We reached back out to Sam Pobst to take a look at his LEED Platinum home and he sent us his latest utility bills of energy use vs energy produced. You can review it here.
What we found was that from Aug 13 – Aug 14 he had roughly used about 3,000 KWHe (heating and cooling) of energy over what he produced.
“In our original energy model we had included a solar hot water collector which we never installed. This would have generated about 10% of our total energy requirements for the home, and put us slightly energy positive. I hope to install it one day, but it is not in the budget yet,” says Sam.
We also asked Sam to talk a little bit about the ROI versus a conventional home built in Michigan. He says, “The ROI with all of the technology we implemented I estimate at about seven years. The PV has a payback of three years largely because of the EARP grant, the tax credit, and my labor to install it. The cost premium for the Serious 925 windows over a standard Energy Star window is less than two years.”
EARP or Experimental Advanced Renewable Program is a program from consumers energy where homeowner’s and business owners can be selected to receive almost double the going rate for the electricity sold to the grid.
“I have somewhere around $20,000 invested in the insulation and sealing of the building envelope. I can’t say what the payback on this is because I don’t know what the baseline cost would be for code built construction. This includes all of the insulation, extra framing, and the extra plywood sheathing. Assuming a code built home with 2×6 construction, a quarter of the insulation, and OSB sheathing, would cost at least half this much, I estimate that the payback is around ten years for this. This payback continues for the life of the home which I estimate to be around 200 years if well maintained,” remarks Sam.
Sam’s home was a targeted passive house but he never made it. Below he details how he surpassed some areas of the program but not in others.
He says, “While we did not meet the heat demand requirements, we more than met the air infiltration requirements, and we devastated the actual primary energy demand by over half.”
Heat demand 4.75 6.47
Pressure result 0.6 ACH50 0.44 ACH50
Primary Energy Demand 38 kBTU/ft2yr 17.5 kBTU/ft2yr
“Based on these metrics, and what I heard at the last PH conference, a restructuring of the organizing principles of PH to weigh these three critical PH components to arrive at a score make more sense,” says Sam.
Catch a video about Sam’s project from start to finish, review the profile, and stay tuned to learn if Sam goes Net Positive.
Akron Summit Community Action, Inc. (Akron YouthBuild) partnered with Saint-Gobain through the Saint-Gobain Corporation Foundation with support from the Saint-Gobain family of companies, to complete a green renovation at 887 Garfield Street in Akron, OH. Saint-Gobain was founded in 1665 to manufacture glass for the Palace of Versailles in Paris, France. They are the Worlds largest building materials company. Recognized as a 2009 & 2010 Energy Star partner of the year by the US EPA, Saint-Gobain earned the 2011, 2012, & 2013 Energy Star Sustained Excellence Award, the highest level of recognition for outstanding contributions to protecting the environment through energy efficiency. The YouthBuild program started in 1978 in East Harlem, New York. The program concentrates on youths aged 16-24 who work full-time for 6-24 months while working toward their GED’s or High School Diplomas while at the same time learning job skills by building affordable housing in their communities.
The Garfield Project is the first YouthBuild Akron home to achieve the prestigious LEED Platinum certification. Saint-Gobain and its family of companies have donated a range of building materials and many hours of on-site support from CertainTeed Building Scientists to complete the green home renovation. The home features a heat recovery system and very efficient CertaSpray Closed Cell Foam Insulation which contribute to its energy efficiency. The home received a HERS score of 65 meaning that it is 35% more efficient than other comparable homes. In addition to energy efficiency measures the home incorporates several landscaping features that reduce it’s irrigation needs. For example, drought tolerant plants were installed along with a slow-growing grass that needs no fertilizers, little mowing, and relatively little water. The home harvests rainwater from its roof. These aspects have accumulated a 59% water reduction due to the sites landscape architecture alone.
CertainTeed (an affiliate of Saint-Gobain) donated many of the building materials. These materials contributed significantly to the overall efficiency and sustainability of the home. Grenite Engineered Stone Countertop’s were used and constructed with up to 85% post-consumer recycled content. Air-Renew Gypsum Board boasts industry only technology that removes VOC’s from the air and converts them into safe inert compounds, once they are captured in the board they cannot be released into the air. This Gypsum Board also aids in the reduction of moisture and mold. On the rooftop, LandMark Solaris – Solar Reflecting Roofing Shingles were utilized. They reflect the suns rays and reduce roof temperatures up to 20%.
