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Building Operating Management September 2011 - FacilitiesNet

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92<br />

buildingoperatingmanagement<br />

SEPTEMBER <strong>2011</strong><br />

SHOWCASE: HVAC<br />

Know What to Look for<br />

When Upgrading HVAC<br />

by casey laughman, managing editor<br />

Upgrading an HVAC system represents<br />

a major investment of time<br />

and money, so it’s not something to enter<br />

into without proper planning. What<br />

that plan involves isn’t always clear at<br />

the beginning. Just as every building is<br />

different, so is every HVAC system. And<br />

while replacing one piece may work out<br />

just fine, it also could simply be the first<br />

in a series of dominoes.<br />

“It may be that you replace a component<br />

and it will make it even more<br />

inefficient than it was before. You have<br />

to look at the whole system and look<br />

at what really needs to be done for the<br />

money to give you the best return on<br />

your investment,” says Jon Cogdill, senior<br />

property manager, Hines.<br />

Cogdill, and other experts agree on<br />

one point: While there’s no such thing<br />

as a standard HVAC upgrade, there<br />

are some aspects of the process that<br />

always apply.<br />

Begin at the Beginning<br />

If you’re looking into upgrading<br />

your HVAC system because equipment<br />

is reaching the end of its life or because<br />

the building needs better service, it can<br />

be an easier sell than simply looking to<br />

become more energy efficient.<br />

“Are you trying to solve a problem?<br />

Or are you trying to make it more efficient?”<br />

says Clayton Ulrich, senior<br />

vice president, engineering services,<br />

Hines. “It’s clearly very hard to justify<br />

what we would loosely call an HVAC<br />

upgrade in an existing building if there<br />

isn’t a problem.”<br />

If you can combine efficiency with<br />

another compelling reason to replace<br />

part or all of an HVAC system, it becomes<br />

a much easier sell. A big part of<br />

that sell, however, is knowing exactly<br />

what you need.<br />

Say you’re replacing a chiller. Because<br />

chillers can easily last 30 years or<br />

more, the odds are good that the needs<br />

of the building and its occupants have<br />

changed since it was installed.<br />

“The first thing is to consider the<br />

asset you’re talking about,” says Tony<br />

Bamonte, vice president and regional<br />

property manager, Liberty Property<br />

Trust. “I don’t suggest you just replace<br />

units with a like kind.”<br />

Cogdill says he can attest to that<br />

from personal experience. Hines has<br />

been working on an HVAC upgrade<br />

of Two Shell Plaza in Houston, a more<br />

d<br />

a<br />

b<br />

c<br />

❯❯a. AIRXCHANGE fi eld-assembled energy recovery wheel<br />

cassettes are cut into halves or quarters and marked for reassembly<br />

to fi t through standard doorways and allow for installation<br />

in limited-access areas. Wheels recycle up to 80 percent of heating<br />

and cooling energy contained in exhaust air. Wheel segments can<br />

be removed for cleaning. AIRXCHANGE: CIRCLE #255<br />

❯❯b. FRIEDRICH packaged terminal air conditioner features<br />

indoor and outdoor motors, three-speed fan and universal heater/<br />

power cord. Tangential blower wheel has surface area almost<br />

fi ve times larger than previous fans. Fits standard 42-inch sleeves<br />

without baffl e kit. Separate heating and cooling limits. Unit supports<br />

centralized desk control and is compatible with energy management<br />

systems. FRIEDRICH: CIRCLE #227<br />

❯❯c. GREENHECK rooftop ventilation unit conditions and<br />

controls any mixture of outdoor and return air. The unit has 2-inch<br />

double-wall construction and direct-drive plenum fans. Indirect gas<br />

furnace, hot water or electric heating options; packaged or split<br />

direct-expansion or chilled water cooling options. Optional energy<br />

wheel. Capacity up to 9,500 cfm. GREENHECK: CIRCLE #228<br />

❯❯d. AEGIS SGR protection ring channels electrical current<br />

away from motor bearings. Available in standard sizes to fi t AC<br />

motors from 1 to 1,500 HP with shaft diameters from 8 mm to 153<br />

mm. Larger sizes are available for shafts with greater than 6-inch<br />

diameter. Screw-on mounting brackets require no machining.<br />

AEGIS: CIRCLE #229

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