Sponsors:

ZeroEnergy Design Phone: 617.861.4793 Email: sh@zeroenergy.com Website: www.zeroenergy.com

GRAND PRIZE WINNER

ENTRY P122

Entry P122 – The Little Green Rhody

Narrative

We are pleased to submit a net-zero possible design for the competition. Our multidisciplinary teamincludes both a Rhode Island licensed architect and a residential mechanical designer, who is also aspecialist in energy modeling and a certified HERs rater.

The requested drawings and visualization capture our proposed design. We’ve adapted the samefootprint for the both the three and four bedroom plans. Our intent was to create a simple, aestheticallypleasing form that reflects the local vernacular of the neighborhood, and will be economical to constructand operate.

Life-Cycle Assessment Global Warming Potential

The Little Green Rhody relies on traditional wood frame construction paired with a modified concretefoundation system. For the wood frame, we elected for 2x4 studs at sixteen inches on center. The 2x4shave a minor savings relative to 2x6s at twenty-four inches on center, but the sixteen inch spacing ispreferable for the siding attachment – the strapping for the rainscreen needs to align with the studspacing, attaching the siding at twenty-four inches on center over strapping can lead to wavy siding, sosixteen inch spacing is preferred. When comparing 2x4s vs. 2x6 both at sixteen inches on center, we findthat the savings of 2-3% (a result of less wood and insulation) is preferable to the minor savings inoperational energy, when paired with our exterior insulation detail. There will be a savings in thematerial cost of the insulation and lumber. Care has been taken to minimize the framing factor (theamount of wood in the stud wall) by setting the overall dimensions of the home on a sixteen inch grid,setting the typical windows within the grid and aligning one side of each door to the grid.

The modified concrete foundation system we have used is engineered and manufactured by SuperiorWalls of America, though there may be comparable systems. When compared to a two foot by one footspread footing and eight inch cast in place concrete wall, the Superior Walls uses twenty-five less cubicyards of concrete. This is a result of less concrete in the walls system, as well as a rubble footing in placeof a poured concrete footing. The system has an ICC Code Approval Report, number ESR-1662. Theminor modification is that we’ve proposed to use expanded polystyrene (EPS) in place of extrudedpolystyrene (XPS) for reasons indicated above. As the insulation in non-structural, we do not feel thesubstitution should be problematic. This results in a savings of about three metric tons, or an 18%reduction in the overall foot print of the home. (Note we have accounted for the steel reinforcementthat is required by this system – see the Calculations page section at the end of this PDF.) The system isstructurally sounds and offers a continuous layer of concrete on the exterior of the system that will bebeneficial in creating a long-term waterproof foundation, relative to a discontinuous system likeconcrete blocks.

The proposed roof will be constructed of trusses at twenty-four inches on center. The use of a trussconstructed of 2x4 and 2x6 material will use less wood than a roof framed with traditional rafters and

ENTRY P122

ceiling joists. The truss also allows for a ‘raised heel’ at the top of wall so that the ceiling insulation is notdiminished at the pinch point where the roof meets the wall.

The insulation materials both above and below grade have been selected for their low global warmingpotential. We have excluded use of extruded polystyrene (XPS) from the project due to it’s high globalwarming potential. For below slab and the interior of the foundation wall, we’ve relied on Expandedpolystyrene (EPS.) Below the slab, we’ve used Type 9 EPS – it has a high compressive strength and issuitable for below grade applications. It’s also extruded in Smithfield, RI, a mere 7 miles from the site.

Operational Energy Use

The Little Green Rhody uses less than half the energy of an equivalent code-built home. The chart belowcompares operational cost for the four bedroom Little Green Rhody to a code-built baseline, as definedby the User Defined Reference Home (UDRH.) (Note this comparison does not account for PV.) The rawdata for this comparison can be found in the REM/Rate export included in this PDF.

