Raypak 018033 Avia 404A Pool & Spa Heater, Natural Gas, Wi-Fi Control, Copper Exchanger, 399,000 BTU (P-R404A-EN-C), Rheem 018069

Raypak Avia 404A Natural Gas Pool & Spa Heater, 399,000 BTU, Copper Heat Exchanger

Model P-R404A-EN-C | Order # 018033 | 399,000 BTU input | Natural gas | Copper heat exchanger | Built-in Wi-Fi

The Avia 404A is the larger of the two Avia sizes, rated at 399,000 BTU per hour on natural gas for residential pools and spas. Wi-Fi is built into the control, so the heater can be set and watched from the Raymote phone app with no separate control panel. This version has the copper straight-tube heat exchanger and is rated at 84% thermal efficiency with Low NOx emissions.

✅ Made for:

• Natural gas, from sea level up to 10,000 ft (certified to 4,500 ft; above that a qualified technician adjusts the gas valve)
• Residential pools and spas on 2 in. plumbing, with 40 to 100 GPM of flow through the heater
• Outdoor pads using the vent cap supplied with the heater, or indoor and direct-vent installations with the venting Raypak specifies in the manual
• Replacing an older heater: Raypak laid out the water and gas connections to line up with common heaters, and the cabinet is about 23 in. square (Raypak calls it a 2x2 footprint)

🔧 Details:

• Input: 399,000 BTU per hour (116.9 kW). Thermal efficiency 84%. Low NOx.
• Fuel: natural gas. Supply pressure 3.5 in. WC minimum while firing, 10.5 in. WC maximum static.
• Heat exchanger: copper, straight-tube design, with a polymer inlet/outlet header and a stainless steel combustion chamber.
• Water connections: 2 in. Two 2 in. CPVC tailpieces with ring nuts and O-rings come in the carton.
• Gas connection: 3/4 in. NPT. Flue: 4 in.
• Power: 240 V as shipped, convertible to 120 V, single phase, 60 Hz. Draws about 1.2 A at 240 V or 1.6 A at 120 V. Not for 208 V.
• Control: touchpad with LCD display, pool and spa modes, and Wi-Fi for the Raymote app. A 3-wire remote harness is included for automation systems, and the control can run a Raypak Protégé or AquaStar Smart variable-speed pump.
• ProTek Shield module on the water inlet protects the heat exchanger from galvanic corrosion (replacement module 017960F).
• Cabinet: 23.24 in. wide x 23.22 in. deep x 30.38 in. high, not counting the outdoor vent cover on one side and the water header on the other. Weight 135 lb, 155 lb shipping.
• Also in the carton: 120 V blower adapter, auxiliary harness and Raymote quick start guide.
• Certified to ANSI Z21.56 / CSA 4.7, SCAQMD Rule 1146.2 and SJVAPCD Rule 4308.
• Raypak limited warranty: 3 years parts and labor when installed by a licensed installer at a single-family home; 1 year in any other setting.
• UPC 840891047292.
• Rheem cross-reference: Rheem item 018069, model P-M404A-EN-C, is the same heater sold under the Rheem label.
• Ruud cross-reference: Ruud item 018093, model P-D404A-EN-C, is the same heater sold under the Ruud label.

📌 Good to know:

• The ProTek Shield is a wear part. Raypak says to replace it once it is down to about 40% of its original weight.
• Raypak requires a sediment trap on the gas line. Chlorinators and chemical feeders go downstream of the heater, with a check valve between them.
• Keep the heater at least 3 ft from a heat pump or outdoor condensing unit.
• Connecting to Raymote needs a reliable Wi-Fi signal at the equipment pad.

Gas, venting and electrical work must be done by a qualified installer and meet local codes.