Coffee with Caleffi™ Webinar Series: Between the Lines - DHW Return Design

DHW Return Design

Domestic hot water (DHW) sizing and design is critical to optimize energy efficiency, reduce water waste, and improve safety. Host Christoph Lohr, P.E. returns to the webinar series to detail the engineering methods that can help designers right-size their hot water return (HWR) system at the next Coffee with Caleffi webinar on Thursday, Feb. 22 at 12:00 p.m. CST.

Lohr is IAPMO’s Vice President of Technical Services and Research. He has over a decade of experience in designing plumbing systems and has a reputation as a resultsoriented expert, particularly in the realm of balancing waterborne pathogen prevention and water sustainability. Lohr is a distinguished graduate from the Virginia Military Institute, with a Bachelor of Science in Mechanical Engineering.

A Certificate of Attendance is emailed to attendees following the event for continuing education audits. The monthly educational webinars are free and are intended for engineers, contractors, designers and wholesalers.

Visit our website at for schedule details and registration requirements.


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