Models: HC800 HC1000

The First Fire Tube Condensing Water Heater from Patterson-Kelley.

New for 2018, the first commercial-grade instantaneous fire tube condensing water heater from Patterson-Kelley. The P-K HiDRA delivers hot water in an instant while the recirculating pump mixes for consistent hot water output.

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Options and Accessories

Tie-ins for building recirculation is standard with the P-K HiDRA; however, users can opt for a building recirculation pump.  Additionally, the HiDRA can be set up as a single unit or in a cascading domestic water mode.

NURO® Touch-Screen Control System

Connect to your system, anytime from anywhere with NURO Connect

The P-K HiDRA is equipped with the most intuitive interface in the industry, the NURO Touch-Screen Control. With the NURO Connect app, users can a smartphone to monitor their systems.


  • Models ranging up to 1000 MBTU
  • Sports the most technologically advanced NURO Touch-Screen Control
  • Anticipated temperature control to rapidly respond to varying flow conditions
  • 5:1 turndown


  • Up to 97% efficient
  • Warranty:  10 Year Heat Exchanger, 20 Year Shell
  • ASME / CSA Certified
  • NSF Compliant
  • Meets ASHRAE 90.1
  • ASME Section IV HLW Rated

Discover the HiDRA’s applications and best practices.

Check out the P-K HiDRA™ Product Insight Webinar

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