Air-to-water heat pumps provide a way to migrate existing hydronic heating systems supplied by fossil fuel boilers to sustainable electric energy. In many projects there are compelling advantages for retaining the existing boiler and adding the heat pump to create a “dual-fuel” system. These systems will likely be the most common application for air-to-water heat Read more
P.E.

Air-to-water heat pumps provide a way to migrate existing hydronic heating systems supplied by fossil fuel boilers to sustainable electric energy. In many projects there are compelling advantages for retaining the existing boiler and adding the heat pump to create a “dual-fuel” system. These systems will likely be the most common application for air-to-water heat pumps in the near future as carbon reduction regulations reshape the market.

You’ll learn:
→ What’s the highest water temperature an air-to-water heat pump can produce?
→ Are buffer tanks always needed in systems with air-to-water heat pumps?
→ Should air-to-water heat pumps be connected in series with boilers?
→ Can air-to-water heat pumps be retrofitted to systems that use fin-tube baseboard?
Hydronics guru John Siegenthaler, P.E. will discuss the benefits of dual-fuel systems while examining the technical details for piping and controls in this 90 minute extended Coffee with Caleffi webinar edition on Thursday, Nov. 30 at 12:00 p.m. CST.
Siegenthaler is a seasoned industry leader and passionate teacher, eager to share his over 40 years’ experience in the understanding and proper application of water-based engineering principles with our audience.
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.

Can a hydronic system effectively – and efficiently – provide heating, cooling, domestic hot water AND heat recovery ventilation in a residential home? John Siegenthaler, P.E., a favorite to the webinar series, will discuss design details, challenges and lessons learned from a from a recent project profile of a modern hybrid approach utilizing an air-to-water heat Read more
Can a hydronic system effectively – and efficiently – provide heating, cooling, domestic hot water AND heat recovery ventilation in a residential home? John Siegenthaler, P.E., a favorite to the webinar series, will discuss design details, challenges and lessons learned from a from a recent project profile of a modern hybrid approach utilizing an air-to-water heat pump system that checks all of the boxes during this 90-minute extended edition.
You’ll learn:
→ Back-up heating. When is it necessary?
→ Can a single 44 watt circulator supply all space heating flow for a 2,300 square foot house?
→ Does chilled water cooling and heat recovery ventilation require separate duct systems?
→ Can panel radiators operate at supply water temperature below 100 ºF on design days?
→ Where does an “extended manifold” piping system make sense?
→ How are 3-way diverter valves applied in air-to-water heat pump systems?
→ What are the advantages of multi-zone heating combined with single-zone cooling?
Siegenthaler is a seasoned industry leader and passionate teacher, eager to share his over 40 years’ experience in the understanding and proper application of water-based engineering principles with our audience. He is the principal of Appropriate Designs and a regular contributor to industry publications.
Coffee with Caleffi technical training webinars are free and intended for contractors, designers and wholesalers. A Certificate of Attendance is emailed to attendees following the webinar for continuing education consideration. Want to join us? Simply register today.