BUILDING ENERGY - Spring 2018 - 20

OBSTRUCTED ROOF.

TYPICAL ROOF LAYOUT FOR MULTIFAMILY BUILDING, INCLUDING NECESSARY
SETBACKS FOR FIRE ACCESS, MECHANICAL EQUIPMENT ACCESS, AND SHADING
FROM BULKHEADS. FIRE ACCESS IS BASED ON FDNY GUIDELINES.
CREDIT: ERIC WALLACE

OPTIMIZED ROOF.

Some simple structural and electrical engineering
considerations should be included in the building
design to optimize for solar. Including 5-10 psf of
dead load in the structural calculations can go a
long way in justifying the addition of a solar array
in the future. Electrically, providing a dedicated
breaker space in the main switchgear at the opposite
end of the bus from the main breaker, a dedicated
conduit run from the roof to the electrical room and
interior wall space in a rooftop mechanical room
for mounting the inverters will all greatly simplify
the design and installation, reduce the costs and
improve the aesthetics of the system.
As U.S. citizens and local governments take the
reins in the country's commitment to a clean energy
future, solutions such as high-density solar are
important industry advancements that provide more
accessible and widespread opportunity for change.
The urban environment provides a number of unique
challenges to the development of solar, but a few key
considerations in the design phase of new buildings as
well as the adoption of intelligent local policy can help
overcome these obstacles.
ABOUT THE AUTHORS
Eric Wallace is an Energy Engineer at Steven Winter
Associates, providing consulting, design and inspection
services for solar energy as well as a variety of programs,
including Energy Star Multifamily High Rise, Enterprise
Green Communities, New York Energy Conservation Code
and ASHRAE Standard 90.1. Prior to joining SWA, Eric
spent four years designing commercial-scale solar power
systems. He holds a B.S. in Mechanical Engineering
from California Polytechnic State University in San Luis
Obispo and an M.S. in Mechanical Engineering from the
BUSINESS MEMBER
University of Colorado Boulder.

OPTIMIZED ROOF LAYOUT FOR MULTIFAMILY BUILDING, WITH BULKHEADS
SHIFTED TO NORTH SIDE OF ROOF AND ALL MECHANICAL EQUIPMENT UNITIZED
OR MOVED OFF OF MAIN ROOF.
CREDIT: ERIC WALLACE

need for many central exhaust fans on a rooftop. This
not only frees up the specific space taken by the fans,
but also the access pathways required for
equipment maintenance.
Any large equipment that must be placed on the
roof and any other rooftop obstructions, namely
stairwell and elevator bulkheads, should be placed
as far to the north end of the roof as possible. Clear,
unobstructed sun access to the south of the array is
essential for systems in the northern hemisphere.
When obstructions cannot be placed to the far north
end, they should be placed strategically to allow for the
largest single area for an array. The simplest and least
expensive racking system for a solar array is a ballasted
system, which benefits immensely from a simple,
rectangular array. These arrays allow the outer modules
to effectively shield the inner modules from high wind
loads, reducing the overall weight of the array as well as
the cost of the system.
20 * BUILDINGENERGY VOL. 37 NO. 1 | SPRING 2018

Alex Mirabile is a Marketing Coordinator at Steven
Winter Associates (SWA) and a recent graduate
from the University of New Hampshire. His
responsibilities at SWA span a wide range of the
company's marketing efforts including social media
management, event planning, brand maintenance,
and writing for external publications. Alex graduated
with a B.S. in Environmental Conservation and
Sustainability and served as a member of the New
Hampshire Sustainable Energy Association while
BUSINESS MEMBER
at UNH.
ABOUT THE PEER REVIEWER
Steven Strong is the President of Solar Design
Associates, Inc., of Harvard, MA, an Engineering
and Architectural firm dedicated to environmentally
responsive buildings and the engineering and
integration of renewable energy systems to power
them. Over the past 4 decades, he's earned the
firm an international reputation for the pioneering
integration of renewable energy systems with
environmentally responsive building design,
completing projects in Europe, Asia, Africa, the
Middle East, Canada, the Caribbean, Latin America
and across the US from Maine
BUSINESS MEMBER
to Hawaii.



