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2018 Sustainability Report
2018 Sustainability Report
2
TA B L E O F C O N T E N T S
Site Energy 4-5
Manufacturing Impact
Waste 6-7
Water 8
Green Building Impact
Material Sustainability 9
Durability 16
Indoor Air Quality 17
Green Certifications 11
Renewable Energy Use 19
Community ImpactCommunity 21
Employees 22
Notable Builds: 2018
Shipping 8
Energy Efficiency 14-15
Green Consulting 18
Mountain Paradise 26
Passive Solar Design 12-13
Zero Energy Ready 24-25
Other Builds 27
Manufacturing Impact
3
“Panelized building is an inherently green way to build. Factory assem-bly means reduced construction material waste, less jobsite disturbance, and easier cleanup.” -National Association of Homebuilders
Manufacturing Impact
4
A major lighting improvement to our fa-cility in late 2014 resulted in a 6% drop in electricity use the following year.
Deltec Homes has operated with 100% renewable site electricity since 2007
A combination of purchased wind power and a 55 KW rooftop solar array allows us to build every home using 100% renewable energy. With that, we understand that a reduction in energy use is still critical to reducing our total energy impact. Therefore, we’ve identified energy efficiency improvements to our 100+ year old building and continue to seek ways to drop our conventional electric energy use footprint.
343 348 341 329 302 323384
77 75 75 63 75 6867
0
100
200
300
400
500
2012 2013 2014 2015 2016 2017 2018
Electricity Used (Megwatt-Hours)Wind Power Purchased Power Generated on-site w/ Solar
Building envelope improvements, including a new reflective roof and roof insulation, dropped energy use even further, mostly through cooling load reductions.
In 2016, we added a new model home, increasing our facility count, and ramped up production signifi-cantly from past years, resulting in
more total energy use.
In 2018, we had a 28% increase in our home production. In addition, we moved our pre-finishing operation in-house. This increased overall energy use, though only by 47% of the energy used by the operation’s previous facility.
Site Energy
MANUFACTURING IMPACT
5
A 55KW solar array, installed in 2007, pro-vides a portion of our on-site electrical use. The other portion comes from wind power purchased through a green energy provider.
Compressed air, used for most of our powered nail guns, saws, and other tools, is another source of energy use that we are determined to improve.
We are considering a demand response program with our local power company to remotely shut off our AC systems for up to 15 minutes at a time during times of peak demand to reduce grid impact.
Natural gas use is fixed based on heating costs and building envelope improvements have not made a signifi-cant impact to this number. We’re exploring carbon footprint and carbon offset potential for natural gas use. Other small scale site energy sources that are more difficult to track need to be accounted for. Site energy impact from forklift use and mileage with company fleet vehicles need to be quantified—shipping of our product is considered separately (see page 8).
18728 19875
24977
0
5000
10000
15000
20000
25000
30000
2016 2017 2018
Natural Gas (Therms)
We use natural gas to heat our 100+ year old facility. Heating energy use fluctuates as Asheville’s winters fluctuate. In 2015, we improved our facility’s insulation, but 2017 and 2018 saw harsher winters than average.
Site Energy Areas for Improvement
6
81.6% 81.9%
84.3%
5 YearAverage
2016 2018
M a n u f a c t u r i n g W a s t e D i v e r t e d F r o m L a n d f i l l
WasteOur manufacturing process produces no hazardous wastes. Through comprehensive re-use, donation, and recycling programs, we are able to divert an average of over 80% of our manufacturing waste by volume from the landfill.
Habitat for Humanity collects pallets of our usable scrap plywood, usable scrap insulating foam board, and lengths of fiber cement siding, to sell in their local Re-Store, whose proceeds benefit Ashe-ville area habitat projects.
Local Artists and Woodworkers regularly collect our scrap foam or wood for their own projects. A local woodworking collective has recently turned some of our scrap southern yellow pine into high quality toys for a Christmas fund drive.
