Rheem AVIA HD 018081 NiTek Natural Gas Pool Heater - 399,000 BTU
$4,600.00
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Rheem AVIA HD 018081 NiTek Natural Gas Pool Heater - 399,000 BTU
$4,600.00
Available to order
Free standard shipping · eligible US orders
Standard shipping: 3–5 business days (estimated).
Pickup currently not available
Check delivery timing for your ZIP code
Large equipment may ship by freight and require a delivery appointment.
Final shipping options and applicable taxes are confirmed at checkout.
The Rheem AVIA HD 018081 is a natural gas pool and spa heater with a NiTek heat exchanger.
Model details
- Model P-M404A-EN-N / 404A
- 399,000 BTU input
- Low-NOx design
- NiTek heat exchanger
- Digital controls and integrated Wi-Fi
- Raymote app connectivity
Requires professional installation, correctly sized natural gas service and compatible electrical supply. Confirm installation clearances and local requirements before ordering.
Fuel and heater sizing
This is the natural gas configuration. Confirm that your supply matches before ordering. Gas-heater BTU input is the fuel input rating; usable heat output also depends on thermal efficiency. Pool volume, starting water temperature, desired warm-up time and heat loss determine the capacity needed.
Installation requirements
A qualified installer should confirm gas-line capacity and pressure, electrical supply, water flow, equipment clearances and installation altitude. Indoor installations need the correct manufacturer-approved venting arrangement. Check the existing pad and plumbing connection positions when replacing another heater; matching BTU size alone does not guarantee a direct fit.
Complete the installation
Site-specific gas fittings, electrical work, venting accessories and installation labor are separate. For remote control, verify the listed interface and any required network or automation hardware. Maintain the manufacturer's water-balance targets and keep the circulation system in good condition to protect the heat exchanger.
Compatibility & installation
Check the exact model and the specifications above before ordering. For equipment and replacement parts, confirm the required voltage, connections, dimensions and compatibility with your existing system.
Need help? Contact us with your model number before purchasing. Equipment requiring electrical, gas or plumbing connections should be installed by a qualified professional.
Shipping & Delivery
We ship within the United States. Standard shipping is currently free for eligible destinations at checkout. Faster shipping options are shown when available for your order; the final options and charges appear at checkout.
Dispatch and arrival dates depend on the item, destination and shipping method. Need an estimated arrival date before ordering? Contact us with the product model and delivery ZIP code.
Large equipment may ship by freight and require a delivery appointment. Inspect the shipment on arrival, photograph visible damage and note it on the delivery receipt.
Returns
Eligible products may be returned within 30 days of delivery if new, unused, uninstalled and in their original packaging. A restocking fee of up to 20% may apply; return shipping and other conditions apply.