R. L. Deppmann News and Information

Calculating Natural and Mechanical Loads: Humidification Basics Part 4

How do we determine how much moisture should be added to the air for a given application? In other words, how do we calculate the

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Bell & Gossett Suction Diffuser Plus Product of the Year

Suction Diffuser Plus receives Bronze Award in annual reader’s choice program    For the sixth time since 2010, Xylem Inc., a global water technology leader

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B&G Suction Diffuser Plus

Psychrometrics Made Easy: Humidification Basics Part 3

What is psychrometrics? It’s a big and intimidating word to be sure and the common definition, the study of the physical and thermodynamic properties of gas-vapor

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rooftop

How to Determine Impeller Size with Shut-off Head

Here is a quick way to determine impeller size from the No Flow point on the pump curve. Tools needed: 1) Pump curve. Select the

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pump tag with fields labeled

Humidification Basics Part 2: Mastering Humidification Terms

Humidification is one of those areas where the terminology can often be a roadblock to understanding the topic. After all, we’re not all meteorologists! Since

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why humidify?

Humidification Basics: Why We Humidify in Building Design

Ever hear the phrase, “It’s not the heat, it’s the humidity”? It’s all about humidification in this Monday morning Minute series. In the commercial HVAC

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Ultrasorb MP with 4 insulated tubes on 6-inch centers

Parallel Pumping: 2-Position Control Valves on Multiple Cooling Towers (Part 5)

Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions

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Parallel pumping sketch - ft. img

Parallel Pumping with Unequal Condensers (Part 4)

Over the last few weeks our Monday Morning Minutes posts have looked at pumping issues with parallel, equal-sized condensers and pumps. This week we will look

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Graphic 1

Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)

Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for

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LPD Y strainer

Selecting the Proper Glycol Concentration for Closed-Loop HVAC Systems

There are two basic types of glycol protection available for your closed-loop HVAC system: “burst protection” and “freeze protection.” Burst protection is sufficient if the

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