The Chicago Green Bungalow Initiative by the Chicago Department of - - PowerPoint PPT Presentation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

The Chicago Green Bungalow Initiative

by the Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Background Typical Bungalow Features Design, Energy & “Green”Features of each Bungalow Site Work Summary - Energy Savings, “Green” Products & Costs

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

To demonstrate creative methods of rehabbing bungalows that appeal to contemporary homeowners while preserving the historic character of the homes To demonstrate innovative energy efficient and environmentally sustainable techniques to renovate and landscape bungalows To encourage homeownership in the Chicago Lawn/Gage Park neighborhoods through visible neighborhood revitalization To strengthen the cohesiveness of the neighborhood through a variety of streetscape improvements To protect the market values in Chicago Lawn/Gage Park Goals of the Green Bungalow Initiative

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

City of Chicago Department of Environment City of Chicago Department of Housing U.S. Department of Housing and Urban Development Neighborhood Housing Services – Chicago Lawn NHS Redevelopment Corporation Southwest Home Equity Assurance Program Greater Southwest Development Corporation Historic Chicago Bungalow Association Partners in the Green Bungalow Initiative

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Timeline

1. Select demonstration bungalows. 2. Acquisition of bungalows. 3. Organize neighborhood improvements. 4. Document existing conditions. 5. AIA design charette for four programs and spatial design ideas. 6. Sustainable (green) design components identified and assigned. 7. Construction documents. 8. Construction. 9. Marketing, sales and public outreach. 10. Occupancy. 11. Monitor and evaluate performance.

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Five Keys to Rehabbing Green

• Know the house.
• Integrate methods and materials.
• Propose appropriate interventions.
• Know local suppliers and contractors.
• Monitor and learn.

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Sustainable Qualities Checklist

A. Site Design

• Emphasize on-site infiltration
• Minimize impacts to soils
• Design plantings to support sustainable goals
• Promote wise use of resources in design solutions
• Specify construction methods

B. Water Conservation

• Use low-flow fixtures
• Evaluate water savings via alternate pipe sizing
• Evaluate “speedy” hot water devices

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

C. Indoor Air Quality

• Assure environmental concerns (radon, lead paint, asbestos) are

fully addressed

• Eliminate volatile organic compounds
• Promote natural ventilation (simple, low cost)
• Select construction materials with minimal off-gassing
• Control humidity to eliminate mold and mildew growth
• Integrate and balance air-handling system
• Minimize potential for dust accumulation during and after

construction

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

D. Energy Use

• Optimize insulation choices – demonstrate many options
• Explore alternate energy sources, including active and passive solar
• Demonstrate compliance with proposed Chicago Energy Code
• Promote energy efficient lighting (fluorescent, Green Lights

Program)

• Use exclusively Energy Star appliances
• Use and Energy Star builder
• Perform HERS analysis
• Explore cooling ideas (blinds, passive cooling, shading)
• Promote a variety of controls (occupancy sensors, humidity

sensors, thermostats)

• Evaluate on-demand hot water heater
• Evaluate combination hot water heater/furnace
• Evaluate greywater storage and re-use
• Promote heat recovery wherever possible (water and air)

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

E. Resource Conservation

• Minimize waste throughout entire process, including design (review

electronic documents)

• Implement a construction/demolition debris management and

recycling program

• Utilize existing structure to the maximum
• Reuse as much of the existing components as possible
• Promote locally produced materials
• Use refurbished materials
• Use recycled/recyclable materials
• Promote occupant waste reduction via recycling and composting
• “Right-size” structural improvements

F. Miscellaneous Establish contractor and occupant education programs

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

R R-

• values

values

• 1” fiberglass

= 3.14

• 1” rock wool

= 3.70

• 1” spray foam

= 5.00

• 1” of brick

= 0.20

• 8” brick wall

= 1.60

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Basement Wall Insulation

Typical R-Values

• Poured Concrete (8” thick)

= 0.64

• Concrete Blocks

= 0.70 to 2.00

• Single Glazed Window

= 0.91

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Basic Ventilation System

• goal is to eliminate excess

moisture in the home

• bathrooms must have exhaust fans

vented to the outside

• kitchens must have exhaust fans

(no re-circulating type fans)

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Sealed Combustion Appliances

• improved air quality
• all combustion air drawn from
• utside
• high efficiency

Geothermal heating system Sealed combustion furnace Sealed combustion boiler Sealed combustion WH

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 1. T H E H A N D I C A P P E D A C C E S S I B L E H
• 1. T H E H A N D I C A P P E D A C C E S S I B L E H O M E

O M E

Retrofitted for wheel chair lift at side entrance First floor master suite and laundry room addition Wheel chair accessible kitchen and bathroom 1,400 ft2 (includes 500 ft2 addition) Selective demolition

6421 South Fairfield

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 1. T H E H A N D I C A P P E D A C C E S S I B L E H O M E

