Current Stage of Green Building Development

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• Current Stage of Green Building Development
• Sustainable Housing in Florida
• An Overview
• Subrato Chandra
• Program Director, Florida Solar Energy Center of
  the University of Central Florida

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3 high profile programs

• Building America
• Florida Green Building Coalition
• USGBC- LEED for Homes Pilot
• Hundreds of Green homes are being built annually
  in Florida by these three programs

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Building America Goals

• Perform cost shared R D and provide technical
  assistance to builders that result in thousands
  of high performance homes saving 30 - 50 or
  greater in whole house energy use while enhancing
  comfort, indoor air quality and durability
• www.buildingamerica.gov

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BAIHP Overview

• One of six and the only university based prime
  contractor to US DOE Building America
• Initiated in September, 1999 Recompeted 2006
• Team comprises FSEC (lead), UCFIE, WSU, ODOE,
  UT-Austin SOA, Fl-Hero, Calcs-Plus, RESNET over
  50 builders, home manufacturers and suppliers
• BAIHP works in all housing sectors, focusing on
  factory built housing.

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BAIHP is saving over 22,000,000/yr in 135,000
homes produced since Sept99
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Whole House Approach for Production Builders

• Example GW Robinson Builders, Gainesville, FL
• Lead Florida H.E.R.O. (Ken Fonorow)

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Systems Engineering Approach

• Understand builder desire
• GW Wanted To Build Greenest, Healthiest Homes
• Provide customized solution including plan
  analysis, HVAC design, inspecting, testing and
  rating every home
• Progressively increase energy efficiency over
  time
• Consistently deliver homes that save gt30 on a
  whole house BA benchmark basis
• Currently 20 homes/month being delivered with
  this level of performance from GW and other BAIHP
  builders

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General Specs

• SEER 14 Air conditioner
• 93 AFUE Gas Furnace
• EF.84 Tankless gas water heater
• 0.28 SHGC, U.39 Vinyl Low-e windows
• R-30 with Radiant barrier vented attic
• 2 x 4 Frame construction w/R-13 cellulose
• Wide Overhangs on Patio doors and windows
• Moisture Management Techniques, Low VOC paints

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Typical AHU in Florida Garages

• Causes Energy Waste
• Can draw in pollutants and car exhausts
• Mold because of exterior condensation

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AHU in conditioned space

• Review Plans and Recommend Making AHU Closet Part
  of Conditioned Space
• Isolated from Garage
• Improves Everything - Health, Safety, Durability,
  Comfort and Energy Efficiency
• Also Results in 15 sq. ft. More Conditioned
  Space
• 1,500 Appraised Value
• 500 In First Cost

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Air Intakes and Ventilation

• Provide For
• Filtered Air Intake
• Combustion Air Inlets And Outlets
• 30cfm Outside Air Only When AHU runs
• Positive house
• Pressurization

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Right-Sized A/C and Sealed Ducts

• Right-Size A/C Using Manual J
• Size and Layout Ducts Using Manual D
• Short, Well Supported Duct Runs
• Duct Leakage 4 to Outside

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Inspect, Test, Rate

• Perform Periodic Site Inspections, Tests And Rate
  Each Home (HERS 89 91)
• Provide Feedback To Builder
• Qualifies for 2,000 federal tax credit

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Results in Happy Builder and DOE!
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Monitored Cooling Energy Savings

• Hoak Residence, Orlando FL
• Cambridge Homes, Orlando FL
• Notsobig showhouse, Orlando FL
• New Generation Homes, Ft. Myers FL
• ORNL ZEH4, Lenoir City TN

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First , the limits.

• Lakeland Study
• Zero Energy Home
• Monitored 1998-2002
• Saved 75 Cooling Energy Compared To Control
• Lakeland FL
• 2428 Sq. Ft.
• SEER 14.4/ SEER10
• Lead Danny Parker

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The Hoak Residence, Orlando FL

• 4,200 sq. ft, unvented attic, occup. by family of
  4
• 13 SEER 2sp 4zone a/c HERS 91

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Ducts in conditioned space in unvented attic
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Bonus room resulting from unvented attic
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Heat Pump Water Heater

• Provides Hot water
• Integrated with house cooling system to take
  advantage of free cooling and dehumidification
  provided by the HPWH

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65 savings
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Cambridge Homes model, Orlando

• 2674 sq. ft.
• SEER 13
• No zoning
• Two a/c units
• 62.2 vent
• Dehumidifier
• HERS 87

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40 savings
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Notsobig showhouse model, Orlando

• 2660 sq. ft.
• SEER 16/2sp
• No zoning
• Two a/c units
• No vent
• Cool Roof
• HERS 94

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40 savings
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New Gen. Homes by Kingon Occupied

• 2481 sq. ft.
• SEER 15
• No zoning
• 5 ton (oversized)
• 32 cfm vnt (runt.)
• Leaky ducts (6)
• Vented attic
• HERS 88
• Ft. Myers, FL

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20 savings
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ORNL ZEH4 Occupied (family of 3)

• 1,200 sq. ft.
• SEER 17
• HERS 91
• 62.2 vent
• Earth contact

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70 savings
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Conclusions so far

• 40 - 70 savings in heating, cooling, water
  heating and lighting over code minimum housing
  are possible and have been repeatedly
  demonstrated by the Building America program
• Appliance and plug load savings are much more
  difficult requires home owner cooperation
• FGBC and USGBC programs next

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Florida Green Building Coalition, Inc.
To provide a statewide green building
program with environmental and economic benefits.

• Non-profit, membership based organization
• Encourage green building in Florida
• Voluntary standards

www.FloridaGreenBuilding.org
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Florida Green Building Coalition, Inc.
FSEC Involvement

• Member of founding board of directors
• Chaired development of home, land development,
  and local government standards
• Oversee the certification processes
• Provide technical assistance, training, and
  education

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Florida Green Building Coalition, Inc.
Statistics

• gt 300 individual and
  organizational members
• gt 600 homes certified
• 6 developments certified comprising gt 17,000
  acres
• 5 local governments seeking certification

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Incentives for Green Buildings

• Gainesville Green Building Program
• ½ off building permit fee
• Free fast track permitting
• Marketing for builders
• Sarasota Green Building Program
• Same as Gainesville
• Incentives for staff to get green training
• Miami-Dade County
• Encourages green buildings

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FSEC was selected as one of 11 regional program
providers and oversees this national residential
green standard in Florida during the pilot.
USGBC
PILOT
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What is the LEED System?
Leadership in Energy and Environmental
Design A leading-edge system
for certifying the greenest performing buildings
in the world
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Status of Pilot

• National
• 142 Pilot Builders
• 752 Registered Projects
• 24 Certified Projects
• 17 certified, 4 silver, 2 gold, 1 platinum
• Florida
• 7 registered projects
• None certified

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• Expect a full national release of LEED for Homes
  in Spring 2007
• FSEC hopes to foster a single, combined rating
  system for Florida that
• Adds additional tiers to current FGBC system.
• Engages FGBC network of members.
• Engages FGBC network of raters.
• Brings national recognition through USGBC

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Thank You