A larger pool or a pool-and-spa combination that needs fast heat-up in any weather.
★★★★★ 230+ Google Reviews · CPO C-105377 · 40+ years of combined founder experience
Sizing comes first.The right heater is set by your pool's surface area and the temperature rise you want, and by the flow your pump and plumbing deliver. Start with the heater size calculator; we confirm it on site before quoting.
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P-R404A-EN-C
Pending
From the manufacturer's documents listed under Sources. Where the documents disagree, the table says so.
| Manufacturer model number | P-R404A-EN-C, catalog no. 018033 (P-R404A-EP-C / 018039 is the propane version) |
|---|---|
| BTU input | 399,000 BTU/hr (Raypak lists it as 399 MBTU/h; the line is named 404) |
| Thermal efficiency | 84% |
| Heat exchanger | Copper straight tube; stainless steel combustion chamber |
| Corrosion protection | ProTek Shield replaceable sacrificial anode in the inlet header |
| Water connections | 2" buttress union inlet and outlet |
| Water flow | 40 GPM minimum, 100 GPM maximum (external bypass valve required above 100 GPM) |
| Gas connection | 3/4" NPT; sediment trap required on every installation |
| Inlet gas supply pressure | Natural gas 3.5" W.C. dynamic minimum, 10.5" W.C. static maximum; propane 8.0" / 13" |
| Electrical | 120 VAC 1-phase at 1.6 A, or 240 VAC 1-phase at 1.2 A |
| Venting | Category I and Category III; 4" flue; certified indoor or outdoor with the right vent cover |
| Elevation | Natural gas 0-10,000 ft; propane 0-4,500 ft (4,501-7,800 ft with kit 018762F) |
| Clearances (outdoor) | Top unobstructed; 3" from the water-side panel; 6" from the vent cap |
| Dimensions | 30.38" H x 23.24" W x 32.61" D |
| Weight | 135 lbs (155 lbs shipping) |
| Certification | ANSI Z21.56 / CSA 4.7 and CAN/CGA-2.17-M91; SCAQMD Rule 1146.2 and SJVAPCD Rule 4308 low NOx |
| Controls and automation | Digital control with integrated Raymote Wi-Fi (free app control and fleet monitoring dashboard); auxiliary dry-contact control output; two-wire or three-wire remote for third-party automation; RS-485 Modbus for Raypak AquaStar variable-speed pumps and The Attendant. |
Parts
3 years
Labor
3 years
Heat exchanger
Under the parts term
| Parts | 3 years |
|---|---|
| Labor | 3 years |
These are the manufacturer's published terms. Terms can depend on the installer, the dealer program and where the heater was bought, and they change without notice, so we confirm the exact term for your install on the written quote.
The traditional material and the cheapest to build. It transfers heat well and does fine on well-balanced chlorine water, but it's the least forgiving of low pH, high chlorine and salt. Water chemistry has to stay in range for a copper exchanger to reach its full life.
See every material side by side on the comparison page, or read the Raypak fault codes guide for what the display is telling you.
Most to least forgiving of salt and unbalanced water.
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App control through automation
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Automation relay (no heater app)
Every figure on this page comes from these manufacturer documents. We re-open each one and match the model number, capacity and efficiency before the date moves. How we verify.
| Document | Type | Last checked |
|---|---|---|
| Raypak — AVIA Pool & Spa Heater product page (model table, input rates, thermal efficiency, venting, Raymote)raypak.com | Product page | October 14, 2026 |
| Raypak — AVIA brochure, RP-P-600-1 Rev E (full part-number table with catalog numbers, thermal efficiency, elevation ratings, weights, dimensions, gas connection, NiTek and ProTek Shield)s3.amazonaws.com | Spec sheet or brochure | October 14, 2026 |
| Raypak — AVIA Installation & Operation Manual, 100-10000111 (gas pressures, flow rates, clearances, certifications, ProTek Shield, Unitherm Governor, Raymote and RS-485 wiring, cold-weather operation)s3.amazonaws.com | Manual or guide | October 14, 2026 |
| Raypak — Pool Heater Limited Warranty, P/N 100-10000378 Rev. 09, effective 06-27-2025 (AVIA 3 years parts and labor; heat pumps 2 years labor / 7 years parts / 10 years titanium tube; authorized-dealer condition)s3.amazonaws.com | Warranty terms | October 14, 2026 |
Manufacturers revise terms without notice. Treat this page as a starting point and confirm the current terms before you buy. If something here is out of date, tell us and we'll fix it.
Parts: 3 years. Labor: 3 years. These are the manufacturer's terms as published; warranty terms change and can depend on the installer and the channel, so we confirm the exact term for your install on the written quote.
The P-R404A-EN-C is rated at 399,000 BTU/hr input. Heater size comes from your pool's surface area and the temperature rise you want, not from gallons, and the pump and plumbing have to deliver the flow the heater needs. Use our heater size calculator for a starting number, and we confirm it on site before quoting.
Yes. The P-R404A-EN-C has built-in Wi-Fi, and it also connects to automation through a relay.
The traditional material and the cheapest to build. It transfers heat well and does fine on well-balanced chlorine water, but it's the least forgiving of low pH, high chlorine and salt. Water chemistry has to stay in range for a copper exchanger to reach its full life.
Every figure on this page comes from the manufacturer's own documents, listed under Sources with the date we last checked them. Manufacturers revise terms without notice, so treat the page as a starting point and confirm the current terms on your quote.
We quote, install and service Raypak heaters across Palm Beach and Broward, managed by us under our Florida Certified Pool/Spa Contractor license (CPC1461731). You get a free on-site sizing visit and one written price. Gas lines, new circuits and refrigerant work are done by licensed contractors we manage.
We call back within 30 minutes during business hours.
