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Rheem AVIA HD Series Low NOx Natural Gas Pool & Spa Heater in Size 399,000 BTU Model – P-M404A Series
$55.00
Starting at:
The Rheem AVIA HD Series is a high-performance natural gas pool and spa heater designed for reliable heating and smart system control. Available in multiple capacities, the AVIA series delivers fast heating, integrated Wi-Fi connectivity, and advanced corrosion protection for long-term durability.
With built-in smart controls, compact installation footprint, and low NOx certified operation, the AVIA heater provides efficient pool heating for residential pool and spa systems while allowing convenient temperature control from anywhere using the Raymote mobile app.
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Pool Heater Services in Greater Toronto Areas and Southern Ontario
Rheem AVIA HD Series Natural Gas Pool & Spa Heater – Supplied & Professionally Installed by 4Most Energy
The Rheem AVIA HD Series pool and spa heaters are designed to deliver reliable, high-performance heating for residential pools and spas. Available in multiple heating capacities, these natural gas heaters provide fast heat-up times while maintaining energy-efficient operation and low emissions.
The AVIA series features an advanced integrated control system with built-in Wi-Fi connectivity, allowing homeowners to monitor and adjust pool temperature remotely through the Raymote mobile app. Smart heater control and scheduling capabilities help automate pool heating while providing real-time alerts and system monitoring directly from a smartphone or tablet.
Each AVIA heater incorporates durable heat exchanger technology combined with the ProTek Shield™ corrosion protection module, which helps protect the heat exchanger from corrosion and prolong the life of the heater. The patented straight-tube heat exchanger design also improves serviceability and long-term reliability.
All AVIA models operate at approximately 84% thermal efficiency and are Low NOx certified, helping reduce emissions while maintaining strong heating performance for residential pool systems. The heater’s compact design and small equipment footprint allow installation on standard pool equipment pads, while the rotating top control panel provides flexible installation orientation.
Proper installation of a gas-fired pool heater is essential for safe and efficient operation. Gas supply sizing, electrical connections, combustion air requirements, and venting must all be installed correctly according to applicable installation codes and manufacturer specifications.
At 4Most Energy, our licensed technicians provide professional pool heater installation in Toronto, the GTA, and across Ontario, ensuring the Rheem AVIA heater is properly sized, installed, and commissioned for optimal performance and long-term reliability.
Rheem AVIA HD Series pool and spa Consumer Brochure
Warranty
The Rheem AVIA heater includes a limited manufacturer warranty (typically 3 years for residential installations) covering approved replacement parts.
4Most Energy Labour Warranty
When installed by 4Most Energy, customers receive a labour warranty covering installation workmanship for added peace of mind.
Why Install the Rheem AVIA HD with 4Most Energy?
- Integrated Wi-Fi Smart Control with Raymote™ mobile app for remote temperature management.
- 84% Thermal Efficiency for reliable and efficient pool heating performance.
- Low NOx Certified Burner System for environmentally compliant operation.
- ProTek Shield™ Module protects heat exchanger from corrosion and extends heater lifespan.
- Straight Tube Heat Exchanger Design improves serviceability and maintenance access.
- Compact 2 ft × 2 ft Equipment Pad Footprint simplifies equipment pad installations.
- 360° Rotating Top Panel allows flexible installation orientation.
- Smart Scheduling & Pool Learning Technology helps optimize heating time and efficiency.
| Specification | Value |
|---|---|
| Model | AVIA P-M404A-EN-C |
| Product Type | Pool & Spa Gas Heater |
| Fuel Type | Natural Gas |
| Input Capacity | 399,000 BTU |
| Thermal Efficiency | 84% |
| Heat Exchanger | Copper |
| Emissions | Low NOx Certified |
| Electrical Requirement | 120 / 240 V, Single Phase, 60 Hz |
| Water Connections | 2″ |
| Gas Connection | 3/4″ NPT |
| Vent Diameter | 4″ |
| Maximum Elevation | Up to 10,000 ft (Natural Gas) |
| Product Dimensions | 32.61″ W × 23.22″ D × 30.38″ H |
| Unit Weight | 135 lb |
| Certifications | CSA & ANSI Certified |
Pool Heater Sizing Guide
Recommended heating capacity based on pool size and usage.
Note: Proper sizing should always be confirmed with a professional pool installer.
| Model | Heating Capacity | Recommended Pool Size | Recommended Users |
|---|---|---|---|
| AVIA 264K (P-M264A) | 264,000 BTU | Small to medium residential pools | Typical family pools |
| AVIA 399K (P-M404A) | 399,000 BTU | Large residential pools or spa-pool combos | Homes with high heating demand |
Pool Heater Installation with 4Most Energy
Installing a gas pool heater requires careful planning to ensure safe gas supply, proper venting, and correct water flow rates.
- Request Installation Quote
Homeowners submit a request for pool heater installation in Toronto or the GTA.
- System Sizing Consultation
Our team evaluates pool size, plumbing configuration, and heating requirements.
- Equipment RecommendationWe confirm the appropriate heater capacity based on pool volume and desired heat-up time.
- Installation SchedulingA licensed technician schedules installation at a convenient time.
- Removal of Existing EquipmentOld heaters and connections are safely removed if required. New Heater Installation
- Includes:
Gas line connection
Water plumbing connections
Venting installation
Electrical power connection
Control setup
- Request Installation Quote
- Combustion Testing & Safety Verification
Gas pressure, ignition sequence, and combustion performance are verified.
- System Commissioning
Final system testing ensures proper heating operation and smart control configuration.
Installation typically includes
Heater placement and connection
Basic venting connection
Gas line connection within accessible range
Startup and testing
Installation typically excludes
Major gas line upgrades
Electrical panel upgrades
Concrete equipment pad construction
Payment is typically completed upon installation completion unless financing has been arranged.
Installation and Operation Manual PDF
Manufacturer Warranty
The Rheem AVIA heater includes a limited manufacturer warranty (typically 3 years for residential installations) covering approved replacement parts.
Warranty coverage may require:
Professional installation
Proper water chemistry
Regular maintenance
4Most Energy Labour Warranty
When installed by 4Most Energy, customers receive a labour warranty covering installation workmanship for added peace of mind.
Warranty Claims
If a component fails during the warranty period:
Contact 4Most Energy service support
A technician diagnoses the issue
Warranty parts are ordered if required
Repairs are completed by licensed technicians
Optional Maintenance Plan
Preventive maintenance plans start at:
$12.99 per month
Annual maintenance helps ensure reliable heater operation and protects the heat exchanger.
Maintenance includes:
Burner and combustion inspection
Gas pressure verification
Heat exchanger inspection
Water flow and sensor testing
System performance check
Customers can enroll in a maintenance plan at installation or anytime during the product lifecycle.
Service Area
Greater Toronto Area (GTA) and surrounding regions
Toronto, Markham, Richmond Hill, Vaughan, Aurora, Newmarket, Scarborough, Brampton, and Mississauga.
Extended Service Area: Stouffville, Oshawa, Barrie, Orangeville, Hamilton, St. Catharines, Guelph, Kitchener.
