Humidification Basics Part 5: Calculating Humidification Loads for Economizer Cycle Systems

Humidification Basics Part 5:  Calculating Humidification Loads for Economizer Cycle Systems

Now that we’ve learned how to calculate a basic humidification load, we need to understand how to do the same when an economizer cycle is part of our design. 

Why is that so important? Because nearly every commercial building in the continental US is required (per DOE) to incorporate either an air- or water-side economizer. If your state hasn’t already incorporated the ruling into its commercial building code, it’s just a matter of time ...

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Humidification Basics Part 3: Psychrometrics Made Easy (Well….Sort of)

Humidification Basics Part 3:  Psychrometrics Made Easy (Well….Sort of)

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 mixtures, doesn’t make it much less so. But we’re going to break it down for you in a way that is both simple and practical with regard to HVAC and ...

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Air Management and Pressurization Part 5: Is It A Compression Tank or an Expansion Tank?

By Chad Edmondson

 As we bring our first series about air management in a hydronic system to a close, we’re going to revisit tanks – not what they do (we’ve already covered that) but what we call them.  Specifically, we want to address whether or not there is a difference between what some industry professionals call an “expansion tank” and what others call a “compression tank.” 

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Air Management and Pressurization Part 4: Expansion Tank Sizing

By Chad Edmonson

Properly sized expansion tanks (standard or bladder/diaphragm) are critical to a successful air management in a hydronic system.

Every expansion tank manufacturer has a written form that provides the steps and calculations for sizing an expansion tank.  Most, if not all, have developed software that does the work for you.  Bell & Gossett has a great one, ESP-Plus which can be downloaded here.  But regardless of whether you use software or charts and longhand calculations to size an expansion tank, there are a few pieces of information you’re going to have to have either way.  These key values are:

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