William Shakespeare may not have known anything about hydronic engineering, but a small part of his play, Romeo and Juliet, could be renamed Flexible Connectors …
Hydronic Expansion Joints (Part 2): It’s All About the Guides
Expansion joints in hydronic systems are used when the natural flexibility of the pipe will not handle the calculated movement caused by thermal expansion. Those …
Hydronic Expansion Joints (Part 1)
I was recently asked twice in one week, “What is the difference between an expansion joint and a flexible connector in hydronic systems?” Piping flexible …
Break The Tie! Preso Ellipse Flow Meters for HVAC Hydronic Mains
The balance contractor often has a tough job when completing the flow balance of an HVAC hydronic heating or cooling system. Today’s engineering documents tend …
Balancing HVAC Hydronic Systems Part 5: Pressure Independent Control Valve (PICV)
Air side terminal units have used pressure independent control valves for a long time. These valves, also called PICV, are still relatively new in hydronics. …
Variable Speed Pump Control & Automatic Balance Valves : Part 4
A few weeks ago in the R. L. Deppmann Monday Morning Minutes (MMM) part 3 of this series, we showed that direct return systems with …
Balancing HVAC Hydronic Systems Part 4: Automatic Flow Limiting
Last week, the R. L. Deppmann Monday Morning Minutes (MMM) showed the advantages and disadvantages of manual balance valves. Today, we continue with automatic balance …
Balancing HVAC Hydronic Systems Part 3: Flow Measurement Valves
The flow balance of a hydronic system is a critical component in the commissioning of an HVAC hydronic system. The common balance and flow measurement …
Balancing HVAC Hydronic Systems Part 2: Control Valves vs. Balance Valves
There are some engineers who challenge the use of balancing valves at all in hydronic systems. If the control valve throttles the flow to satisfy …
Balancing HVAC Hydronic Systems Part 1: Flow Tolerance
The flow tolerance of a hydronic system is a critical component in the commissioning of an HVAC hydronic system. Should the balance report match the …