1%10%
73%
0%16%
Waste StreamsCardboard/Paper/Glass/SteelDonated or Reused
Mulch/Boiler Fuel
Scrap Metal
Landfilled Waste
Waste Reduction Program Highlights
MANUFACTURING IMPACT
7
Small scrap plywood remains a large, capital-intensive challenge to recycle. Significant capital expendi-tures would be required to purchase chipping and re-selling equipment.
Constantly changing (and generally shrinking) regional markets for recyclable materials such as plastics, make finding new recycling streams and maintaining old ones challenging.
Building materials are often dense and composed of composite materials that are already down-cycled or else very hard to recycle. Better life-cycle assessments needed and a shift to more materials with high recycled content may be the best path to greater reductions in life cycle costs of our manufacturing waste.
Waste Areas for Improvement
North Carolina Wildlife Commission, in partnership with Wild South, has hosted barn owl and northern flying squirrel box building nights in our plant, turning some of our otherwise unusable scrap plywood into nest boxes for endangered and threatened species.
Insulated Headers: We insulate the structural header in our Energy Wall with small pieces of foam board that would have otherwise been discarded. Insulating headers is not typical practice for most home build-ers, but it not only increases the efficiency of the home, it gives us an opportunity to reuse and recycle.
Optimized Saw: Our TCT saw uses sophisticated software to op-timize cutting based on our inventory and the jobs loaded into the system. Waste pieces that can be converted into commonly used truss webs are marked for special recovery.
Northern flying squirrel in a nest box built by Deltec employees with our scrap plywood. Photo courtesy C. Kelly. Nest boxes allow NC Wild-life staff to monitor squirrel populations in areas of critical habitat.
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Shipping
Every Deltec structural shell is manufactured in a facility in Asheville, NC, and shipped to the customer’s job site. Sometimes the job site is right next door, often it is across the country. Shipping our homes, for now, still relies on fossil fuel energy, typically in the form of enclosed tractor trailers. In 2018, as in 2017, we partnered with Appalachian Offsets, an Asheville-based non-profit, to offset our carbon emissions from our domestic ship-ping. These offsets are helping to fund a solar array project at Isaac Dixon Elementary School.
Domestic Shipping miles offset 2018: 84,000
Water
Our manufacturing process does not use a significant amount of water. Our water use is primarily from normal office operations and was well below average for a com-pany of our size.
Used in our office and model homes, well below the average 920K gallons per year for an office of our size.
Source: US Energy Information Administration 2012 survey
137kgallons
MANUFACTURING IMPACT
9
Material Sustainability
Truss Lumber and Plywood: Our exclusive supplier of truss lumber, Beadles Lumber (now owned by Canfor Southern Pine), has achieved the Sustainable Forestry Initiative® (SFI) Certified Sourcing certification. We’re proud to add them to the list of our other SFI Certified material: plywood by Georgia Pacific, used in our wall, roof and floor sheathing, and Huber Advantech, floor sheating used in our Ridgeline and Solar Farmhouse models. The Sus-tainable Forestry Initiative® supports sustainable forest management.
Other Lumber: Spruce Fir lumber used for stud framing and other small scale lumber items comes from varying sources, but SFI material is preferred.
Metal Shingle Roofing, an optional upgrade on our round homes, is an Energy Star Certified cool roof product, containing 90% recycled content. The shingle shape allows for reduced waste on our roof compared to sheet metal.
Windows: Come from Marvin Integrity, a 100% US made and woman-owned company, with Energy Star Certification on most window options, and high effi-ciency Tripane available for cold climate and high energy performance projects.
Locally Sourced Components: Our fiber cement siding, plywood sheathing, and metal structural compo-nents are manufactured or fabricated and come from suppliers located within 150 miles of our manufactur-ing facility. Typar drainable housewrap and truss lumber come from facilities within 500 miles of our plant.
