The Guide to Meeting
the Challenges of
$120 ($98 ASHRAE Member)
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ASHRAE Design Guide for
The Guide to Meeting the Challenges of Tall Buildings
Tall buildings present unique and formidable challenges to architects and engineers
because of their size, location in major urban areas, and the multiple, complex occupancies
they often contain. ASHRAE Design Guide for Tall, Supertall, and Megatall Building Systems
is a unique reference for owners; architects; and mechanical, structural, and electrical
engineers as well as other specialized consultants involved in designing systems for these
Expanded since ASHRAE’s previous guide on the topic in 2004, this new design guide
covers not only tall buildings (taller than 300 ft [91m]) but now also addresses supertall
(taller than 984 ft [300 m]) and megatall (taller than 1968 ft [600 m]) buildings, with a
broadened scope and updated content that reflects current standards and industry practices.
This guide not only focuses on the efforts of designers of the HVAC systems but also
addresses the importance of the design team and their collective efforts and concerns that
are the critical elements in determining the ultimate solutions to the project needs of a tall
building. This guide addresses design issues for tall commercial buildings, which are very
often mixed use, with low-level retail, office floors, residential floors, and hotel floors.
Major sections cover the following subjects:
• Architectural design
• Façade systems
• Climate data
• Indoor air quality (IAQ) and thermal comfort
• HVAC systems
• Electrical system interfaces
• Intelligent buildings and controls
• Water distribution
• Plumbing systems
• Energy modeling and authentication
• Vertical transportation
• Life safety
• Needs of residential occupancies
Also included are appendices with examples of stack effect and wind pressure for four
representative climates, energy analysis examples, and HVAC design criteria and a systems
description for a multiple-tenant office building.
ASHRAE Design Guide for Tall, Supertall, and Megatall Building Systems is accompanied
by online content, which can be found at www.ashrae.org/tallbuildings.
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Since the introduction of the energy
saving initiatives in 2011, MGM
Facilities Management has implemented numerous energy saving and
sustainability projects, resulting in a
27% energy savings and a cumulative carbon emission reduction of
22,875 tonnes (Figure 5).
It may be largely invisible to the millions of vacationers who visit MGM
MACAU each year. But, the prop-erty's corporate sustainability vision
means owners seek to achieve continuous energy efficiency improvements
behind the scenes as vacationers
enjoy their stay at the resort.
ABOUT THE AUTHOR
Peter Chan is executive director of engineering at MGM MACAU, NAPE, Macau.•
and thermal comfort and drives preventive maintenance of the plants.
Waste Water Recycling. MGM
Facilities Management has intro-
duced waste water reuse by treat-
ing and recycling waste water from
cooling tower blowdowns and AHU
condensate for toilet flushing in
The primary only system and the
heat pump projects offered the
most significant savings with a
verified payback of only 1. 9 years.
Capital cost and savings shown in
Figure 4 are the actual project pricing and verified savings, respectively.
The cost savings of the primary only
system and heat pump project are
calculated using actual before and
after electricity consumption metered
data, and the cost is calculated by
multiplying the electricity consumption by the average electricity rate,
obtained by averaging the electricity
unit rate of the last 12 months.
More recently, the monitoring based
commissioning (MBCx) platform is used
by Facilities Management to maintain
persistent, premium service quality and
ensure satisfying guest experiences.