Resources

What to do About DHW

A photo of a Cleaver Brooks scotch marine steam boiler.

A presentation based on research by Steven Winter Associates

Key Takeaways

  • Separating domestic hot water (DHW) production from the typical central heating plant can save energy, but not nearly as much as many auditors believe.
  • Load reduction is the most effective way to reduce DHW energy intensity, but new energy conservation measures are necessary for meeting our climate goals.

Executive Summary

NYC auditors often recommend separating heating and hot water production, but does it pay back? The energy savings often aren’t enough to justify the high cost of replacement. Fuel usage was analyzed from a sample NYC multifamily buildings, and many sites realized poor savings from installing a dedicated DHW plant.  More substantial carbon savings energy and water savings can be achieved with load reduction measures and smart electrification. This is a presentation by Nicole Ceci of Steven Winter Associates at the 2017 NESEA BuildingEnergy NYC Conference.

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