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 …
Pressure Gauges for HVAC & Plumbing Systems
Today hydronic pump control, pressure independent balance, ASHRAE 90.1 reset requirements, dual return boiler systems, and other highly technical design options take our attention on …
Expansion Joints for HVAC Steam Systems
Steel expands when you heat it. This is a fact of nature and shouldn’t be overlooked when designing the HVAC steam piping system. One way …
How to Pick an HVAC Centrifugal Pump Part 11: Best Practices for Safety and Performance
As we conclude this series on how to select a centrifugal pump for your hydronic applications, we want to leave you with the following “best …
How to Pick a HVAC Centrifugal Pump Part 10: HVAC Pump using a Variable Frequency Drive
The last R L Deppmann Monday Morning Minutes described the recommended limitations when over speeding a HVAC pump with a Variable Frequency Drive (VFD). Today …