Green Building Design in CA
What is it?
How to do it?
Specifics to California?
Presented by: McParlane & Associates
Your Speakers for Today
Jorge Torres Coto
Sustainable Engineering Coordinator
McParlane & Associates, Inc.
[email protected]
Brought to you by
McParlane & Associates, Inc.
What is Green Building?
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Green or sustainable building is the practice of
creating healthier and more resource efficient
models of construction, renovation, operation,
maintenance and demolition.
(U.S. EPA)
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Design Team is RESOURCE MANAGER
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Energy (influent & effluent)
Water (influent & effluent)
Materials (influent & effluent)
Waste
Embodied energy
Etc.
Why Build Green?
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BECAUSE IT IS THE RIGHT THING TO DO!
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5% to 10% of the market is going green
20% to 30% increase per year in green building
marketplace (data from 2005 and 2006)
Decreased operating costs (10% approximately)
Increased ROI (2% investment may yield 20% LCC)
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The market’s growing
How to measure Green Buildings?
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National Guidelines
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Leadership for Energy and Environmental Design
(LEED)
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United States Green Building Council (USGBC)
Green Globes
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Green Building Initiative
Want to get certified?
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LEED Accredited Professional
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Certified Green Building
Engineer
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AEE (www.aeecenter.org)
BPI Certified Professional
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USGBC (www.usgbc.org)
BPI (www.bpi.org)
Certified Green Building
Professional
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Build it Green
(www.builditgreen.org)
Want to certify your building?
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Green Globes
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Straight forward approach.
Performance driven.
Big in Residential, catching on in Commercial.
Inexpensive.
LEED
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Tons of paperwork.
Mix of prescriptive and performance.
Wide acceptance.
Costly.
What works in California?
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Beware of all the promises
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We have two basic regions in CA:
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Northern CA (lots of rain)
Southern CA (little rain)
We have many regional climate zones
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The grass is not always greener on the other side
Coastal (mild & humid)
Mountain (dry with extremes)
Desert, etc.
The basics are easy in California
Location, Location, Location!!!
SAN DIEGO (13°F)
SAN FRANCISCO (14°F)
Location, Location, Location!!!
SAN BERNARDINO (39°F)
REDDING (30°F)
Location, Location, Location!!!
MOJAVE (35°F)
DEATH VALLEY (28°F)
The Big Picture!
http://www.placemakers.com/smartcode/3000-00-Clean_SmartCodev8.0.pdf
http://www.smartcodecomplete.com
What do we have to offer?
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PASSIVE SYSTEMS
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Slower reaction time
Good for flat daily range
Rooms constant loads:
 Occupants
 Lighting
 Equipment
 Solar
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ACTIVE SYSTEMS
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Faster reaction time
Higher degree of daily range
Rooms with varying loads:
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Meeting / Conference rooms
Cycling equipment
Gimmes and No-Brainers
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High Efficiency Anything
– HVAC equipment
– Glazing
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LSG=VLT/SHGC
Insulation
Plumbing Fixtures
Lighting (controls)
Motors
Etc.
What works in California?
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EXTERNAL SOLAR SHADING
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NoCAL & SoCAL
Reduce heat gain and glare by
adding fins above windows or
glass.
Up to 35% energy savings on
cooling load.
New construction or renovation
Ideal for buildings that don’t
allow for high performance
glazing and/or south facing
glass.
What works in California?
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XERISCAPE
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NoCAL & SoCAL
Landscaping with smart plant
choices and grouping
according to water needs and
sun and moisture conditions.
Reduction in water use by up
to 60%.
New construction and
renovation.
Easy to achieve in southwest
with native plants, since they
require little water.
http://pubs.caes.uga.edu/caespubs/pubcd/B1073.htm
What works in California?
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GEOTHERMAL
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NoCAL & SoCAL
Utilizes thermal stability of
ground to act as a heat source
in winter and heat sink in
summer.
Energy can be reduced 25% to
50% for heating and cooling.
New construction and
renovation.
Hard to find the right ground
condition and location.
What works in California?
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GARDEN ROOFS
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NoCAL & SoCAL
Vegetated roofs.
Can reduce heating and
cooling by at least 5%.
New construction and
renovation.
Can double the life of a roof.
Can reduce storm water runoff
by 50%.
What works in California?
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VEGETATIVE WIND BREAKS
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NoCAL & SoCAL
Control of dust and wind by
planting sturdy (low water
consuming) trees/plants that
will stand-up to brutal weather.
Can reduce winter heating cost
by 40%, summer cooling by
50%.
New construction and
renovation.
Make sure they don’t interfere
with line of sight or passive
solar systems.
What works in California?
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CROSS VENTILATION
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NoCAL & SoCAL
Utilizes pressure differentials to
move air through a building,
with air flowing through
windows, doorways, across
rooms, etc.
Savings range from 5 to 20%.
New construction. Renovation
may be difficult due to window
location, orientation, etc.
Works best when maximum
building depth is 49 ft. or less
and air source is clean.
http://www.wbdg.org/ccb/DOD/UFC/ufc_3_440_06n.pdf
What works in California?
