Building Operating Management September 2011 - FacilitiesNet

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92 buildingoperatingmanagement SEPTEMBER <strong>2011</strong> SHOWCASE: HVAC Know What to Look for When Upgrading HVAC by casey laughman, managing editor Upgrading an HVAC system represents a major investment of time and money, so it’s not something to enter into without proper planning. What that plan involves isn’t always clear at the beginning. Just as every building is different, so is every HVAC system. And while replacing one piece may work out just fine, it also could simply be the first in a series of dominoes. “It may be that you replace a component and it will make it even more inefficient than it was before. You have to look at the whole system and look at what really needs to be done for the money to give you the best return on your investment,” says Jon Cogdill, senior property manager, Hines. Cogdill, and other experts agree on one point: While there’s no such thing as a standard HVAC upgrade, there are some aspects of the process that always apply. Begin at the Beginning If you’re looking into upgrading your HVAC system because equipment is reaching the end of its life or because the building needs better service, it can be an easier sell than simply looking to become more energy efficient. “Are you trying to solve a problem? Or are you trying to make it more efficient?” says Clayton Ulrich, senior vice president, engineering services, Hines. “It’s clearly very hard to justify what we would loosely call an HVAC upgrade in an existing building if there isn’t a problem.” If you can combine efficiency with another compelling reason to replace part or all of an HVAC system, it becomes a much easier sell. A big part of that sell, however, is knowing exactly what you need. Say you’re replacing a chiller. Because chillers can easily last 30 years or more, the odds are good that the needs of the building and its occupants have changed since it was installed. “The first thing is to consider the asset you’re talking about,” says Tony Bamonte, vice president and regional property manager, Liberty Property Trust. “I don’t suggest you just replace units with a like kind.” Cogdill says he can attest to that from personal experience. Hines has been working on an HVAC upgrade of Two Shell Plaza in Houston, a more d a b c ❯❯a. AIRXCHANGE fi eld-assembled energy recovery wheel cassettes are cut into halves or quarters and marked for reassembly to fi t through standard doorways and allow for installation in limited-access areas. Wheels recycle up to 80 percent of heating and cooling energy contained in exhaust air. Wheel segments can be removed for cleaning. AIRXCHANGE: CIRCLE #255 ❯❯b. FRIEDRICH packaged terminal air conditioner features indoor and outdoor motors, three-speed fan and universal heater/ power cord. Tangential blower wheel has surface area almost fi ve times larger than previous fans. Fits standard 42-inch sleeves without baffl e kit. Separate heating and cooling limits. Unit supports centralized desk control and is compatible with energy management systems. FRIEDRICH: CIRCLE #227 ❯❯c. GREENHECK rooftop ventilation unit conditions and controls any mixture of outdoor and return air. The unit has 2-inch double-wall construction and direct-drive plenum fans. Indirect gas furnace, hot water or electric heating options; packaged or split direct-expansion or chilled water cooling options. Optional energy wheel. Capacity up to 9,500 cfm. GREENHECK: CIRCLE #228 ❯❯d. AEGIS SGR protection ring channels electrical current away from motor bearings. Available in standard sizes to fi t AC motors from 1 to 1,500 HP with shaft diameters from 8 mm to 153 mm. Larger sizes are available for shafts with greater than 6-inch diameter. Screw-on mounting brackets require no machining. AEGIS: CIRCLE #229
The Power of Innovation Introducing the only commercial size instantaneous water heater above 250,000 BTU/HR. Once again, AERCO leads the way in commercial water heating technology with the introduction of Innovation, its newest line of premium water heaters. Featuring a tankless design, advanced condensing/ modulating technology, and a scaleresistant heat exchanger, Innovation delivers performance and economic advantages to any system. Here’s why Innovation stands out from the crowd: • Available in three sizes: 600, 800 and 1060 MBH • Up to 99% efficiency • High reliability • Low NOx • Small footprint FREE INFO: Circle 460 • +/-4° temperature control, thanks to feed-forward sensing and unmatched turndown • Reduced standby and cycling losses To learn more about the Innovation family of water heaters, visit www.aerco.com/innovation5 AERCO International, Inc. 800.526.0288 • email info@aerco.com
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