What is the difference between Pentair ASME and ASME HD Pool Heaters?

The main difference between Pentair ASME pool heaters and Pentair ASME HD (Heavy Duty) pool heaters lies in their construction and durability, especially regarding usage in commercial or more demanding environments.

1. Pentair ASME Pool Heaters:

   • Designed to meet ASME (American Society of Mechanical Engineers) standards, which are stricter than residential requirements.
   • Suitable for both residential and light commercial use.
   • Made to ensure efficiency, reliability, and safety, especially where ASME certification is required by code.
   • They generally use durable components but are more suited to environments that don't require extremely heavy-duty usage.

2. Pentair ASME HD (Heavy Duty) Pool Heaters:

   • Built with even more robust materials compared to standard ASME heaters, offering higher resistance to wear and tear.
   • Specifically designed for high-demand environments like commercial pools, public facilities, or places where they will be used more intensively.
   • These heaters feature heavy-duty copper or cupro-nickel heat exchangers, which enhance corrosion resistance and durability in harsh conditions like saltwater or high-use environments.

In short, ASME HD models are a step up in terms of durability and are recommended for heavy commercial use, while standard ASME models can be used in both residential and light commercial settings.