In further support of the operational energy use of the Little Green Rhody, please reference thefollowing included in this PDF:

- a Home Energy Rating (HERs) Certificate for the Four Bedroom version of our design with a7.5kW PV array completed by our certified HERs rater

- REM/Rate Performance Factors for the Three Bedroom unit- REM/Rate Performance Factors for the Four Bedroom unit

The low operational energy use of the Little Green Rhody is largely attributed to it’s air tight and wellinsulated building envelope. Beyond minimizing heat loss, the heating load is further offset by placing amajority of the well-insulated, high solar heat gain windows on the south side of the home to capturethe sun’s free heat. Shading from the roof overhang and the wood trellis over the south-facing sliding

$3,651.85

$1,459.92

$0.00

$500.00

$1,000.00

$1,500.00

$2,000.00

$2,500.00

$3,000.00

$3,500.00

$4,000.00

$0.00

$500.00

$1,000.00

$1,500.00

$2,000.00

$2,500.00

$3,000.00

$3,500.00

$4,000.00

Code-Build Baseline Little Green Rhody(#P122) - 4 BR

Operational Energy Cost Comparison

Appliances

Lighting

Hot Water

Cooling

Heating

Total

ENTRY P122

door limit overheating during the warmer months. The following sub-sections further describes theattributes of the building envelope and mechanical systems.

Building Envelope

Foundation: The basement is continuously insulated – both on the foundation walls and below slab. Thisinsulation keeps the basement within the conditioned space – making it a similar temperature as therest of the house, with controlled humidity. These attributes, paired with the access from both the firstfloor and the back yard, will make it a great place for storage, mechanical equipment, and even playspace for the children.

Above Grade Walls: We’ve employed an external insulation strategy to allow for continuous insulationof the walls system. This wall system with perform significantly better than a wall that relies on cavityinsulation as the wood studs have great structural capacity but are a poor insulator when compared toinsulation. There are a couple of different types of rigid insulation that are suitable for an exteriorinsulation detail. We’ve proposed to use 3” of mineral wool insulation – it has a low global warmingpotential, is not a petroleum based product, and does not expand and contract like foam-basedinsulation products. This last point is particularly important because we’ve proposed just one layer ofthree inch thick mineral wool. If polyisocyanurate were to be substituted, for example, it would beimportant to install two layers with staggered seams as each panel is prone to expand and contract withtemperature creating small gaps between the panels, reducing overall performance and creating apotential for condensation on the sheathing. The images below, created in Therm, show a typical wallwith a post compared to the same wall with exterior insulation. Not only is the interior surfacetemperature of the exterior insulated wall warmer, but it’s condensing surface, the sheathing, iswarmed such that it will not reach the dew point and cause condensation. This will increase thedurability and longevity of the wall.

ENTRY P122

Roof: We’ve proposed a vented roof assembly with a truss structure and fourteen inches of loose filledcellulose at the attic ceiling. The vented assembly allows for the use of economical yet effectiveinsulation at the attic ceiling. The raised heal at the edge of the truss avoids the typical thermal bridgethat occurs at the roof – wall intersection. Though the attic space will not be suitable for storage ormechanical equipment, we feel this is not an issue as the basement if fully insulated and conditioned.

Window & Doors: Our design calls for triple glazed windows and doors. The triple glazing not onlyreduces heat loss in a cold climate, but also significantly improves thermal comfort for the occupants asthe interior surface temperature of the windows will be a few degrees warmer than a double panedwindow. Though there are many manufacturers in the US who are making triple and even simulatedtriple pane (through using a film in place of the center pane of glass) windows, our experience is that thetriple pane windows being manufactured in Europe are actually more economical and higherperforming. The imported windows have lower U-frame values, better performing glass spacers, andhigher solar heat gain glass – an important quality for a cold climate as the glass will admit more of thesun’s free heat. Luckily, many of the manufacturing facilities are near ports as is the site. Shipping thewindows across the sea can actually have a smaller carbon footprint than trucking them across thecountry or for Canada, where some of the best performing windows in North America are currentlymade. Shipping from manufacturing facilities in to ports in Europe is often a short distance by truck orrail. Shipments can be received in Port of Providence. Using the transportation carbon calculator foundat log-net.com , we compared the carbon foot print of windows fabricated by a supplier we’ve used inGermany vs. another in Ontario, Canada. The result was over 5% more metric tons of carbon for thewindows fabricated in Canada. With both a better price point and performance, the imported windowsare a great option.