Composite Siding: The Solar Farmhouse features a new sustainable siding choice: Boral TrueExterior™ polyash siding. This product is Cradle to Cradle Certified™ Bronze, and contains a minimum of 70% re-cycled content. Cradle to Cradle Certified™ products are evaluated for material health, material re-utili-zation, renewable energy use and carbon management, water stewardship, and social fairness.
All Composite Wood Products: Including Plytanium plywood, Advantech sheathing, any structural LVL components, Miratek Trim, LP Smartside soffit material, are CARB II Compliant.
Our shell packages are composed of raw and manufactured building materials from various suppliers in the United States. Many of our suppliers must provide materials that meet our exacting standards for durability, strength, energy efficiency, and quality. We also vet our suppliers for their environmental, health, safety, and diversity practices, and consider many elements of environmental sustainability when selecting products.
MANUFACTURING IMPACT
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“Green building is not just better for the planet, it also makes people’s lives better. It helps people build houses that are more comfortable, more durable, and makes people happier.” -Amy Musser, PhD
Green Building Impact
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Green Building Certifications
Green Building Certification programs rely on recognized, third-party standards and are an important component of quality building. They require performance testing and inspections by a certified Rater and adherence to a set of rules and guidelines. Deltec encourages all of our clients to pursue a green building certification. While many do, we still feel too few homeowners are choosing not to pursue certi-fications that they might easily be able to achieve with a Deltec.
2018 Featured Green Certified Home:This Ridgeline B, built by Deltec Building Company, was the first Del-tec—and the first home in Western North Carolina—to be certified under the DOE’s prestigious Zero Energy Ready Home Program. This program requires the most advanced green practices in every area of construction and automatically earns both Energy Star and Indoor Air Plus certifications. Learn more on our case study of this home, page 24.
Energy Star Certified homes are 15-30% more energy efficient than standard new construction. They’re also designed and tested to use the most cost-effective and practical energy efficiency features.
Comprehensive green building programs such as LEED for Homes, Green Built NC, Earthcraft (Vir-ginia and Georgia), and the National Green Building Standard, look at green building from multiple dimensions. Points are rewarded for practices in everything from energy efficiency and durability to material stainability.
The DOE Zero Energy Ready Home requires using only the most advanced green building practices in energy efficiency, air quality, durability, water ef-ficiency, and solar-ready design.
4 Deltecs
Certified in 2018
34 total since 2009
1 Deltec
Certified in 2018
1 total
1 Deltec
Certified in 2018
7 total since 2007
GREEN BUILDING IMPACT
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Passive Solar Design
2018 Featured Passive Solar Home:
This 1500 model round home uses passive solar design in cold Illinois. The south-facing windows, over-hang length, and exposed concrete slab foundation with insulation underneath the slab, work in concert to keep the living space comfortable despite high fluctua-tions in outdoor temperature.
21% of projects shipped in 2018 incorporated passive solar or natural comfort design principles into their total energy-efficient design strategy, often working with our green building consulting services to achieve this design (see page 18 for more about these services).
Passive solar design is a strategy for laying out the home that considers your local climate factors to re-duce heating and cooling loads based on the home’s shape and movement of the sun throughout the year. Ancient design principles of window orientation, shape, insulation and shading, when paired with modern construction methods, building materials, and technologies available to build a very energy efficient and durable home, offer significant opportunities to reduce site energy, and offers a home with unparalleled resilience and comfort.
GREEN BUILDING IMPACT
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Orientation Large, south-facing windows in an open living area allow direct sunlight to heat the space in winter, reduc-ing the demand on the heating system. The appropriate area of south-facing glass is calculated as a ratio of the floor area of the home, based on climate zone and level of passive solar being pursued.
Shading The overhang is thoughtfully selected to shade the south-facing windows in the summer, reducing demand on the cooling system, and leave them unshaded in the winter, allowing heat gain. The length is determined based on home’s wall height, window size, and latitude.
Thermal MassDense material inside the living space, such as stained concrete or tile floors, slate wall tile, or other thermal mass absorbs the sun’s heat from the windows and stores it, keeping the room at a more constant tempera-ture throughout the day, and the year. The required surface area of thermal mass is calculated according to the square footage of south-facing glass.
