HOFFMAN HOFFMAN, INC.

P.O. Box 77258Greensboro, NC 27417-7258www.hoffman-hoffman.com

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GREENSBORO, NC(336) 292-8777FAX: (336) 292-6822

ASHEVILLE, NC(828) 296-0111FAX: (828) 296-0077

CHARLOTTE, NC(704) 364-4700FAX: (704) 365-3427

RALEIGH, NC(919) 781-8011FAX: (919) 787-6019

WILMINGTON, NC(910) 791-4775FAX: (910) 791-4213

COLUMBIA, SC(803) 765-9360FAX: (803) 256-7728

GREENVILLE, SC(864) 676-1888FAX: (864) 676-9009

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PAIDGreensboro,

NCPermit #17

connecting engineers, equipment & technology

The McQuay website contains useful informa-tion on seismic certification. HVAC systems are essential building components that need to maintain operation immediately after a seismic event. Building codes requires owners and consulting engineers to select seismic compli-ant HVAC equipment in seismic sensitive areas. Many types of McQuay equipment have been rigorously tested for compliance to seismic qualifications from the following organizations: International Building Code (IBC) standards developed by the International Code Council and the California Office of Statewide Health Planning and Development (OSHPD). Video of the shake table tests for McQuay and Daikin McQuay water-cooled centrifugal chillers can be seen on McQuay’s website at www.mcquay.com/McQuay/Other/SeismicCertification.

HOFFMAN HOFFMAN, INC.connecting engineers, equipment & technology

a t e c h n i c a l b u l l e t i n a n d n e w s u p d a t e

since 1947 september/october 2011

inside this issueISSUE 58 NC•SC•TN•VA

www.hoffman-hoffman.com

www.hbtech.biz

Offering Building Automation & Systems Integration since 1987

Training Opportunities

ASHRAEData Centers

Greenheck Exhaust Systems

DuctSox Fabric Duct

HBTEnergy Use

To help consumers make better informed deci-sions and encourage efficiency, some U.S. states and cities are starting to require commercials buildings measure and disclose their energy us-age. The new rules will cause building owners to make efficiency upgrades that will save

energy thus creating new jobs also. The specific utility costs for a building will not be disclosed, but rather the building’s relative efficiency. August 1, 2011 was the deadline for 16,000 large buildings in New York City to report how much energy they used in the past year or face quarterly fines of $500. For more information on this topic, scan this tag and read the article by Wendy Koch in USA Today or go to www.usatoday.com.

HOFFMAN HOFFMAN, INC.

Seismic Certification

Energy Use Disclosure for U.S. Cities, States

Hoffman Building Technologies is the Controls division of Hoffman & Hoffman, Inc. Today, over one thousand buildings in the Carolinas and Virginia utilize our control systems and technology. Call 800-332-8992 to find out how one of our Certified Energy Managers can help your building use less energy and run more efficiently.

An H-vintage, SWP Self-Contained air con-ditioning system is an ideal solution for jobs where energy efficiency, reliability, indoor air quality and acoustics are top priorities. In ad-dition to providing scroll compressors, optional water economizers and cleanable shell and tube condensers, H-vintage systems offer a number of new features.

• Earth-friendly R-410A refrigerant units with an energy efficiency ratio (EER) up to 15.9• Excellent acoustics utilizing plenum fan, acoustical discharge plenum, internal isolation and heavy-duty construction• Valuable (Vision™) attributes like low leakage rates of 1%, 2” double-wall R13 foam panels (optional heavy fiberglass available), hinged access doors and gasketed frame/panel construction• Modular construction – easy assembly and disassembly for units up to 130 tons utilizing patented (Vision™) splice collar design for easy connectivity of unit sections• Better indoor air quality with 4” MERV 8, 11, 13 and 14 filters – offered with (or without) 2” or 4” pre-filter option• Economical, integrated (or stand-alone) MicroTech® III controls system with advanced features, provides easy incorporation into most building automation systems (BAS)

Scroll Compressors• Up to eight – for quiet and efficient operation• Custom selections tailored to specific customer needs• High EERs for low operating costsWaterside Economizer• Effectively uses low cooling tower water temperatures to offload compressor operation• Airside economizer available as neededFactory-Installed Variable Frequency Drive (VFD)• Manages fan speed for VAV control• Dramatically reduces energy costs• Reduces fan noiseCustom Designed Acoustical Discharge Plenum• Multiple plenum heights• Multiple duct opening locations and size options• Available 2” foam panel or 2”, 1.5lb density fiber glass, perforated steel liner to reduce noise

Shell and Tube Condensers• Mechanically cleanable• Optional 450 psig water working pressure

Contact your local Hoffman & Hoffman representative for more details on McQuay products and go to www.mcquay.com.