Air Barrier: A continuous air barrier is detailed from the foundation up to the roof and back down again.An effective air barrier will significantly decrease operational energy, make the envelope more durableas the majority of moisture is carried through air movement, and improve the thermal comfort for theoccupants. The air barrier is called out in one of our building sections. Of note is the use of both the ZIPwall sheathing and building paper. The ZIP system is a great air barrier – it’s more economical thanplywood and it’s continuity can be visually verified. Though the coating on the ZIP system does double asa code approved weather barrier, we’ve included a layer of building paper in order to allow traditionalflashing details throughout the wall assembly.

Heating, Cooling, Ventilation & Hot Water

We’ve designed the house to be all electric so that the electricity can be offset in part or in full by PV orsolar panels atop the roof. The heating and cooling is provided via an air-source heat pump. It’s simpleand economical to install. The small size of the system is well suited to a low energy home such as thisone where the heating and cooling loads have been significantly decreased. National Grid, the localelectricity provider, offers a rebate up to $500 of this piece of equipment. There is also a Heat RecoveryVentilator (HRV) that will provide dedicated ventilation with heat recover, an important addition to anair tight home.

ENTRY P122

For domestic hot water, we’ve proposed a heat pump hot water heater. Though a solar thermal systemcan be an efficient means of creating hot water, it still requires a backup system. It also adds anadditional system to the house and competes for roof space with the PV panels. The energy consumedby the heat pump hot water heater can be offset by the production from the PV panels. National Gridalso offers a $750 rebate of heat pump hot water heaters.

Renewable Energy

We’ve sized a 7.5 kW PV or solar electric system for the four bedroom home and a 7.3 kW for the threebedroom home. Both array sizes will easily fit on the south-facing roof surface and will result in net-zeroenergy meaning the home will produce as much energy as it uses over the course of a year. There arecurrently two sources to offset the cost of the proposed PV array. The current installed cost of PV isabout $4.00 / watt. At this rate, the 7.5 kW array will have an installed cost of about $30,000. It may bepossible to further decrease this up front cost with in-kind donations. Though neighboring states, likeMassachusetts, offer PV leasing programs, they are not currently available in Rhode Island. If the projectdoes move forward to construction, this option should be reinvestigated. There is currently a grantavailable from the Rhode Island Renewable Energy Fund (RIREF) that will offset 25% of the system cost.There is also a federal 30% tax credit available for the installed cost. If the homeowner does not use theentire tax credit in the year the house is purchased, the credit can be rolled over until 2016.

Affordability and Constructability

The proposed construction system by Superior Walls should be cost competitive with a pouredfoundation with comparable insulation. Because it is a manufactured and marketing system, there mayalso be a greater potential for sponsorship relative to a traditional poured foundation.

The framed above grade walls should be easy and economical to construct with volunteer labor. If theproject is constructed, our team would be happy to provide framing plans that will minimize the use ofwasted wood, showing how the window and door placement, as well as the overall dimensions, conformto a sixteen inch on center grid. The ZIP wall sheathing is less expensive than plywood. It is installed likeconventional sheathing. Volunteers can tape the seams to create the air barrier, and a supervisor caneasily verify with a visual inspection that the system is continuous prior to the application of the buildingpaper. The wood roof trusses can be pre-manufactured or assembled by volunteers.

The rigid insulation can also be installed by volunteers. Though the product is available in 3” x 48” x 96”boards, it will be easier to install in the 3” x 36” x 48” size as it can be carried and handled by oneperson. The proposed use of furring strips to strap the siding back to the structure is a code approvedand tested installation detail. It should be noted, however, that we feel the installation of the strappingshould be executed by trained professionals and not volunteer labor. In addition to connecting thesiding back to the structure, the furring strips also create a drainage space behind the siding, which willimprove the life of the finish. This detail, typically called a rainscreen, is a best practice for sidinginstallation. After the furring strips are installed, volunteer labor can install the siding if this is commonpractice for Habitat projects.

ENTRY P122

This home, even without PV, will significantly exceed the basic requirements of the Energy Star program.Our experience working in Rhode Island is that homes of similar performance have received a $4,000rebate which helps to offset the upfront premium for additional insulation.