Super-InsulationThe level of insulation in the walls, ceiling, and foundation should go well above local code requirements to take advantage of the heat gained from the passive solar sunspace. Slab foundations in particular should be insulated to isolate concrete temperatures from the ground.
Since the beginning of time, people have used the shape and placement of their homes to maximize comfort and minimize energy use. Using the guiding principles of passive solar design, you can take advantage of the sun’s movement throughout the year to reduce heating and cooling bills.
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Energy EfficiencyA panelized Deltec shell is a highly energy efficient template upon which to finish out a home, and our home-owners chose us because they want to reduce the energy impact of their own built environment. Our system allows for a better building envelope than typically possible in new construction, using methods such as super-insulation, exterior insulation that reduce thermal bridging, and an incredibly air-tight structure.
2018 energy performance metrics:
Average Blower Door Test Score: 1.3ACH50
Average HERS Index: 45
• Lowest on record: 0.62ACH50, achieved by our in-house building com-pany
• Highest on record: 2.72ACH50, achieved by a builder new to the Energy Star program
• Lowest on record: 0• Highest: 63
58% of Homes Shipped Exceeded 2009 IECC by 20%
58 % of Deltec homes shipped in 2018 exceeded the 2009 international energy conservation code by 20% or more. See facing page for more on energy codes.
Left: our Airblock gasket, part of our Energy Wall and Double Stud Wall packages, is a feature installed in our plant that improves panel tightness.Right: A panelized shell, by virtue of tight toler-ances, offers a notably air-tight way to build.
The HERS Index is a tool used by green building certification programs, and increasingly by energy codes, to scale a home’s efficiency. The lower the score, the more efficient, with a score of 100 indicating a basic new home built to code, while a HERS of 0 indicates a net-zero energy home.
24% of Homes Shipped Exceeded 2015 IECC by 20%
GREEN BUILDING IMPACT
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Deltec and Building Energy Codes
The IECC is updated every three years and gets more strict with each update, though different states adopt new versions at different paces. Some states still follow very old energy codes or no energy code at all, while others quickly adopt the newest IECC or even write their own, stricter versions. Therefore, the question “does this home meet energy code?” or more importantly ”does this home exceed energy code?” depends very much on location.
Knowing the variations of energy codes across the country, we offer energy efficient options that can be added to your Deltec shell and will put your home well ahead of the curve in most locations. These options include our Energy Wall with 2x6 framing plus R5 exterior insulation, Double Stud Wall with two layers of 2x4 studs, Energy Saver and Energy Saver Plus trusses, and Energy Star Certified windows.
Each year we track the percentage of projects that incorporate these energy efficient options and can exceed the 2009 IECC, which is the most adopted version in the US, by at least 20% based on energy modeling. In 2017, we began tracking those that can also exceed the 2015 IECC, the most stringent model energy code yet, by at least 20% (page 5).
This level of efficiency is a common performance goal for clients seeking distinction with the most advanced green building programs, such as the DOE Zero En-ergy Ready Home.
The International Energy Conservation Code (IECC) is the model energy code used in the US for residential construction. It sets insulation, window performance, and other energy efficiency mea-sures required by the law. These requirements vary by US climate zone, with colder climates requiring stricter energy efficiency measures than warmer climates.
Us Climate Zone map used by most state code programs. Higher num-bers indicate colder climates, and higher insulation R-value requirements for walls, roof, floor, and for windows.
States adopt new versions of the IECC codes at different rates. Newer codes are published by the IECC every 3 years and tend to increase ef-ficiency measures required with each new version. According to analysis for the Department of Energy, the provisions in the 2009 IECC reduce average energy costs by 10.8%, and the 2012 by 32.1%, compared to the 2006 IECC1. The 2015 IECC delivers an additional 0.98% energy savings over the 20122.
