You have a Bell & Gossett Flo-Control valve on the primary secondary bridge of an older hydronic system. It has been there for over five …
Heat Pump Water Heaters: Drive Down First Cost Using Hybrid Solutions (Part 11)
The owner of a local engineering firm recently said to me, “First cost and space are key discussion points in any building design.” First cost …
Heat Pump Water Heaters: Hot Water Recirculation (Part 6)
How does the commercial heat pump water heater, using the preferred R-744 refrigerant, handle the domestic hot water recirculation load? The R-744 (carbon dioxide) heat …
Top 10 Things You Should Know About Commercial Electric Boilers (Part 2)
Welcome back to Part Two of our top 10 things to know about commercial electric boilers. As mentioned last week, HVAC and Plumbing Engineers are …
Top 10 Things You Should Know About Commercial Electric Boilers (Part 1)
HVAC and Plumbing Engineers are discussing more decarbonization and electrification of systems with their clients. The use of electric boilers vs. gas fired condensing boilers …
Carbon Reduction is the Dream. Here’s How to Make it a Good One.
Carbon reduction in building design is critical to the lifestyle of our future generations. Most engineers and their owner clients understand the concerns and welcome …
What is a Flexible Tube Condensing Boiler? Why My Client May Want It
Heating and cooling service contractors take the brunt of complaints over the high cost of condensing boiler repairs. A high efficiency condensing boiler heat exchanger …
Primary-Secondary Variable Heating Systems: Should I Pump Into the Boiler or away from It?
Previously, the R. L. Deppmann Monday Morning Minutes looked at pump location in a primary-variable boiler heating system. We made a very definitive statement about …
Primary Variable Heating Systems: Should I Pump Into the Boiler or Out of It?
We recently received several calls for our recommendation on whether to pump into the boiler or out of the boiler in a primary variable heating …
Condensing Boiler Venting Material (Part 1)
Proper venting of hydronic condensing boilers is critical for the safety of occupants and the successful operation of the heating plant. The materials that may …
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