Hydronic Balancing Part 12: Pressure Independent Control Valves

Hydronic Balancing Part 12:  Pressure Independent Control Valves

Designing, installing and balancing hydronic system became infinitely easier with the introduction of a handy little gadget called a pressure independent control valve or “PIC” valve.  These valves, which first hit the market nearly two decades ago, have revolutionized hydronic balancing....

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Hydronic Balancing Part 11: Variable Flow Pumping

Hydronic Balancing Part 11: Variable Flow Pumping

Throughout our Hydronic Balancing Series, we’ve been slowly and meticulously making our way to the more complex control systems that we see today.  We walked you through the steps of proportionate balancing a simple 3-zone system and taught you how to trim an impeller in accordance with ASHRAE 90.1.  Today, we’re going to see what happens when we add variable speed drives to the system. 

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Domestic Hot Water Recirculation Part 7: Balancing Systems with Multiple Risers

Ever have to wait 2 or 3 minutes (or longer) for hot water to arrive at the shower in a hotel room? If you know a little about plumbing design you may assume you’ve had the misfortune of choosing a hotel without a recirculation system. But chances are the hotel does have a recirculation system, it just isn’t properly balanced.
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