Raypak Professional Digital Natural Gas Pool Heater, 399,000 BTU, Cupro-Nickel | 013744

Raypak Professional Series Digital B-R408-EN-X #51 — 399,000 BTU Natural Gas Cupronickel Heater (2,000–6,000 ft)

The B-R408-EN-X is Raypak's top-tier Professional Series heater — bronze headers, cupro-nickel heat exchanger, natural gas, maximum 399,000 BTU output. This #51 version is rated for 2,000–6,000 ft elevation; if you're below 2,000 ft, order the #50 version instead.

Quick Stats

• 399,000 BTU input — the highest output in this lineup
• Natural gas
• Cupro-nickel heat exchanger — better corrosion resistance than copper
• Bronze headers — Professional Series construction
• Rated for 2,000–6,000 ft elevation — confirm your installation elevation before ordering
• Digital electronic ignition with on-board diagnostics

How to Read a Raypak Digital Model Number

[Header]-R[BTU]A-[Ignition][Fuel]-[Material] #[Elevation] — B = Bronze headers (Professional Series) vs. P (Polymer, standard Digital line). E/M = ignition, N/P = fuel, C/X = tube material. #50/#51/#52 = elevation: 0–2,000 ft / 2,000–6,000 ft / 6,000–9,000 ft.

Is the Professional Series Worth the Premium?

This is the top of Raypak's residential/light-commercial lineup — bronze headers and cupro-nickel construction built for the heaviest duty cycles. Makes sense for commercial pools, high-use facilities, or harsh water chemistry. For a typical residential pool, the standard copper Digital line at 399,000 BTU usually delivers the same practical performance for meaningfully less money.

Install Note

Gas heater installation involves gas line sizing, venting, and electrical work — use a licensed professional per local code. Confirm elevation, gas type, and BTU needs with your installer before ordering.