Table of Contents for the Digital Edition of BUILDING ENERGY - Spring 2018

From the Executive Director
From the Board Chair
Product Choices for High-Performing Building: Materials Matter
Designing Solar for High-Density Areas
High Performance Building Valuation Techniques
Starting with the End in Mind: Enhanced Turnover for Efficient Building Operations
Behavior Based Strategies and Organizational Change in Commercial & Public Buildings: The Human Component of Energy Efficiency
Commercial HVAC Retrofits That Work
Stretch Codes Emerge as a High Impact Strategy For Energy Savings
Scale it Up: Monitoring-Based Demand-Side Operations for NYC Agencies
The Retrofit Revolution
Index to Advertisers
BUILDING ENERGY - Spring 2018 - intro
BUILDING ENERGY - Spring 2018 - cover1
BUILDING ENERGY - Spring 2018 - cover2
BUILDING ENERGY - Spring 2018 - 3
BUILDING ENERGY - Spring 2018 - 4
BUILDING ENERGY - Spring 2018 - 5
BUILDING ENERGY - Spring 2018 - From the Executive Director
BUILDING ENERGY - Spring 2018 - 7
BUILDING ENERGY - Spring 2018 - 8
BUILDING ENERGY - Spring 2018 - 9
BUILDING ENERGY - Spring 2018 - From the Board Chair
BUILDING ENERGY - Spring 2018 - 11
BUILDING ENERGY - Spring 2018 - Product Choices for High-Performing Building: Materials Matter
BUILDING ENERGY - Spring 2018 - 13
BUILDING ENERGY - Spring 2018 - 14
BUILDING ENERGY - Spring 2018 - 15
BUILDING ENERGY - Spring 2018 - 16
BUILDING ENERGY - Spring 2018 - 17
BUILDING ENERGY - Spring 2018 - Designing Solar for High-Density Areas
BUILDING ENERGY - Spring 2018 - 19
BUILDING ENERGY - Spring 2018 - 20
BUILDING ENERGY - Spring 2018 - 21
BUILDING ENERGY - Spring 2018 - High Performance Building Valuation Techniques
BUILDING ENERGY - Spring 2018 - 23
BUILDING ENERGY - Spring 2018 - 24
BUILDING ENERGY - Spring 2018 - 25
BUILDING ENERGY - Spring 2018 - Starting with the End in Mind: Enhanced Turnover for Efficient Building Operations
BUILDING ENERGY - Spring 2018 - 27
BUILDING ENERGY - Spring 2018 - 28
BUILDING ENERGY - Spring 2018 - 29
BUILDING ENERGY - Spring 2018 - 30
BUILDING ENERGY - Spring 2018 - Behavior Based Strategies and Organizational Change in Commercial & Public Buildings: The Human Component of Energy Efficiency
BUILDING ENERGY - Spring 2018 - 32
BUILDING ENERGY - Spring 2018 - 33
BUILDING ENERGY - Spring 2018 - 34
BUILDING ENERGY - Spring 2018 - 35
BUILDING ENERGY - Spring 2018 - Commercial HVAC Retrofits That Work
BUILDING ENERGY - Spring 2018 - 37
BUILDING ENERGY - Spring 2018 - 38
BUILDING ENERGY - Spring 2018 - 39
BUILDING ENERGY - Spring 2018 - 40
BUILDING ENERGY - Spring 2018 - Stretch Codes Emerge as a High Impact Strategy For Energy Savings
BUILDING ENERGY - Spring 2018 - 42
BUILDING ENERGY - Spring 2018 - 43
BUILDING ENERGY - Spring 2018 - 44
BUILDING ENERGY - Spring 2018 - Scale it Up: Monitoring-Based Demand-Side Operations for NYC Agencies
BUILDING ENERGY - Spring 2018 - 46
BUILDING ENERGY - Spring 2018 - 47
BUILDING ENERGY - Spring 2018 - 48
BUILDING ENERGY - Spring 2018 - 49
BUILDING ENERGY - Spring 2018 - 50
BUILDING ENERGY - Spring 2018 - The Retrofit Revolution
BUILDING ENERGY - Spring 2018 - insert1
BUILDING ENERGY - Spring 2018 - insert2
BUILDING ENERGY - Spring 2018 - 52
BUILDING ENERGY - Spring 2018 - 53
BUILDING ENERGY - Spring 2018 - 54
BUILDING ENERGY - Spring 2018 - 55
BUILDING ENERGY - Spring 2018 - 56
BUILDING ENERGY - Spring 2018 - 57
BUILDING ENERGY - Spring 2018 - 58
BUILDING ENERGY - Spring 2018 - 59
BUILDING ENERGY - Spring 2018 - Index to Advertisers
BUILDING ENERGY - Spring 2018 - 61
BUILDING ENERGY - Spring 2018 - 62
BUILDING ENERGY - Spring 2018 - cover3
BUILDING ENERGY - Spring 2018 - cover4
http://www.nxtbook.com/naylor/ENEB/ENEB0118
http://www.nxtbook.com/naylor/ENEB/ENEB0217
http://www.nxtbook.com/naylor/ENEB/ENEB0117
http://www.nxtbook.com/naylor/ENEB/ENEB0216
http://www.nxtbook.com/naylor/ENEB/ENEB0116
http://www.nxtbook.com/naylor/ENEB/ENEB0215
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