Aesthetics and Livability

Site & Exterior look

The exterior of the Little Green Rhody fits well with neighborhood vernacular of gabled homes witheither clapboard, brick veneer, or shingle siding. The majority of homes in the area do not conform withthe current zoning code – they are located too close to the street. The proposed design respects thebuilding setbacks and includes a front porch that will help to activate the street space.

Parking, on a two- or double-track driveway will limit paved area and increase the permeability of thesite. The parking is located along the north side of the site where there are few windows on the lowerlevel. This leaves the south side of the house open to the side yard. For the time being, the view out thesouth side also enjoys the view to the undeveloped neighboring lot.

Rain barrels located on the bottom of the down spouts collect rainwater for use in landscaping. Storagefor garbage bins, typically an eye sore, is conveniently located close to the street, between the front andside doors.

Shading from summer heat gain for the south facing second floor windows is provided by the two footlong overhangs. A wood shade trellis over the south facing sliding door will shade the door and the smallpatio. Additional covered outdoor space is provided at the front porch.

The front door serves as both the everyday and guest entrance for the home. The covered porch shieldthe entrant from the elements. To the right of the entry is a bench with storage below for taking offshoes and a coat closet sized to accommodate a large family.

The open kitchen, living and dining space is flexible to allow the family to furnish it to their liking. Thereis even space for a work space (not shown on plans) if the family would like to include one. The nine footceilings on the first floor will work well with the scale of the space. A full bathroom on the first floor willbe important for a large family.

The three bedroom plan creates acoustical privacy between each bedroom by using the closets as abuffer space. All of the bedrooms are generously sized with ample closet space. Bedroom 2 has twoclosets and a larger size than Bedroom 3, allowing to be shared by two children.

The four bedroom plan fits three modest sized children’s bedrooms in addition to a more generouslysized master bedroom. The large linen closet provides ample storage space for the family. Eachbedroom contains one south facing window.

PV ARRAY

STORAGE FOR GARBAGE BINS

RAIN BARREL

RAIN BARREL

HATCH TO BASEMENT

PROPOSED WOOD FENCE

N

BUILDING SETBACK

CAR 2

2 TRACK DRIVEWAY

CAR 1

PROPOSED 10' CURB CUT

0

SCALE: 1"= '

40 60 80

20

20

ENTRY P122 - SITE PLAN

P

BE

NC

H

TRELLIS

ABOVE

COVERED FRONT

PORCH

0

SCALE: 1"= '

16 24 32

8

8

UP

REF 7.5' x 5'

1/8" = 1' - 0"

N

LIN

EN

DN

BDRM 3

9' x 9'

BDRM 2

9' x 11'

BDRM 1

16.5' x 12.5'

7.5' x 5'

ENTRY P122 - 3 BEDROOM PLANS

P

BEN

CH

TRELLISABOVE

COVERED FRONTPORCH

0

SCALE: 1"= '

16 24 32

8

8

UP

REF 7.5' x 5'

1/8" = 1' - 0"

N

LIN

EN

DN

BDRM 49' x 9'

BDRM 39' x 9'

BDRM 29' x 9'

BDRM 116.5' x 10'

7.5' x 5'

ENTRY P122 - 4 BEDROOM PLANS

0

SCALE: 1"= '

8 12 16

4

4

1/4" = 1' - 0"

ENTRY P122 - EAST ELEVATION

0

SCALE: 1"= '

8 12 16

4

4

1/4" = 1' - 0"

ENTRY P122 - WEST ELEVATION

0

SCALE: 1"= '

16 24 32

8

8

1/8" = 1' - 0"