Saint-Gobain & YouthBuild Akron (Garfield House) – PDF
This home located on Elm St. in Indianapolis, IN was an abandoned space, built in 1910, that was bid on for redevelopment through the Southeast Neighborhood Development (SEND) organization’s Transfer and Transform program, which seeks to reinvigorate the community
“William Wagnon of Green Path Homes had been looking for an opportunity to do a LEED Platinum certified redevelopment on a house that could serve as an example of green building for contractors, home owners and a city in need of sustainability.” The house on Elm presented a perfect opportunity to showcase the economic viability of a green project as well as its added health and enjoyment benefits.
No subsidies or donations were taken to help the project along. “We wanted to do it as a market-rate project so that nobody could make an excuse for not doing it. That’s the point I wanted to make,” Wagnon said.
“The house now features around $7,000 worth of insulation, putting the home’s heating efficiency well-above most standards. The floor plan was changed to allow for a contemporary living style. Raised ceilings and other space improvements provide for maximum storage in the home. A rain garden now sits at the front of the house fed by a drain pipe from the roof. The backyard deck looks out onto a single-car garage, raised planters for growing vegetables and a patch of lawn.” Additionally, 100% of installed plants were drought tolerant further reducing irrigation needs. In total, the outdoor water savings plus the water savings due to the indoor installation of highly efficient faucets, showers, and toilets etc. results in a monthly water savings of 69% based on total water use. We were able to utilize the V4 Homes Workbook: Water Reduction Calculator to derive this number. A copy of the information is attached to the project profile at the bottom of this post.
The small 960 sq ft. 2 bedroom 1 bath home is located in an area with outstanding access to community resources such as public transportation. This well sealed home uses energy efficient appliances and is expected to save 47% on energy bills. Insulated piping adds to the efficiency of this home.
A central HVAC system equipped with an additional dehumidification mode adds to the health of the home along with the use of hardwood with a preference for FSC certified woods.
So much care was put into this home on Williams blog he writes … “Walter, who has does the exterior sheathing, rigid foam insulation and now the siding work is putting flashing tabs behind each butt joint on the siding. These joints will all be caulked, but it’s just a fact that caulk fails in a couple of years. But with the flashing tabs, any water that penetrates is redirected right back to the outside.
Brad nailed every shingle of the roof by hand. Yes, it takes much longer, but he knows each one is set. In building the soffit end caps, he cut fairly complex pieces so it could be 1 piece of solid wood, instead of having multiple joints that would require caulking.”
This project was the first residential home in the area to achieve the prestigious LEED Platinum certification.
News Post Featuring this Project
Green Path Home Website and Blog
“This $28.5M project involved the construction of two new student housing buildings for Central Michigan University’s (CMU) graduate school. Hoping to emulate apartment living to attract the students who might otherwise choose to
live off-campus, each unit includes private bathrooms, kitchens and laundry facilities—with a mix of one, two and four bedroom units throughout the two structures, with 164 beds total between the two buildings.
The buildings were designed to emulate the Gothic architecture present on campus and the design and construction teams ensured that LEED sustainable features incorporated into the design were properly integrated. Large windows
were added to provide occupants with daylight in regularly occupied areas. A campus-wide green housekeeping program was implemented. Regionally manufactured materials containing recycled content were used extensively throughout the project. Equipment was selected to ensure that refrigerants would cause minimal damage to the atmosphere. Additionally, all HVAC and electrical systems were commissioned and certified that they were installed per specification and working as designed. The design also limits disruption of natural hydrology and all but eliminated pollution and contaminants from stormwater run-off. Universal design practices and sustainable design measures were integrated into the design to create an energy efficient complex recognized by its tenants as a great place to live and by the community as a model for sustainable living, earning the coveted LEED for Homes Platinum Certification.
The pedestrian scale buildings support CMU’s and the City of Mount Pleasant’s mutual goal of a walkable community. The new Graduate Housing units are located on the north end of campus on Bellows Street, just steps from the Health Professions/College of Medicine building and close to Mission Street as well as downtown Mt. Pleasant.
The landscaping was designed to require 50% less irrigation, reducing the use of potable water. In addition, a 33% reduction in potable water and sewage usage was achieved by careful selection of water efficient plumbing fixtures, faucets, and flush valves.
The overall energy performance of a new building can not be measures until after the building has been built. Thus, the energy performance of a building must be predicted using energy analysis software. The Residential Energy Services Network has developed a set of guidelines for accessing the relative energy performance of these units. Commissioning of all HVAC, lighting and domestic water systems were conducted to ensure that all systems operate as designed. All equipment was selected to cause minimal damage to the atmosphere.