6421 South Fairfield

E n e r g y F e a t u r e s Geothermal closed loop system that uses the consistent temperature of the earth to provide heating, cooling and hot water for the home. Cellulose insulation in attic, foam insulation in sidewalls, and fiberglass batt insulation in basement Energy Star appliances Fluorescent lighting

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Selective demolition (“moderate rehab”)

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Spray foam insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Addition

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Studs for R13 batt insulation R5 foam board insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

R43 cellulose insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

R10 Basement Blanket R15 foundation wall insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Low-E replacement windows Packed pulley-well

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Geo-thermal furnace and water heater

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Geo-thermal system

• 3 ton cooling (EER = 16.0)
• 25,000 Btu/hr heating
• 3 wells @150’
• provides domestic hot water
• electric back-up for heating and

hot water

• existing ductwork reused

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Cork flooring in master bedroom Green Products

• cork flooring
• linoleum in hallway
• recycled content gypsum

board

• low VOC paints
• ACQ treated lumber

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 2. T H E H O M E O F F I C E
• 2. T H E H O M E O F F I C E

6423 South Fairfield

D e s i g n F e a t u r e s Home Office addition with separate entrance for clients Partially finished basement connects with home office and contains separate bathroom and kitchenette 1,300 ft2 (“gut rehab”) 262 ft2 addition

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 2. T H E H O M E O F F I C E

6423 South Fairfield

E n e r g y F e a t u r e s Combination heating system that works as a furnace and hot water heater Radiant floor heat in home

• ffice addition

Cellulose insulation in attic, rock wool insulation in sidewalls, and fiberglass batt insulation in basement Fluorescent lighting

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

New wall framing held-off brick by at least 1” provides a minimum wall cavity of 4-1/2”

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Spray rock wool insulation

• made from rocks
• R-value of 3.7/in

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Spray cellulose

• very similar to rock

wool

• made from recycled

newspaper

• similar R-value as

rock wool

• treated with fire

retardant

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Addition with full R10 (2”) slab insulation R10 slab edge insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Tubing for radiant floor system

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Lennox CompleteHeat System

• combination space and domestic

water heating

• direct vent sealed combustion
• 100,000 Btu/hr input
• 90% efficient
• can include an air conditioning

coil

• also serves radiant floor in

home office area

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Products

• natural slate tiles in home office
• linoleum in kitchen
• recycled content gypsum board
• low VOC paints & stains
• rubber flooring in finished part of

basement

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 3. T H E Y O U N G P R O F E S S I O N A L
• 3. T H E Y O U N G P R O F E S S I O N A L

6425 South Fairfield

D e s I g n F e a t u r e s Dormer addition contains spacious master suite, bathroom and sitting area Cathedral ceiling and open floor plan maximize space and light

1,644 ft2 with 500 ft2 second floor addition (“gut rehab”)

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 3. T H E Y O U N G P R O F E S S I O N A L

E n e r g y F e a t u r e s

6425 South Fairfield

Solar photovoltaic panels that generates dependable, safe, clean electricity High efficiency gas forced air furnace Rock wool insulation in sidewalls, fiberglass batt insulation in basement Fluorescent lighting

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

“Gut rehab”

• spray rock wool insulation
• n sidewalls
• R43 attic insulation
• 2” x 6” construction on

second floor with R21 batt insulation

• R10 basement wall

insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Furnace Rheem Classic 90 Plus

• 94% seasonal efficiency
• direct vent sealed combustion

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Solar Photovoltaic System Solar Photovoltaic System

• Spire system
• 2.4 kw system
• net metering
• no battery storage
• 8 – 75 watt panels

(21” x 48” x 16#’s)

• $39,049 installed

($16.27/watt)

• $10.43/watt after

state grant

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Products

• recycled plastic content carpet
• recycled content gypsum board
• low VOC paints & stains

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

AFTER BEFORE

• 4. T H E C L A S S I C B U N G A L O W
• 4. T H E C L A S S I C B U N G A L O W

6448 South Fairfield

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 4. T H E C L A S S I C B U N G A L O W
• 4. T H E C L A S S I C B U N G A L O W

6448 South Fairfield

D e s i g n F e a t u r e s Classically restored octagonal bungalow Original doors, trim and flooring add historic feel 1,268 ft2 with framed second floor for expansion

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• 4. T H E C L A S S I C B U N G A L O W

6448 South Fairfield

E n e r g y F e a t u r e s Sealed combustion boiler system at 88% efficiency Unico high velocity air conditioning Tankless water heater Recycled denim insulation in knee walls; cellulose insulation in ceiling; rigid foam insulation in basement Fluorescent lighting Storm windows with low-e glass

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• R10 (2”) extruded polystyrene

insulation

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Air leakage under the finished attic floor

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

1” rigid foam blocking used as an air barrier beneath knee wall

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• cotton insulation (R13) in knee walls
• R13 fiberglass batt insulation in roof

rafters

• R43 cellulose insulation in attic beyond

knee walls

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Boiler

• Burnham Revolution RV4
• 96,000 Btu/hr input
• 88% seasonal efficiency
• Direct vent sealed combustion