ENTRY P122 - ELEVATIONS

SOUTH

NORTH

LAP NON PERFORATED HOUSEWRAP OVER TOP OFWALL PRIOR TO INSTALLING ROOF TRUSS TOCONNECT WALL AND CEILING AIR BARRIERS

GYPSUM WALL BOARD CEILINGTAPED AS AIR BARRIER

ZIP® WALL SHEATHING TAPEDAS AIR BARRIER

TAPE SHEATHING TOFOUNDATION W/ ZIP® TAPE

TAPE AND SEAL INTERSECTION OFSLAB, POLYETHELENE ANDFOUNDATION TO CREATE AIR SEAL

WINDOW HEADER AND SILLPROFILE TAPED TO AIR BARRIER

BEDROOM

LIVING SPACE

INSULATED BASEMENT

HALLWAY LINEN

ENTRY P122 - BUILDING SECTION

PV ARRAY

ROOF ASSEMBLY (OUTSIDE IN):- ASPHALT SHINGLES- ROOFING PAPER- SHEATHING

WALL ASSEMBLY (OUTSIDE IN):- FIBER CEMENT CLAPBOARD SIDING- 1x4 FURRING @ 16" O.C.- 3" MINERAL WOOL INSULATION- BUILDING PAPER- ZIP® WALL SHEATHING- 2x4 @ 16" O.C., CAVITY FILLED W.MINERAL WOOL OR COTTON BATT- 1/2" GYPSUM WALLBOARD- NO VOC PAINT & PRIMER

SLAB ASSEMBLY (TOP DOWN):- 4" CONCRETE SLAB- 6 MIL. POLYETHELENE VAPOR BARRIER- 3" TYP IX EPS INSULATION

FOUNDATION WALL BY SUPERIOR WALL OREQUIVALENT (OUTSIDE IN):- 1 3/4" CONCRETE- 4 1/2" EPS INSULATION- 1/2" POLYISOCYANURATE INSULATION- 2 1/4" x 7 1/2" REINFORCED CONCRETESTUDS @ 24" O.C.- 1" EPS INSULATION WRAPPING STUDS

4" CRUSHED STONE

CONCRETE BASE TO FOUNDATION SYSTEM

DRAINAGE PIPE TO SUMP PUMP OR DAYLIGHT

TRIPLE GLAZED HIGHSOLAR GAIN SLIDING DOOR

WOOD TRELLIS TOSHADE SOUTH FACING

SLIDING DOOR

RAISED HEEL TRUSS

14" LOOSE FILL CELLULOSE

GUTTERS TO DOWNSPOUTS TORAIN WATER BARRELS

2' OVERHANG SHADESSOUTH-FACING SECOND

STORY WINDOWS

TRIPLE GLAZED HIGHSOLAR GAIN WINDOWS BEDROOM

LIVING SPACE

INSULATED BASEMENT

HALLWAY

9' -

0"

8' -

0"

ENTRY P122 - BUILDING SECTION & AIR BARRIER DIAGRAM

APA 4BR Net Zero

,

5 Stars Plus

Registry ID:Rating Number:

Certified Energy Rater:Rating Date:

Rating Ordered For:

Estimated Annual Energy Cost

Use MMBtu Cost Percent Heating 6.3 $266 -1707% Cooling 2.0 $83 -535% Hot Water 6.2 $262 -1681% Lights/Appliances 18.1 $764 -4900% Photovoltaics -33.0 $-1392 8924% Service Charges $0 -0% Total $-16 100%

This home meets or exceeds the minimumcriteria for all of the following:

2009 International Energy Conservation Code

ZeroEnergy Design156 Milk Street, Suite 3Boston, MA 02109617.720.5002

Certified Energy Rater

Uniform Energy Rating System1 Star 1 Star Plus 2 Stars 2 Stars Plus 3 Stars 3 Stars Plus 4 Stars 4 Stars Plus 5 Stars 5 Stars Plus

500-401 400-301 300-251 250-201 200-151 150-101 100-91 90-86 85-71 70 or Less

Energy Efficient

HERS Index: -0 Efficient Home Comparison: 100% BetterGeneral Information

Conditioned Area: 2039 sq. ft. HouseType: Single-family detachedConditioned Volume: 19396 cubic ft. Foundation: Conditioned basement

Bedrooms: 4Mechanical Systems Features

Air-source heat pump: Electric, Htg: 10.5 HSPF. Clg: 17.5 SEER.Water Heating: Heat pump, Electric, 2.40 EF, 66.0 Gal.

Duct Leakage to Outside: 1.00 CFM.Ventilation System: Balanced: HRV, 60 cfm, 30.0 watts.