MATERIALS AND RESOURCES
During construction, 94% of all construction waste was reclaimed and recycled. Sources for the building construction materials were evaluated, recycled content materials make use of materials that would otherwise be deposited within landfills. The use of local materials support the local economy and reduce the harmful impacts of long-distance transportation.
INDOOR ENVIRONMENTAL QUALITY
An indoor air quality (IAQ) plan was implemented and low-emitting materials were selected in order to reduce any adverse effects on the IAQ once the building was occupied. The HVAC system was designed to meet the minimum IAQ requirements. No smoking is permitted within 25 feet of any air intake louvers. Low VOC (volatile organic compound) materials such as paints, carpets, sealants, adhesives, and casework were employed in order to provide a healthy indoor environment. The HVAC system was designed to maintain temperatures and humidity in accordance with ASHRAE standard 55-2007.”
The Christman Company – Builder/Contractor & Neumann / Smith Architects
Thanks to Jetson Green for sharing this awesome post! (Article written by Christine Walsh on Nov. 28, 2013)
Architect Virge Temme of Sturgeon Bay, Wisconsin recently received the LEED Platinum for Homes certification for a private residence she designed near Gills Rock. The home was built by Bay Lakes Builders, and the plans were based on the collaboration of all members of the construction and design team so as to ensure proper integration of all systems. The electric and fuel bills for this 2,600-square-foot house were less than $30 per month on average during its first year. This is only the seventh home in Wisconsin to receive the LEED Platinum certification.
The building process started with the excavation of the meadow where the house stands, while the top soil was stockpiled and used for final grading later. Once the foundation was complete, the foundation forms were stripped and the below-slab plumbing and electrical runs installed. The builders continued with laying thermal tarp to protect the home from freezing rains. This was followed by the installing of under-slab insulation. All the joints were staggered and sealed in this process to prevent air movement between layers. Furthermore, all the penetrations through insulation were foam sealed, which protects against cold seepage and potential Radon gasses.
The roof was then installed, using 16″ I-joists to reduce thermal transmission and to provide additional insulation depth. The I-joists were placed directly over the studs below and the framed walls with studs at 24″ on center to reduce redundant top plate, which also reduced the overall framing materials need. The rafters were then screwed and strapped to studs to provide additional protection from wind. All the intersections were then foam-sealed.
To provide a continuous envelope 3/8″ OSB was added to the under side of rafters. Double 2-4 plates were screwed below the rafters to provide an electrical chase, eliminating the need for roof penetrations. The builders also used ladder framing, which greatly reduced the amount of redundant materials at wall-to-wall connections. Double-wall construction also eliminated thermal bridging and provided space for additional insulation.
The house has insulation values of R-45 for walls, R-60 for the roof, and R-30 for ground insulation. Together with passive solar orientation and specially-coated windows to introduce solar warming, and which also feature overhangs to protect from summer over-heating, there is no need for a furnace or a boiler for space heating.
Other sustainable features of the home include:
– Sustainably-harvested framing materials
– Recycled/recyclable metal siding, roofing and insulation
– Drought-tolerant plants replanted around the home
– Rain gardens for roof runoff
– Only low- or no-VOC paints, adhesives and insulation were used to ensure better air quality
– Floors are made of concrete and sustainably harvested bamboo
– Only highly efficient appliances, lighting fixtures, and plumbing were installed
– The building process resulted in almost no construction waste
Article tags: alternative energy, Development, energy efficiency, green building, LEED,leed certification, LEED Platinum, modern architecture, modern design, passive house, residential, water efficiency
The “Glenn Retreat” project exemplifies water use reduction both outdoor and indoor, with a 72% reduction in irrigation due in part by
the AdvanTex(R) Wastewater Treatment Systems manufactured by Orenco (R) that is a environmentally sustainable wastewater treatment technology that treats blackwater and greywater so well that the treated effluent can be re-used for subsurface irrigation (We achieved a additional LEED innovation point with this system). Along with Infiltrating Rain Gardens, Edible Forest Gardens, Extensive use of Native Drought Tolerant Plants and Eco Turf Grass on the outside and with low flow WaterSense certified toilet and fixture on the inside this project achieved almost every point under Water Efficiency in the LEED for Homes checklist. Our approach to handling waste water and storm water turned a negative attribute into a positive one; and created a drought tolerant and low maintenance landscape.
