Norm Hall
/
November 28, 2022
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... READ MORE
Printer Friendly (PDF)
Decarbonization does not always automatically become electrification. The enterprising engineer will first look at diverse ways to reduce the carbon use. Here is an example... READ MORE
Printer Friendly (PDF)
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... READ MORE
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... READ MORE
Printer Friendly (PDF)
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... READ MORE
Printer Friendly (PDF)
Minimum Flow in a Variable Speed Pump: A Great Example
Norm Hall
/
March 14, 2022
What is the minimum flow rate a variable speed pump can provide without damage to the pump? This is a question every engineer should ask... READ MORE
Printer Friendly (PDF)
Condensing Boiler Temperature Reset for Increased Efficiency (Part 3 of 4)
Norm Hall
/
February 14, 2022
We are continuing with the series on Condensing Heating System Efficiency. Today, we are discussing condensing boiler temperature reset for increased efficiency. Hydronic condensing heating... READ MORE
Printer Friendly (PDF)
Hydronic System Design – High Delta T Can Improve Boiler Efficiency (Part 2 of 4)
Norm Hall
/
February 7, 2022
How can you increase the operating efficiency of your condensing boiler heating system? This question was raised in the last R. L. Deppmann Monday Morning... READ MORE
Printer Friendly (PDF)
You understand the differences between premium efficiency (IE3) motors and PMAC or ECM motors (IE4&5). You understand the cost implications of both styles of motors.... READ MORE
Printer Friendly (PDF)
Can I and should I specify permanent magnet motors (PMAC) on my hydronic system pumps? The last R. L. Deppmann Monday Morning Minutes showed the... READ MORE
Printer Friendly (PDF)