Programmable Thermostat: Heating: Yes Cooling: Yes

Building Shell FeaturesCeiling Flat: R-52 Exposed Floor: NA

Vaulted Ceiling: NA Window Type: Schuco Si82Above Grade Walls: R-27 Infiltration:

Foundation Walls: R-10.7 Rate: Htg: 1.00 Clg: 1.00 ACH50Slab: R-13.2 Edge, R-13.5 Under Method: Blower door test

Lights and Appliance FeaturesPercent Interior Lighting: 100.00 Range/Oven Fuel: ElectricPercent Garage Lighting: 100.00 Clothes Dryer Fuel: Electric

Refrigerator (kWh/yr): 450.00 Clothes Dryer EF: 3.01Dishwasher Energy Factor: 0.75 Ceiling Fan (cfm/Watt): 0.00

The Home Energy Rating Standard Disclosure for this home is available from the rating provider.

REM/Rate - Residential Energy Analysis and Rating Software v13.0 This information does not constitute any warranty of energy cost or savings.

© 1985-2012 Architectural Energy Corporation, Boulder, Colorado.

4 BedroomEntry P122

PERFORMANCE FACTORS - C:\...\JMC 2011 UDRH v2 for REM 12.9.udr

Date: March 01, 2013 Rating No.:

Building Name: APA 3BR No PV Rating Org.:

Owner's Name: Phone No.:

Property: Rater's Name:

Address: , Rater's No.:

Builder's Name:

Weather Site: Providence, RI Rating Type:

File Name: APA_REM_3BR NoPV.blg Rating Date:

REM/Rate - Residential Energy Analysis and Rating Software v13.0 This information does not constitute any warranty of energy cost or savings.

© 1985-2012 Architectural Energy Corporation, Boulder, Colorado.

UDRH APA 3BR No PV DIFF % DIFF

Normalized Loads (Btu/sf shell area/DD) Heating: 2.65 0.77 1.88 71.1% Cooling: 17.86 14.22 3.63 20.4%

Normalized Consumption (kBtu/sf floor area/yr) Heating: 22.6 a 4.1 18.6 82.0% Cooling: 1.7 1.1 0.6 36.4% Water Heating: 7.7 2.7 5.1 65.5% Lighting: 1.6 1.6 Appliances: 7.0 7.0 Photovoltaics: -0.0 -0.0 Total w/o PV: 40.6 16.4 24.2 59.7% Total: 40.6 16.4 24.2 59.7%

Normalized Consumption (Btu/sf floor area/DD) Heating: 3.8 0.7 3.1 82.0% Cooling: 11.0 7.0 4.0 36.4%

Normalized Costs ($/sf floor area/yr) Heating: $ 0.952 $ 0.171 $ 0.781 82.0% Cooling: $ 0.070 $ 0.045 $ 0.026 36.4% Water Heating: $ 0.327 $ 0.113 $ 0.214 65.5% Lighting: $ 0.067 $ 0.067 $ -0.000 -0.0% Appliances $ 0.294 $ 0.294 $ 0.000 0.0% Photovoltaics $ -0.000 $ -0.000 $ Total: $ 1.710 $ 0.690 $ 1.021 59.7%

Normalized Design Loads (Btuh/sf shell area/DD) Heating: 0.0022 0.0005 0.0017 78.1% Cooling: 0.0323 0.0136 0.0188 58.0%

Normalization Factors Floor Area: 2039 2039 Shell Area: 4576 4576 Heating Degree Days (B65): 5909 5909 Cooling Degree Days (B74): 151 151

a Duct loss exceeds 50% of equipment capacity. Verify duct and equipment sizing inputs.

3 Bedroom#P122

PERFORMANCE FACTORS - C:\...\JMC 2011 UDRH v2 for REM 12.9.udr

Date: March 01, 2013 Rating No.:

Building Name: APA 4BR Net Zero Rating Org.:

Owner's Name: Phone No.:

Property: Rater's Name:

Address: , Rater's No.:

Builder's Name:

Weather Site: Providence, RI Rating Type:

File Name: APA_REM_4BR wPV.blg Rating Date:

REM/Rate - Residential Energy Analysis and Rating Software v13.0 This information does not constitute any warranty of energy cost or savings.

© 1985-2012 Architectural Energy Corporation, Boulder, Colorado.

