This R. L. Deppmann Monday Morning Minutes series will focus on the design of domestic hot water recirculation systems in the plumbing portion of the …
Variable Speed and ECM Smart Pumps in Domestic Hot Water Recirculation Systems
Domestic hot water supply temperatures and the recirculation system control are receiving a great deal of attention these days. Concerns about legionella growth with low-temperature …
Variable Flow in Hydronic Systems with Three-Way Control Valves
Often times, the engineer is replacing the existing secondary pump in a system with a combination of two way and three-way control valves. How do …
R.L. Deppmann – Detroit Area Office and Warehouse Relocation
This Monday Morning Minute is very self-serving. We want everyone to know that the Detroit area office of R. L. Deppmann moved during the month …
What are ECM Pumps & ECM Smart Pumps
Last week, I defined ECM motors and how they differ from standard PSC and induction motors. We recently had a customer call who was very …
What is an ECM Pump? – Part 1
ECM pumps and Smart pumps are marketing terms being thrown around to indicate a highly efficient variable speed pump that saves more money than you …
Specifications for Thermometers, Gauges, and Test Plugs
This week’s R L Deppmann Monday Morning Minutes wraps up the series on gauges and thermometers with a short review of pressure/temperature test ports and …
Thermometers for Hydronic HVAC and Plumbing Systems
Temperature is important in heating and cooling systems. Today’s Building Management Systems (BMS) may monitor key areas of interest in the hydronic piping systems. Many …
Michigan Rolls ASHRAE 90.1-2013 into the 2015 Michigan Energy Code
The 2015 Michigan Energy Code is changing with an expected effective date of September 20, 2017. The long expected changes to the code were filed …
Pressure Gauge Accessories for Hydronic HVAC and Plumbing Systems
Sometimes when we add fries and other sides to a food order, the price of lunch and the calorie count can double. Let’s make sure …