Equipment

Centrifugal single compressor chiller, includes centrifugal Templifier™ water heaters

Centrifugal dual compressor chiller

Magnitude™ magnetic bearing compressor chiller

Vision™ indoor air handler

Skyline™ outdoor air handlers and rooftop air handlers

RoofPak™ Applied Rooftop Systems

AAF™-HermanNelson Unit Ventilators

Models

WSC, TSC

WDC, WCC

WMC, WME

CAH, CAC

OAH, OAC, RAH, RDS, RAR

RDT, RPS, RCS, RFS, RPR

AV, AR/ER/GR, AZ, AE

IBC Certified

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OSHPD Pre-approved

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McQuay Equipment Available with Seismic Compliance

Daikin McQuay SWP Self-Contained Air Conditioning Systems 12-130 Tons

Ensuring SafetyGreenheck Vektors are designed to provide a high-velocity plume that displaces the laboratory effluent high above the roof, reducing the possibility of contamination of the building’s interior, exterior and surrounding neighborhood.

Easy to Install and MaintainGreenheck Vektor systems are designed to be fast and easy to install. Maintenance is safe and easy with Vektors because all critical access components such as motors, bearings and dampers are easily acces-sible without disassembling the entire system.

Validated PerformanceVektor system designs undergo state-of-the-art computational fluid dynamics and performance analysis at Greenheck’s industry-leading test facilities. All meet ANSI Z9.5 and ASHRAE guidelines and are tested in accordance to AMCA 210, 260 and 300 standards.

Vektor-H Ideal for use in school or hospital laboratory applica-tions, Greenheck’s Vektor-H is a self-contained and cost-effective solution that is superior to field built-up fan and stack assemblies. The Vektor-H uses a belt-driven tubular centrifugal fan with an efficient nozzle design to safely propel fumes away from the building. Fan housings include an easy access design that allows for ease of maintenance to interior fan components. All Vektor-H systems are designed to withstand 125 mph wind loads without the use of guy wires, and are avail-

able as single-, double- or triple-fan systems.

Vektor-MD The Vektor-MD uses an inline mixed flow fan to quietly and efficiently exhaust fumes and odors up and above the research facility. The high plume dilution nozzle and windband entrain ambient air to assist in the dilution of the laboratory exhaust effluent and maximize plume rise. The Vektor-MD is available in belt or direct drive. Both utilize a bifurcated housing design that allows safe, easy access to all the drive components. Vektor-

MD systems have a small installed footprint, requiring minimal roof space. They can be applied in a wide variety of configurations including single, double, triple or quad assemblies, and can be pack-aged with Vektor energy recovery systems.

Vektor-CD Utilizing a centrifugal blower, the Vektor-CD is ideal for systems requiring hori-zontal exhausts or systems with extreme pressures (in excess of 14 inches wg). The efficient backward inclined wheels help to reduce energy consumption while maintaining low sound levels. Vektor-CD also includes the high plume dilution nozzle and windband to entrain ambi-

ent air which assists in diluting the laboratory exhaust effluent and maximizes the plume rise. Vektor-CD models are available in belt drive and can be configured as single fan systems, multiple parallel fan systems or opposed fan systems.

All Vektor blowers and bypass air plenums are constructed of heavy gauge, welded steel or aluminum, and coated with LabCoat™ – an electrostatically applied two-part corrosion resistant polyester resin and zinc rich primer as standard. Lifting lugs and guards are manu-factured with coated stainless or galvaneal steel for added corrosion resistance. All systems include design features for fan service with-out exposing personnel to contaminated exhaust. LabCoat provides excellent chemical resistance even in severe corrosive applications and has UV inhibitors to ensure long life while maintaining a clean, aesthetic appearance.

Vektor-CD and MD Air Entrainment and DilutionLaboratory exhaust is drawn into the Vektor fan, mixed with ambient air and discharged at high velocity.

For more information of Greenheck Vektor products contact your local Hoffman & Hoffman representa-tive and visit www.greenheck.com.

Choices for Laboratory Exhaust SystemsFor High-Plume or High-Plume Dilution

Iowa State Proves Fabric Duct is More Efficient than Metal!

McQuay Training Once you have made the investment in efficient, flexible HVAC equipment, taking care of your investment should be a top priority. McQuay International offers the following training classes to learn first-hand, from the manufacturer, what it takes to get the most out of your new mechanical systems. McQuay International has been approved as an Authorized Provider by the International Association for Continuing Education and Training (IACET). Go to www.mcquay/training.com for more details.

Date Class Location

October 4 – 7 WMC Magnetic Bearing Staunton, VA Centrifugal Chiller Maintenance and Operation

December 5 – 16 Centrifugal Chiller Theory Staunton, VA and Repair

December 5 – 16 Centrifugal Chiller Theory Staunton, VA and Repair

2011 Training Opportunities

Professional Development Seminars Hoffman & Hoffman, Inc. is an approved sponsor of continuing professional compe-tency activities for professional engineers and registered land surveyors for the State of North Carolina. Upon course completion, each participant may receive professional development hours (PDH).

Upcoming Professional Development Seminars include:

Featured Manufacturer: Greenheck Evapco September 20, 2011 Chesapeake, VA October 18, 2011 Raleigh, NCSeptember 21, 2011 Charlotte, NC October 19, 2011 Greensboro, NC September 22, 2011 Columbia, SC October 20, 2011 Greenville, SC

*Dates and locations are subject to change. Please contact your Hoffman & Hoffman salesperson for more details. Daikin Training in Greensboro, NC

Daikin AC conducts various training courses at the Hoffman & Hoffman training center in Greensboro, NC. Go to www.daikinac.com/commercial/ to register for a training course today or contact your Hoffman & Hoffman salesperson.