UDRH APA 4BR Net Zero DIFF % DIFF

Normalized Loads (Btu/sf shell area/DD) Heating: 2.58 0.73 1.84 71.6% Cooling: 19.39 15.62 3.77 19.4%

Normalized Consumption (kBtu/sf floor area/yr) Heating: 22.0 a 3.9 18.1 82.3% Cooling: 1.8 1.2 0.6 35.7% Water Heating: 8.7 3.0 5.7 65.1% Lighting: 1.6 1.6 Appliances: 7.3 7.3 Photovoltaics: -0.0 -0.0 Total w/o PV: 41.4 17.0 24.5 59.0% Total: 41.4 17.0 24.5 59.0%

Normalized Consumption (Btu/sf floor area/DD) Heating: 3.7 0.7 3.1 82.3% Cooling: 12.0 7.7 4.3 35.7%

Normalized Costs ($/sf floor area/yr) Heating: $ 0.927 $ 0.164 $ 0.763 82.3% Cooling: $ 0.076 $ 0.049 $ 0.027 35.7% Water Heating: $ 0.368 $ 0.128 $ 0.240 65.1% Lighting: $ 0.067 $ 0.067 $ Appliances $ 0.308 $ 0.308 $ Photovoltaics $ -0.000 $ -0.000 $ Total: $ 1.746 $ 0.716 $ 1.030 59.0%

Normalized Design Loads (Btuh/sf shell area/DD) Heating: 0.0022 0.0005 0.0017 78.0% Cooling: 0.0335 0.0148 0.0187 55.8%

Normalization Factors Floor Area: 2039 2039 Shell Area: 4576 4576 Heating Degree Days (B65): 5909 5909 Cooling Degree Days (B74): 151 151

a Duct loss exceeds 50% of equipment capacity. Verify duct and equipment sizing inputs.

4 Bedroom#P122

ENTRY P122

Calculations

Concrete Volume at Superior Wall Foundation System: Walls & Cast Concrete Columns

Walls= 163 cf

Column= 34 cf

Total= 197 cf (1cf = 0.037037 yd3) = 197cf x 0.037037yd3 = 7.29 yd^3 of Concrete, 4” Slab= 7.22 yd3

Slab + Superior Wall System: 7.29 + 7.22= 14.5 yd^3 of Concrete

Comparison: Typical Concrete Foundation (Basement) Based on Same design.

Walls= 724.44 cfFooting= 164.29 cfSlab= 193.22 cf

Total = 1081.95 cf (1cf = 0.037037 yd3) = 1081.95 cf x 0.037037yd3 = 40yd^3 of Concrete

Potential CO2: Calculations Include Whole Assemblies, with matching insulation specifications.

Superior Wall System: Walls= 9.87 Tonnes , Slab 2.93 Tonnes; Total= 12.8 Tonnes

Typical Foundation: Walls= 10.1 Tonnes, Footing 2.98 Tonnes, Slab 3.33 Tonnes;Total= 16.32 Tonnes

Overall Project Totals: Superior Wall System Model= 33.64 Tonnes ; Typical Foundation 40.87 Tonnes

Extra Base Materials:

Rebar at Superior Wall= .6 cf(Density of Steel=0.283 lb/in^3) (1lb= .0005 t (short tons) ( 1cf = 1728 in^3)

1728 in^3 x 0.283 lb/in^3 = 489.024 lb489.024lb x 0.6= 293.4144 lb

294 lb x 0.0005 t (tons) = (.147t ) x 1.10 = .1617t

Metal Studs at Superior Wall= 4cf(Density of Steel=0.283 lb/in^3) (1lb= .0005 t (short tons) ( 1cf = 1728 in^3)

498.024 lb x 4 = 1956.096 lb1956.096 lb x 0.0005 t (tons)= 0.978048t (short tons)

Attic Insulation= 638 sf x 14” = 8932 sf (1”)Insulation Measured From Inside face of framing

Trellis & Deck/ Porch lumber= Trellis= 20cf , Columns= 15.68cf; Total= 35.68cf

35.68cf x 12bf= 428.16 bf428.16 bf / 1000 bf= .428 Mbfm

Strapping, Interior & Exterior= 279 bf (1 Mbfm= 1000 bf)

279bf / 1000 bf= .279 MbfmDeck/ Porch Concrete footings= 4cf

4cf x .037037 yd^3= 0.15 yd^3