Serving DC, VA & MD
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ETERNAL ADVANCED HYBRID WATER HEATING

The future of water heating has taken a major leap forward. The Eternal hybrid combines the best of tank and tankless technologies and brings you an advanced and extremely eco-friendly hot water heating solution.

No matter which Eternal you choose, you'll get endless hot water, consistent pressure and never a cold water sandwich. When installed in optional recirculation, you'll save water by never waiting for hot water again.

The Future is Here - Up to 98% Efficient - The Eternal Condensing Hybrid 

Highly Rated & Regarded

Clean

  • All Stainless Steel Heat Exchanger with built in 2 gallon reserve tank
  • Meets NSF Standards for health and cleanliness
  • Ultra low emissions (1ppm CO) leaves almost no carbon footprint and is safe
  • Patented self-cleaning utilizes turbulent flow to flush sediments out 

Clever

  • Up to 98% Efficiency saves cost, exceeds Energy Star standards, and qualifies for Tax and LEED credits
  • Compact chassis can wall or floor mount; standard water connects on top
  • Flexible NG / LP / Indoor / Outdoor / Direct Vent / Power Vent conversions in one unit
  • 2" PVC up to 35ft or 3" PVC venting up to 100ft
  • Dual Core CPU displays error codes and optionally controlled by up to 3 remotes
  • Clip-on components can be easily serviced by technicians

Confident

  • Full flow design enables high output without water pressure drop
  • Thermostat and Flow Activation is compatible with WaterSense fixtures
  • Easy integration with recirculation and no startup lag eliminates cold water sandwich
  • Meets UL / CSA / ANSI / NSF and UPC standards
  • Industry's BEST 15 year residential and 5 year commercial no leak heat exchanger warranty
The Trusted team
  • 1. Highly Accredited & Highly Rated With 1000's of 5-Star Reviews
  • 2. 100+ Years of Experience Serving Generations of Families
  • 3. Regular Rates 7 Days a Week For Your Convenience
Serving Washington DC, Maryland & Virginia
If you are looking for an HVAC contractor, plumber, electrician, or remodeling crew in the Maryland, Northern Virginia, or metro D.C. regions, trust John C. Flood to take care of the job.
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    “My technician Hudson was personable and willing to explain what he was doing and why.”

    - Elle E.
Thousands of 5 Star Reviews
We have served generations of families in this area, and because of our focus on stellar customer service, we are proud to boast thousands of happy customer reviews on Google and Customer Lobby. Our goal is to keep you and your family comfortable throughout the year, and you can count on us to do the job right the first time.
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