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NIGHT COOLING
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NoCAL & SoCAL
Flushing cool air at night
through a building.
Savings range from 5 to 17%.
New construction. Renovation
may be difficult due to window
location, orientation, etc.
Works best in climates with
diurnal swing of 20°F or higher
and building with traditional
hour of occupancy.
What works in California?
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DAYLIGHTING
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NoCAL & SoCAL
Use natural light.
Lighting energy can be
cut 75% to 80%.
New construction or
renovation (orientation
may be obstacle).
Challenging in very sunny
climates due to glare.
http://btech.lbl.gov/pub/designguide/dlg.pdf
What works in California?
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MIXED-MODE VENTILATION
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NoCAL & SoCAL
Combination of natural and
mechanical ventilation and
cooling.
Savings from 5% to 20%.
New construction or renovation.
Ideal for older, naturally
ventilated buildings with
increased internal loads due to
higher occupancy or equipment
loads.
http://repositories.cdlib.org/cgi/viewcontent.cgi?article=1091&context=cedr/cbe
What works in California?
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PASSIVE STACK VENTILATION
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NoCAL & SoCAL
Combination of cross ventilation,
rising warm air, and venturi effect
to circulate air through a building
without fans.
Savings from 5% to 20%.
New construction or renovation
(depends on existing floor plate).
Works best in smaller buildings,
4-stories or less.
What works in California?
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PASSIVE SOLAR HEATING
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SOUTHERN CALIFORNIA
Integrated design of walls,
windows and building materials
to provide solar collection and
heat storage/distribution.
5% up to 75% reduction of
heating requirements.
New construction
Best in small buildings. High
solar heat gain (0.55 SHGC or
more) low-e coatings in cold
climate.
http://www.wbdg.org/ccb/AF/AFH/pshbk_v1.pdf
http://www.wbdg.org/ccb/DOD/UFC/ufc_3_440_03n.pdf
http://www.greenbuilder.com/sourcebook/PassSolGuide1-2.html
What works in California?
What works in California?
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EVAPORATIVE COOLING
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SOUTHERN CALIFORNIA
Utilizes water to extract heat
from airflow.
Can use only 10% of the
energy and air conditioner
would.
New construction and
renovation.
It can meet total cooling load.
Or be combined with air
conditioning for more extreme
loads.
http://www.energy.ca.gov/reports/2004-04-07_500-04-016_AT1.PDF
What works in California?
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SOLAR WATER HEATING
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SOUTHERN CALIFORNIA
Absorbs sunlight and transfers
it to the fluid to be utilized.
Can provide up to 80% of hot
water needs with minimal O&M
New construction or renovation
A sunny climate helps, but not
required.
http://www.wbdg.org/design/swheating.php
What works in California?
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WIND POWER
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SOUTHERN CALIFORNIA
Conversion of wind to
electricity
Saving depend on many
factors (type of turbine, on-site,
off-site, etc.)
New construction and
renovation.
Rural and/or flat locations are
best. Placing turbines near tall
buildings isn’t recommended.
What works in California?
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PHOTOVOLTAICS
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SOUTHERN CALIFORNIA
Conversion of sun to electricity
Savings depend on many
factors.
New construction and
renovation.
Payback and aesthetics are the
biggest obstacles.
http://www.wbdg.org/ccb/DOE/TECH/sand7023.pdf
What works in California?
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ENERGY RECOVERY
VENTILATION
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NORTHERN CALIFORNIA
Reclaiming of energy from
heated / cooled exhaust air that
is transferred to fresh air
coming into building.
Hard to calculate savings, but
paybacks range from months
to 3 years.
New construction and
renovation.
In mild climates the system fan
energy might be more than the
energy savings provided.
What works in California?
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RAINWATER HARVESTING
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NORTHERN CALIFORNIA
Collection and storage of rain
from roofs or other surface.
Possible savings of 40% water
usage. 10 to 15 yr payback.
New construction or
renovation.
Tall buildings will collect less
debris. Building 3-stories or
less may require screens, etc.
What to watch out for in California?
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DISPLACEMENT VENTILATION
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Utilizes buoyancy forces
(generated by people, lighting,
computers, etc.) to move
contaminants and heat from the
occupied zone to the
return/exhaust grilles.
Cooling energy savings of 30%
to 50%.
New construction or renovation.
Requires higher ceilings, best for
schools and open offices.
http://www.archenergy.com/ieq-k12/Public/Proj4_Deliverables/D4.2j1_AppGuidelinesforDV_2006-0522.doc
http://www.cibse.org/pdfs/David%20Butler.pdf
What to watch out for in California?
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RADIANT HEATING / COOLING
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Relies primarily on radiation. Hot
or cold water radiated through
floor or ceiling panels
Ventilation savings of 30% to
50%. Synergy with displacement
ventilation.
New construction or renovation.
Auxiliary air conditioning system
may be required. Higher cost
than conventional air system.
Requires tight energy efficient
envelope. Low internal and
external load gains.
Open Forum
 Questions?
Comments?
Complaints?
Praises?
THANK YOU
McParlane & Associates, Inc.
4619 Viewridge Avenue, Suite C
San Diego, CA 92071
858.277.9721
[email protected]