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Water Heater

• Bosch Aquastar AQ125B
• 117,000 Btu/hr
• Energy factor of .68

(standard water heater is .52)

• estimated 25% to 35%

water heater savings

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

• Unico high velocity air

conditioning system (SEER 12.0)

• 2” diameter flexible branch lines
• 2 ton system

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Products

• recycled content gypsum board
• low VOC paints & stains
• restored and repaired stained

glass windows, bookcase, fireplace mantel, light fixtures and door hardware

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Site Design/Landscaping

• Native plants

(low maintenance)

• Water conservation

(rain barrels, porous paving)

• Green roofs
• Swales and trench drains

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Roof

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Green Bungalow Evaluation

• Air Leakage
• Energy Savings
• “Green” Products
• Costs

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Blower Door Test (Air Leakage)

• How tight is the home
• Where are the air leaks

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Air leaks can be seen and felt

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Estimated Energy Savings vrs Actual Energy Savings

Estimated Energy Savings Actual Energy Savings 6421 S. Fairfield 68% 56%* 6423 S. Fairfield 51% 61% 6425 S. Fairfield 72% 69% 6448 S. Fairfield 38% 47%

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Energy Savings

Heating System Typical Actual Savings 6421 Geothermal $1,9131 $840 $1,073 6423 Combination $1,1492 $440 $709 6425 Furnace $1,2302 $381 $849 6448 Boiler $1,2092 $635 $574 1 – based on ComEd’s all electric rate of $0.0828/kwh for the first 400 kwh and $0.0373 for all kwh over 400.

2 – based on a gas heating cost of $0.60/therm

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Construction & Additional Energy Costs

Construction Cost Cost/ft2 Additional Energy Cost Cost/ft2 % Increase 6421 $192,958 $137.82 $13,100 $9.36 6.8% 6423 $220,425 $169.56 $5,180 $3.98 2.4% 6425 $175,200 $106.57 $4,575 $2.78 2.6% 6448 $131,153 $103.43 $3,390 $2.67 2.6%

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Cost Effectiveness

Annual Savings Payback Life Cycle Savings 6421 S. Fairfield $1,073 12.2 years 1.12 6423 S. Fairfield $709 7.3 years 2.08 6425 S. Fairfield $849 5.4 years 2.82 6448 S. Fairfield $574 5.9 years 2.57

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Cash Flow – 30 year Mortgage

30 years @ 6.5% = $6.32/$1,000 borrowed Heating System Monthly Savings Monthly Cost to Finance 30 yrs Net Cash Flow 6421 Geothermal $89 $82.79 + $6.21 6423 Combination $59 $32.74 + $26.26 6425 Furnace $71 $28.91 + $42.09 6448 Boiler $48 $21.42 + $26.58

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

15 years @ 5.5% = $8.17/$1,000 borrowed

Cash Flow – 15 year Mortgage

Heating System Monthly Savings Monthly Cost to Finance 15 yrs Net Cash Flow 6421 Geothermal $89 $107.03

• $18.03

6423 Combination $59 $42.32 + $16.68 6425 Furnace $71 $37.37 + $33.63 6448 Boiler $48 $27.70 + $20.30

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Total Cost Difference: $26,245 Total Building Square Footage: 5,612 ft2 Energy Efficient Cost/ft2: $4.68/ft2

Cost Difference to Include Energy Efficiency

Total Rehab Cost: $719,736 Rehab Cost/ft2: $128.25 ft2 Percent Cost Increase: 3.6%

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

1- compared to carpet 4 – compared to R13 fiberglass batts 2 – compared to vinyl tile 5 – compared to carpet @ $1.50 to 2.00 ft2 3 – compared to ceramic tile 6 – compared to vinyl siding

Item $/Unit Cork Flooring

1

$4.00 Linoleum

2

$6.00 Recyled Content Drywall $0.05 Recycled Rubber Floor

2

$3.50 Slate Flooring3 $1.25 Recycled Denim Insulation

4

$0.46 Low VOC Paint $4.50 Recycled Carpet5 $0.00 Cement Siding

6

$0.50 ACQ Treated Lumber TOTAL: 20,800 150 213 540 $5,684 $360 $0 $1,000 Required beginning January 1, 2004 80 gals 640 2,000 $1,040 $525 $267 $250 Resource Efficient Cost Differences Quantity (ft2) $520 $1,722 $ Difference 130 287

Green Bungalow Initiative – May 2004 Chicago Department of the Environment

Total Cost Difference: $5,684 Total Building Square Footage: 5,612 ft2 Resource Efficient Cost/ft2: $1.01/ft2

Cost Difference to Build “Green”

Total Rehab Cost: $719,736 Rehab Cost/ft2: $128.25 ft2 Percent Cost Increase: 0.79%