Posts Categorized: Air Handling Units

Project Snapshot: Custom Field Erected AHU for University of Texas

Project Name:   University of Texas Tower Air Handling Unit Replacement Location:   Austin, Texas Project type, building type:   System overhaul, school (college, university) Mechanical Engineer:   EEA Consulting Engineers Equipment:  Custom Field Erected Air Handling Manufacturer:  Air Enterprises (AEI) Project duration:  1.5 years Project completion date:   April 30, 2007 Engineering challenges Location and space constraints for the… Read more »

Composite Wheel Technology | A Good Idea

Composite material design has been the hot topic in new construction.  We recently visited one of our manufacturers.  They shared a new fan wheel design from Ziehl-Abegg.  This is a design that will begin to take center stage in the HVAC design industry.   Composite Fan wheels are a great idea.  These are key advantages… Read more »

Ask Rick: Air Handling Units | Single point power connection?

Q.  We are in a disagreement over specification language.  In your opinion what does a “Single Point Power Connection” include?  Thanks,   Boston Engineer.   Good Question.  This comes up all the time. Depending on the application and circumstances “Single Point Power Connection” is defined in multiple ways.  Typically there are assumptions made, often times wrong,… Read more »

Custom Air Handling Units | Coil Selection Guidelines

I have included a collection of notes that we have pulled together over the years that guide us through typical coil selections for custom air handling units.  Coils Basics: Header Orientation –  Supply low leaving, return high entering Coil Hand –  Face the entering air side of the coil to determine its hand connection. With… Read more »

Air Handling Unit Design | A More Efficient Direct Drive Plenum Fan

We are using significantly more and more direct drive fans these days.  Annexair,  a leader Energy-Efficient Air Handling Systems, standardizes on direct drive fans for all their units.  They are more efficient, quieter, require less maintenance and last longer (see – 4Reasons Why we choose Direct Drive Fans).  The efficiencies of these fans were a… Read more »