1. DOE Building Technologies Program. April 2012. National Energy Cost and Cost Savings for New Single- and Multifamily Homes: A Comparison of the 2006, 2009, and 2012 Editions of the IECC.
2. WV Mendon et. May 2015. 2015 IECC: Energy Savings Analysis. Pacific Northwest National Laboratory
GREEN BUILDING IMPACT
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Durability
Surviving a hurricane is one of the most profound durability benefits of living in a Deltec home. But even if you don’t live in a high wind or high seismic zone, you benefit from an incredibly durable home made of high quality, long-lasting materials. We believe homes should only be built once, last for genera-tions, and allow our homeowners to reduce time and money spent on maintenance.
Fiber Cement Siding: Offering a 50 year warranty on the material, and a 25 year warranty on paint if pre-painted in our facility.
Typar Drainable Housewrap: Offers a moisture-permeable drainage plane with integral gap to improve drainage and break hydrostatic pres-sure.
5/8” CDX Plywood Roof, Wall and Floor Sheathing: Twice as strong as the OSB (Oriented strand board) sheathing predominately used in the building industry, while also holding up better to moisture.
Classic Metal Shingle Roof: Comes with a 50 year warranty.
Fortified Homes Program: Deltec Homes can be certified through a local Rater with the Fortified Homes program, recognized by the insurance industry in some states for exceptional wind resistance and reduced risk of home loss.
Track Record: In 2018, we had several homes in the direct path of Hurricanes Florence and Michael. We’re proud to report that none of them sustained dam-
aged.
A Deltec home in Mexico Beach, FL after Hurricane Michael
GREEN BUILDING IMPACT
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Indoor Air Quality
Mechanical Fresh Air VentilationWe recommend balanced ERV or HRV fresh air ventilation systems designed to provide ASHRAE62.2 recommended ventilation levels. We offer ERV and HRV products designed to meet the ASHRAE standard for any job shipped.
Source Control
All products included in the Deltec Shell package comply with LEED 2008 VOC emissions standards, CARB II and contain no urea formaldehyde.
Any combustion appliances used in our homes should be direct-vent, with outside air intake. We rec-ommend only EPA Phase II certified wood burning stoves or fireplaces. We do not condone the use of unvented gas appliances.
Kitchens and bathrooms should incorporate local exhaust systems according to Energy Star for Homes and ASHRAE 62.2 standards, and should be tested to verify performance.
Choose low-VOC paints, stains, carpets, wood flooring, cabinetry, countertops, and composite wood products, such as those that are GreenGaurd Certified, CARB II Complaint, or GreenSeal Plus labeled.
The indoor environment is critical for the health and well being of everyone who spends time in buildings. Deltec works with clients to understand and incorporate the best available practices for reducing indoor air pollutants and providing proper ventilation and moisture control to their homes, based on sound building science research. Our strategy:
Pre-Occupant FlushWe recommend clients flush their homes with open windows and fresh air ventilation system for 48 hours prior to move in to dissipate any remaining offgassing from construction.
Radon ControlWe recommend clients install a passive sub-foundation radon system if building in areas at risk for radon. If testing after move-in reveals elevated radon levels, the passive system should be activated.
ERVs or HRVs are the most energy efficient way to provide balanced fresh air ventilation. They are a critical component in any air-tight, high-performance home. Acting as lungs of the house, they bring in controlled fresh air.
GREEN BUILDING IMPACT
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Green Building Education and Outreach
Deltec Homes has a building scientist and HERS Rater on staff who is available to consult with clients on green building strategies for free. This has been a popular service of our company since 2006. We are available to work with clients on:
-Building science best practices, including insulation strategies, & HVAC strategies
-Indoor air quality best practices
-Projected energy use modeling for a pro-posed home design
-Green building certification planning
-Passive solar design analysis
-Active solar system planning
-Material sustainability product research
280 people educated on green building at our home building seminars in 2018
51% of homes shipped in 2018 took advantage of our green building consulting services
Deltec Homes is a proud member of the Green Built Alliance, WNC’s premier non-profit for promoting green building in our region, and the NC Building Performance Association, a non-profit advocating for more energy efficient buildings in our home state of North Carolina. Through these organizations we have written articles, letters to policy makers, held educational workshops, and volunteered time for fundraising efforts to help these organizations continue their missions.
