Download - SustainbleIndustries Green Building Rushing
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Historic Renovations
RAE ANNE RUSHING, P.E. LEED APPresident & CEO, Rushing
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What is Sustainability?
Unless history is a vagary of nonsense, theremust be a counterpart to the immense power
of man to destroy,
There must be a voice that says NO to man, avoice not vague, faint and inward, like qualms
of conscience, but equal in spiritual might to
mans power to destroy.- Abraham Joshua Heschel
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Challenge
Intervention in any historic building is acomplex challenge
Extra care must be taken with a building thatis a cultural icon, focal point or symbol of theCity.
Seattle Asian Art Museum
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Challenge
A healthy respect for the building and site
can be maintained while addressing the
Energy and water saving challenges of thepresent and future.
Pike Place MarketNot so healthy?
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Historic Renovation
Uniqueparameters Distinctive solutions
Creativity appliedFlexibility appliedKnowledge of older systems required
Unique Lessons and Rewards
Seattles Union Station
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Energy Modeling
eQUEST IES-VE Trane TRACE EnergyPro EnergyPlus Ecotect Excel*Not approved for Federal Tax Credit
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Energy Modeling
Landmark designation conflicts with codes:
Work-arounds in energy modeling (radiant,water/water heat pump, natural ventilation,advanced heat recovery, variable refrigerant
flow, undefloor air delivery)
Negotiations with various officials (code,landmark boards)
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Challenges
Poor energy performance but shells cant bemodified
Restrictive floor to floor heights ACT Theater: New ducts were run vertically with
minimal horizontal.
Creative back of house routing
Minimal or no as-built records
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Challenges
Dont forget to include these first costs whenevaluating Energy Conservation Measures
Undersized electrical service: Seaboard: New transformer vault cost was prohibitive so
hydronic heat and air-side economizer was utilizedthroughout this Residential, Office, and Retail Project.
PPM: Successfully negotiated new transformer at lowercost in an existing right of way in lieu of undergroundbeneath First Ave saving major expense and tenantrelocations. Businesses able to remain open.
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Challenges
Maintaining the aesthetic and character ofhistoric buildings while incorporating energy-
saving measures PPM: No closure is allowed. Occupancy and
operations to be undisturbed.
Codes: Change of use to residential requires fullenergy code compliance. Many projects strugglewith the cost of replacing all the single paneglazing in this scenario. (Smith Tower)
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Seaboard Building and Dexter Horton
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Seattle Asian Art Museum (SAAM)
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ACT Theater
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Union Station
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ZymoGenetics
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Pike Place Market
Occupancies
Retail
Restaurants Low income
housing Senior housing Office Banquet Center
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Pike Place Market Airside Economizer
Challenge:
Airside Economizer is Required by Seattle EnergyCode 1433
Issues: Historic space severely constrains new outside air
ductwork options.
New louvers are not allowed in the historic facades.Solution:
A customized alternative compliance pathway wasnegotiated as allowed by SEC Section 1132.2Exception 2
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Pike Place Market Airside Economizer
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Pike Place Market Airside Economizer
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Pike Place Market Airside Economizer
Negotiated Alternative Compliance Pathway
Total outdoor airflow provides 50% airside economizer 2006 SEC has no efficiency standard for water to water
heat pumps. EERs and COPs will be a minumum of 25%better than an alternative efficiency standard (ISOStandard 13256-2)
High efficiency gas boilers are provided Heat recovery from large water cooled refrigeration
systems utilizing water to water heat pumps.
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Pike Place Market Airside Economizer
A SPREADSHEET ANALYSIS was used for energycomparison with code baseline.
(NOTE: FULL SIMULATION WAS NOT CODEREQUIRED)
Results show the proposed approach consumesapproximately
2% less energy in cooling than code efficientequipment with 100% airside economizer woulduse.
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Pike Place Market Window Replacement
Challenge:
Should existing single pane wood sash windows
be retained or replaced?
Option 1: Refurbish and Retain Existing Windows Option 2: Metal Clad Wood Replacement Windows Option 3: Single Pane Wood Replacement Windows
A SPREADSHEET ANALYSIS was used forEnergy Comparison and LCCA
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Pike Place Market Window Replacement
First Cost Summary:
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Pike Place Market Window Replacement
30 Year Net Present Value:
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Pike Place Market Window Replacement
Annual Energy Cost:
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Pike Place Market Window Replacement
Maintenance:
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Pike Place Market Window Replacement
LEED NC V2.2 CERTIFICATION IMPACT:
Mandatory Criteria: 7% energy cost savings relative to an ASHRAE 90.1 2004
baseline building
(2 points in the existing building criteria)
Savings Provided by Window Replacement: 12% energy cost savings relative to an ASHRAE 90.1 2004
baseline building for use of metal clad replacement windows.
0% energy cost savings relative to an ASHRAE 90.1 2004baseline building for use of single pane wood replacement
windows.
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Pike Place Market Window Replacement
WHAT IF WE LOOKED AT EMBEDDED
ENERGY?
New Windows: Resource extraction and processing Factory fabrication energy Shipping energy
Removal and landfill energy
Refurbish Existing: Maintenance resources such as water for cleaning during
refurbishment
Worker energy consumption Energy to mobilize on an annual basis? Single pane glazing replacement
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Assessment
Make sure payback assessments take into
account all first costs:
New transformer vault for new loads Envelope improvements Alternate fuels-gas, steam Renewable sources
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Rushing HQ TI
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Access Issues