Upcoming courses include:

September 27, 2011 1-Day VRV Install & CommissioningSeptember 28-29, 2011 2-Day Advanced VRV Service & TroubleshootingOctober 4, 2011 RA/SkyAir Install & CommissioningOctober 18, 2011 1-Day VRV Install & CommissioningNovember 8, 2011 1-Day VRV Install & CommissioningNovember 9-10, 2011 2-Day Advanced VRV Service & Troubleshooting

Price Industries Training Price Engineering Training is a four-day program for designers, engineers and architects. It provides a hands-on learning experience in North America’s most advanced air distribution training facilities. Continuing education credits are available.

Price Technical Center (Atlanta) September 19-23, 2011 October 24-28, 2011

Price Technical Center West (Phoenix)October 8-12, 2011December 5-9, 2011

comments & suggestionsFor comments or suggestions on this newsletter, please write or call Rusty Hoffman

at (336) 252-1700, rusty.hoffman@hoffman-hoffman.com or P.O. Box 77258, Greensboro, NC 27417-7258.

DuctSox once again proves itself as the leader for fabric dispersion systems!

DuctSox recently worked with Iowa State Uni-versity to demonstrate that fabric is more efficient than metal. You may have already seen the article in The HVAC&R Industry Newsletter, on Green-

BuildingPro.com, or some other publication.

Here’s an excerpt:

“Mechanical engineers always suspected that fabric HVAC ductwork is more energy efficient than its metal duct counterpart, but now three members of the Iowa State University’s Mechanical Engineer-ing Department have proven an overwhelming 24.5-percent ef-

ficiency differential. The 10-month-long study, “Thermal Comparison Between Ceiling Diffusers and Fabric Ductwork Diffusers for Green Buildings” proved fabric duct heats rooms faster and more uniformly to satisfy temperature set points versus metal duct/diffusers, which results in reduced mechanical equipment runtime, thus saving energy in the process...”

To read the rest of this article and view a copy of the entire study go to www.greenbuildingpro.com.

For more information on how DuctSox products can help your building be more energy efficient, contact your local Hoffman & Hoffman representative and visit www.ductsox.com.

ATLANTA – Three new courses related to data center efficiency and ASHRAE standards on energy efficiency and high-performance build-ing design are part of the 12 online professional development courses being offered this fall by ASHRAE through the ASHRAE Learning Institute (ALI).

ALI courses provide professional development through in-depth information that is timely, practical and advanced beyond a funda-mental level. The online courses allow attendees to log in to learn from anywhere with an Internet connection. Course participants earn continuing education credits for each seminar completed. Courses are instructor-led, drawing upon professional knowledge of leading practitioners.

The courses are: • Basics of High-Performance Building Design, Sept. 19• Advanced High-Performance Building Design, Sept. 21• Fundamental Requirements of Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality, Sept. 26• Complying with Standard 90.1-2010: HVAC/Mechanical, Energy

Standard for Buildings Except Low-Rise Residential Buildings, Sept. 29• Complying with Standard 90.1-2010: Envelope/Lighting, Oct. 3• Healthcare Facilities: Best Practice Design, Oct. 31• Healthcare Facilities: Best Practice Applications, Nov. 2• Evaluating the Performance of LEED®-Certified Buildings, Nov. 7• Project Management for Improved IAQ, Nov. 9• Data Center Energy Efficiency, Part 1, Oct. 10, and Part 2, Oct. 12• Using Standard 90.1 to Meet LEED Requirements, Part 1, Oct. 17, and Part 2, Oct. 19• Implementing Standard 189.1, Standard for the Design of High- Performance, Green Buildings Except Low-Rise Residential Buildings, Part 1, Oct. 24, and Part 2, Oct. 26

For registration costs and to register, visit www.ashrae.org/onlinecourses. Site licenses are available to organizations that will be having five or more seminar participants. For more information, e-mail edu@ashrae.org or call 678-539-1146.

Blower StyleStack Style

Minimum Flow (Per Fan)

Maximum Flow (Per Fan)

Maximum ESP

Vektor-H

Inline CentrifugalHigh Plume Nozzle

270 cfm {459 m3/hr)}

24,000 cfm{40,776 m3/hr}

Up to 3.5 in. wg{875 Pa}

Vektor-MD

Inline Mixed FlowHigh Plume Dilution Nozzle

1,500 cfm{2,549 m3/hr}

80,000 cfm {135,921 m3/hr}

Up to 8 in. wg{2000 Pa}

Vektor-CD

CentrifugalHigh Plume Dilution Nozzle

500 cfm{850 m3/hr}

140,000 cfm{237,862 m3/hr}

Up to 14 in. wg{3500 Pa}

Data Centers, Standards 90.1 and 189.1 Featured in ASHRAE Fall Educational Courses