Air Zone International - Under Floor Airconditioning
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Site 26 Battery Park

2.1 Million SF
Consulting Eng.: Cosentini
Sales Rep.: SRS Enterprises

Environmental Air Tower Space Return Air is Mixed in Air Stream in Mech Room where ½ of the return air stream is bypassed and the other ½ is distributed through the cooling coil

The Situation:

Tishman Speyer, the developer for this project, and the owner, a large financial institution, wanted a green building, but also one that was economical to build and operate. Cosentini Associates, the MEP consulting engineer on the project, was tasked with designing a cost effective Under Floor Air Distribution (UFAD) system that consumed low amounts of energy and reduced the per floor mechanical room footprint. The challenge: how could the mechanical shafts be downsized, the underfloor distribution be effective, the floor by floor AHUs have quiet performance, and plenum heat gain and underfloor ductwork be avoided?

Air Zone International was ready to embrace the challenge.

Our Solution:

Designing a building to better ASHRAE 90.1: 2004 Baseline Building Performance by almost 30% is no easy task –especially when that building is over 800 feet tall. According to Tishman Speyer, the Air Zone Environmental Air Tower design alone contributed 25% towards the building’s overall operating cost savings. Why are Air Zone International’s products and under floor system designs more energy efficient than other solutions? Our Direct Drive Plenum Fans with High Efficient Motors use up to 6% less energy than “standard” offerings and floor-by-floor environmental air towers with Chilled Water (CW) coils allow for a reduction in the primary outside air shafts and eliminate the need for a large air handling unit on each floor, resulting in less overall horsepower and equipment space.

Effective Air Side Distribution is probably the most important factor to a successful UFAD project, with quiet performance and the control of undesirable air leakage a close second and third. Constructing a column unit with CW Coils to meet rigorous NC 40 sound requirements in an independent lab at the maximum CFM was a challenge—but Air Zone was up to it.

Just one square foot of additional rentable space can equal $600 – or more in prime real estate locations- when the building is sold. Due to the different floor sizes in this project, our units ranged in capacity from 7,500 CFM to 15,000 CFM. With our patented feature rollout assembly and compact footprint, valuable space is preserved.

The Results:

Air Zone Column Units successfully passed NC 40 sound levels when no other manufacturer’s equipment could pass the requirements.

Our Column Units are economical, especially when compared to the costs they avoid. Air Zone International Environmental Air Units are typically $2.00-$3.00 per/cfm depending on unit size. This compares favorably to other custom air unit manufacturers’ offerings with far less project experience. But also, look at the whole picture cost: by using column units, one saves on real estate and avoids under floor ductwork—an often expensive and complicated proposition.

Air Zone International manufactures custom air units to save space, save energy, and save money. Call today to see what Air Zone International can build for you.



The Brains of the Operation
In the July Issue of Engineered Systems Magazine, Julie DeNardis with ESD talks about the HSBC project in Chicago which utilized Air Zone’s Mixed Flow Column Units.

Lights Out Houston
Air Zone was proud to once again be an organizing sponsor for Lights Out Houston 2009. Over 111 Million SF of building property managers and tenants pledged to forever turn off unnecessary lighting – visit for more information.

Air Zone Tower Units Go in one of the world’s most energy efficient skyscrapers.
National Geographic takes you behind the scenes of One Bryant Park.

3 New Downtown Office Towers in Houston and Denver are awarded to Air Zone International.
Each of these green projects features our custom air handling units for overhead distribution.

Air Zone teams with Tate in joint marketing initiative.
An initiative that will offer quiet, compact and energy efficient supply air to underfloor service distribution systems.

Hess Explores Discovery Tower
A likely candidate considers entire 30-stories, of which Air Zone International manufactured the air units.

Architecture 2030 Mission
Immediate action required to reverse buildings' emissions.

© 2012, Air Zone International

5220 Ted Street   |   Houston, Texas 77040   |   office (713) 460-4040   |   fax (713) 460-4050