Raypak 336A ASME Digital NG Heater, 332.5K BTU

The Raypak 017373 (B-R336A-EN-C) is a 332,500 BTU natural gas commercial pool and spa heater for facilities that require ASME certification at the 336A BTU range. It's the copper heat exchanger version of the ASME 336A line — the right spec for chlorinated commercial pools at public facilities, condos, HOAs, and apartments where local code demands pressure vessel compliance but saltwater isn't a factor.

This model replaces the Raypak 009270. The current replacement model is 017373.

Key Features

• 332,500 BTU natural gas input — electronic ignition, factory plumbed and test-fired before shipping
• ASME certified with bronze headers — meets commercial pressure vessel code for public and multi-unit installations; each heat exchanger individually inspected by a state official
• Copper fin tube heat exchanger with stainless steel tube sheets — fully nonferrous waterway; .065" wall integral fin tubing, over 50% thicker than standard
• ProTek Shield module included — sacrificial protection for the heat exchanger, replaceable to extend heater life
• Unitherm Governor + automatic bypass — prevents condensation and scale buildup; handles flow rates up to 125 GPM without modification

Need ASME compliance with saltwater or aggressive water chemistry? Step up to the 017402, which pairs the same ASME bronze header construction with a cupronickel heat exchanger.

This model uses a copper heat exchanger and is not the right choice for saltwater pools. Professional installation by a licensed contractor is required to validate the Raypak warranty. Check local codes and permit requirements before purchase — some jurisdictions require additional inspections for ASME-certified equipment. Rated for elevations 0–2,000 ft. only.