An engineer asked a question about using a variable speed pump for air temperature control in lieu of a two-way control valve. What are the …
Constant Speed 2-Way Control vs. Variable Speed Pumps for Heating and Cooling Coils (Part 1)
An engineer asked a question about using variable speed pumps for air temperature control in lieu of a two-way control valve. The question clearly makes you …
Hydronic Primary-Secondary Piping – How Important are the Two Close Tees?
Every year we get questions about the importance of primary-secondary piping rules around boilers and coils. Recently, I also received a call about using a …
Making Smart Water Heater Choices
Introducing the New R. L. Deppmann Plumbing Website Looking to learn more about the differences in commercial and institutional water heater types and manufacturers? We …
Steam Water Heaters – What Steam Pressure Do You Use
Indirect steam water heaters for domestic water use are often the solution engineers will choose in institutional or industrial buildings. They require no venting. They …
Steam Water Heaters – Storage Tank, Buffer Tank, or No Tank
The engineer contacts us for assistance in selecting an indirect steam source water heater. Do you need a lot of storage, a small amount of …
Solving Minimum Flow in a Primary Variable System (Part 3)
The engineer is aware of the importance of minimum flow to the pumps in hydronic systems. The R. L. Deppmann Monday Morning Minutes Part 1 …
Minimum Flow in Variable Speed Pumps for Building Hydronic HVAC Systems (Part 2)
The HVAC engineer designing a hydronic system understands the need to protect the circulating pumps from a dead head or no flow condition. This week, …
Minimum Flow in Variable Speed Pumps for Building Hydronic HVAC Systems (Part 1)
Every week a question comes into R. L. Deppmann about the minimum flow rate through hydronic pumps and the best way to achieve it. Today, …
Gas Fired Water Heaters – Multiple Units and Future Capacity
When determining the size and number of water heaters to meet the customer’s needs, there are many factors to consider. How many water heaters do …