The Raypak 013731 B-R408-EN-X ASME Professional Natural Gas Heater is a heavy-duty 406,000 BTU heater engineered for commercial and institutional pool applications. With ASME certification, robust construction, and advanced safety features, it delivers reliable, high-capacity heating performance for demanding environments. 

Key Features

• 406,000 BTU natural gas pool and spa heater

• ASME-certified for commercial and institutional use

• Cupro-nickel heat exchanger provides durability and resistance to corrosion

• Heavy-duty cast iron headers for strength and longevity

• Designed for high-demand environments such as hotels, municipalities, and aquatic facilities

• Advanced safety features including temperature and pressure relief options

• Built-in bypass ensures proper water flow and efficient heating

• Rugged, weather-resistant construction for long service life

• Meets low NOx emission standards for environmental compliance

Product Overview

The Raypak 013731 B-R408-EN-X ASME Professional Natural Gas Heater is designed to provide reliable and powerful heating for large pools and spas in commercial settings. With a 406K BTU output, it delivers rapid heat-up and consistent temperature control, even under continuous use.

ASME certification ensures compliance with commercial codes and standards, making this heater ideal for public and high-use installations. The cupro-nickel heat exchanger resists corrosion from harsh water chemistry, while the cast iron headers add further durability and strength.

Engineered for reliability, safety, and efficiency, the Raypak 013731 also incorporates features such as a built-in bypass and advanced safety controls to maintain proper operation. With low NOx emissions and a rugged design, this heater balances performance and environmental responsibility, making it a trusted choice for professional installations.