas housing helps protect the heater from outdoor conditions, while the digital control panel and built-in diagnostics make operation and troubleshooting easier for service professionals.
Specifications
| Specification | Details |
|---|---|
| Brand | Sta-Rite / Pentair |
| Series | Max-E-Therm |
| Product Type | Pool & Spa Gas Heater |
| Part Number / SKU | SR400NA |
| Heater Size | 400,000 BTU |
| Fuel Type | Natural Gas |
| Ignition Type | Electronic Ignition |
| Application | Pool and Spa |
| Installation Type | Outdoor Pool Equipment Pad |
| Low NOx Certified | Yes |
| Housing Material | Dura-Glas Corrosion-Resistant Housing |
| Control Type | Digital Control Panel |
| Heat Exchanger | Copper |
| Electrical | 120/240 VAC |
| Plumbing Connections | Built-in inlet/outlet union connections |
| Barcode / UPC | 022315208285 |
Confirm Before Ordering
Please confirm fuel type, BTU size, gas line sizing, electrical requirements, plumbing configuration, local code requirements, and installation location before ordering. This model is natural gas and is not the propane version. Professional installation by a qualified pool heater technician is strongly recommended.
Customer-Facing Q&A
Is the SR400NA natural gas or propane?
The SR400NA is the natural gas version.
How many BTUs is this heater?
This model is rated at 400,000 BTU.
Can this heater be used for both pools and spas?
Yes. The Sta-Rite Max-E-Therm SR400NA is designed for pool and spa heating applications.
Does this heater have a digital control panel?
Yes. It includes a top-mounted digital control panel with diagnostic features.
Is this a Low NOx heater?
Yes. The SR400NA is certified for Low NOx emissions.
Can this replace an older Sta-Rite or Pentair heater?
It may be a suitable replacement depending on the existing gas type, plumbing, electrical setup, venting requirements, and installation location. Confirm compatibility before ordering.
Does this heater require professional installation?
Yes. Gas pool heaters should be installed by a qualified pool professional or licensed gas technician.