24% of homes shipped in 2018 used energy modeling to guide design
Homebuilding Seminar
GREEN BUILDING IMPACT
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Renewable Energy
5 Deltec projects incorporated renewable energy in 2018
2018 Featured Solar Project
A charming, 1000 square foot bungalow, located in a vibrant infill lot in Asheville, featuring air-tight construction, mini-split heat pumps, heat pump water heater, a 4KW solar elec-tric array, and a nice mountain view.
Many Deltec homeowners dream of reducing the environmental impact of their home through solar ener-gy. A home built for energy efficiency requires a much smaller and more manageable solar array to provide it’s energy needs than a typical home. We help our clients go solar in a number of ways: from our PV-based solar hot water system, to finding local installers for solar electric systems, to understanding incentives and local solar regulations available in their region.
Our Sun Bandit solar hot water system uses two to four solar electric panels, and a spe-cial electric water heater, to provide interrupted water heating from solar with lower ongoing maintenance than the older, solar thermal style systems. This is a complete hot water kit available with the Deltec Homes shell package.
GREEN BUILDING IMPACT
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Community Impact
“Society’s most challenging problems cannot be solved by government and nonprofits alone. The B Corp community works toward reduced inequality, lower levels of poverty, a healthier environment, stronger communities, and the creation of more high quality jobs with dignity and purpose.” -BLabs, Inc, the non-profit organization certifying Benefit Corpo-rations (BCorps)
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Community
Certified B CorpDeltec Homes remains a Certified B Corp, an honor given to companies who meet the highest standards of verified social and environmental perfor-mance. The process is rigourous and entails an assessment that weighed and scored our company on metrics of governance, workers, community, and environmental stewardship. We completed our re-certification for 2017 with a slight improvement in our overall score on the B-Impact assess-ment.
Living Wage Employer A community is only as strong as we make it, and in order for a community to thrive, it is critical that its inhabitants earn enough money to be self-sustaining members. We are proud to be Living Wage Certified, an official recognition of our efforts to promote a just and sustainable local economy through the Living Wage program of Just Economics in Western North Carolina, the largest program of its kind in the United States.
Community Service HoursDeltec employees give many hours to community service on company time, for projects ranging from a regular meals on wheels route, to community and student education on green building. At least 200 volunteer hours were put on record by our staff in 2018.
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Employees
Over 80% of Deltec employees reported feeling engaged with their work
Average employee tenure is 10 years
79% woman-owned company
33% women and minorities in management
100% of promotions in 2018 occurring from within
Corporate Giving
In 2018, we were able to donate over 1% of our profits to local non-profit groups and causes that matter to our founders and our employees:
• Meals on Wheels of Buncombe County• Helpmate Womens’ Shelter• Children First• Habitat for Humanity• Global Giving
• Council on Aging• Asheville Buncombe Technical Community Col-
lege• Francine Delaney New School for Children• Brother Wolf Animal Rescue
Morning yoga with the Deltec staff
COMMUNITY IMPACT
23
“During every step of the way, from purchasing to designing to having the structure delivered, it was a breeze to work with the people at Deltec. They are really fine people.” -Joy & Bob, Deltec Homeowners
Notable Builds 2018
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WNC’s First Zero Energy Ready Home
After speaking with multiple Deltec Homeowners, John and Barry knew they wanted one of our Ridgline models. And after attending one of our home building seminars, we knew we wanted John and Barry as clients! Creative, patient, thoughtful, and thorough, they were a pleasure to work with. In addition, their home helped expand Deltec Building Company’s repertoire, achieving the Department of Energy’s rigorous Zero Energy Ready Home Certification.
Insulation: Deltec Energy Wall with 2x6 framing insulated with R19 fiberglass batt insulation +R5 exterior XPS for R24 total, R30 open cell foam in roof, Energy Star windows, 1763 square feet, with detached garage and covered screen porch and breezeway.
Systems: Mitsibushi hyper-heat mini-split heat pump and AC system, Heat Recovery Ventilator (HRV) fresh air ventilation system, 6.8KW grid-tied solar array, heat pump water hater, condensing dryer, induction range, direct-vent propane fireplace, and hot water recirculation pump with manual control (A new feature required by the ZERH program in this floor plan.)
Other: Energy Star for Homes, Indoor Air Plus and DOE Zero Energy Ready Home Certifications, HERS 0
NOTABLE BUILDS
25
Zero Energy Ready Homes must also meet EPA Indoor Air Plus Certification, requiring mechanical fresh air ventilation, passive radon mitigation, higher levels of filtration, ultra-low emitting paints, stains, carpet and wood products, and safe and clean burning combus-tion appliances. It also requires that steps be taken to reduce pollutants during construction such as covering all registers and flushing out the home prior to occu-pancy.
Energy Star Certified Homes are already notably efficient due to above code insulation levels, superior air-tightness, efficient LED lighting and Energy Star Certified appliances. Zero Energy Ready Home requires that and more, with a lower target HERS score and a requirement that all duct-work be kept inside the heated space, where it will operate much more efficiently.
Water must not only be heated efficiently, like with this highly efficient heat pump water heater, but delivered to distant fixtures with minimal waste of water or energy while waiting on hot water to arrive. This was achieved with a hot water recirculation pump: homeowners simply hit the button, wait about 40 seconds, then turn their tap on for water that’s already hot.
What’s so Special About a Zero Energy Ready Home?
The DOE Zero Energy Ready Home program requires builders to up their game. Earning this certification goes a step above other green certifications, requiring some of the best of what building science has to of-fer homeowners for energy efficiency, durability, water efficiency, solar energy use and indoor air quality.
It wouldn’t be “zero energy ready” without the “zero energy”—in this case, a 6.8 kilo-watt grid-tied solar array, sized to meet the home’s electricity needs with a net energy bill of 0. HERS score: 0.
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Mountain ParadiseMark has always been intrigued by unusual things. His goal for the design of his home was a distinctive, natural architecture blended with the amenities of modern life and a rewarding sense of creation.
Insulation: Deltec Energy Wall with 2x6 framing insulated with R19 fiberglass batts +R5 exterior XPS for R24 total, R30 closed cell spray foam in roof, Energy Star window 1500 square feet attached garage.
Systems: Mitsibushi mini-split heat pump and AC system, Energy Recovery Ventilator (ERV) fresh air ventilation system, Sun Bandit PV-Based Solar Hot Water System, induction range.
Certification: Energy Star for Homes, HERS 47. Other: Deltec pre-cut wood ceiling, Classic Metal shingle roof, (copper penny color) Frameguard Total Mold and Moisture resistant treatment, built in floor to ceiling bookshelves, dividing walls that stop short of the ceiling for a true open and airy feel.
NOTABLE BUILDS
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A charming, 1000-square-foot bungalow, located in a vibrant infill lot in Asheville, featuring air-tight construction, mini-split heat pumps, heat pump water heater, solar electric array, and a mountain view.
A beautiful 1500-square-foot NC Green Built Certified home in a mountain community requiring
green certification on every home.
A high performance, passive solar project in Indiana with a floor plan modeled after our own Model Home and Innovation Center. The owner of this 1496-square-foot sustainable home was also the builder.
Deltec’s first Solar Farmhouse. This sun-tempered home deep in Black Mountain, NC features a mini split heat pump, heat pump water heater, and super-insulation. With a projected HERS score of 47, these homeowners’ goal is to achieve Energy Star for Homes Certification.
NOTABLE BUILDS
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