The site’s soil composition has high clay content, and coupled with a high water table makes for a less desirable building site. Fill dirt and sand were added to the center of the site to elevate the house a few feet above grade. Drain tiles and French drains were installed around the house to channel water into swales and rain gardens which we developed along the north, east and west property lines. This watering system has proven sufficient to support the wide variety of plant life added to the property. Our system eliminated the painstaking task of cleaning rain gutters too because we didn’t need to install any. The high water table also presented a challenge for the septic system. We selected an advanced system that uses a smaller drain field, and generates effluent certified by NSF International for subsurface irrigation. A native wildflower and prairie grass landscape is being developed on the septic drain field. Key Features Fabral Metal Roof (Energy Star) Exterior Construction is Advanced Framing @ 24″ o.c. 8″ of Agri based Open Cell Foam Insulation in attic. (R40) 4″ Ridged Foam Insulation under the Slab. (R-20) 3″ of Agri based Open Cell Foam Insulation on interior crawl space foundation walls. Exterior walls are Air Sealed with 5″ Cellulose Insulation (R-22) with 1″ Dow Styrofoam SIS Sheathing (R-5.5). (stops Thermal Bridging) James Hardie cement board siding. (with recycled content) MiraTec trim. (formaldehyde free, SCS Certified) 93% of Construction waste was diverted fro the landfills.
Beacon Springs: The Vision
Beacon Springs (Near Ann Arbor) offers hope for life springing from a sustainable dwelling, polyculture gardens amid oak savannah, and a lively gathering place. It is a beacon of hope for a happy, healthy and sustainable future for all.
Our house at Beacon Springs is named Burh Becc, meaning, in Old English, a dwelling by a creek. This is the origin of our family name Burbeck. Several natural springs on the north edge of the land feed a small creek which runs past the house. Wildlife is drawn to this source of water and vegetation, as were we when we first came to the site. Burh Becc has been designed as a “living building” using the Living Building Challenge standards of the International Living Future Institute (visit living-future.org). A living building becomes an alive component in a sustainable ecosystem, integrated with the natural environment in a way that nurtures and sustains that environment. It is because of this living nature of our house that we have given it a name, and we have designed and built it to serve many future generations.
Water. Our living building uses the rain and snow falling on the roof as its only source of water.
Energy. Burh Becc depends on the rays of the sun for most of its energy needs. Heat is provided mainly through passive solar design. Natural ventilation is provided by the wind drawn through the house by the tower design. Heating and cooling are augmented as needed by a photovoltaic-powered geothermal system.
Waste. Our house is designed to reduce waste products that need to be removed from the site and eliminate materials toxic to human or environmental health. 95% of the by-products normally considered waste are integrated back into the site ecosystem, or are recycled, repurposed or reused by the broader community. A 95% materials efficiency standard was also followed during the construction phase of Burh Becc, leaving only 5% for the local landfill.
Farm amid oak savannah
The farm at Beacon Springs produces food for the local community, particularly those with limited access to fresh produce, as well as for our own table. As with the house, the farm has become an integral part of the ecosystem. Following the principles of permaculture, plants, trees and animals work together for abundant and sustainable production of food. These permaculture methods also restore the fields depleted through decades of “factory farming,” they allow the garden farm to fit together with the rejuvenating oak savannah, and they encourage wise management of water for the benefit of the immediate site and neighboring ecosystems.
Our home has become a wonder-filled gathering place for people (and pets, too). The embrace of Beacon Springs – the living building, with its flourishing courtyard and barnyard animals, combined with the surrounding acres of permaculture gardens and oak savannah – is a balm to the lone poet and a catalyst for lively exchange in larger groups. Beacon Springs is a center of education for the community: architecture students learning about sustainable design; residential building crafts(wo)men and trades professionals learning sustainable construction methods; children learning about barnyard animals and bee-keeping; and permaculture enthusiasts participating in onsite workshops. Beacon Springs also provides a gathering spot for community farming. And we regularly welcome family, friends, co-workers and others to our table for good food and dynamic exchange of life.
A special note for our team of designers, engineers, builders and growers, and the extended team members through the International Living Future Institute: We hope that each of you, in joining the community responsible for the creation of Beacon Springs, has also received an extra measure of life springing from your contribution to the project. You are always welcome to come for a visit, enjoying with us the fruits of your labors.
—Tom and Marti Burbeck, Ann Arbor, Michigan, March 2023
Photos and Info taken from http://www.beaconsprings.org/
* correction – This is a new home and not a rehab.
The approach was a LEED certified home that goes beyond most Habitat standards of just LEED silver and Energy Star Version 2. The goal was to get a house to achieve the coveted Energy Star V. 3 certification and Indoor AirPlus certification by achieving higher standards for the HVAC. The biggest hurdle for this house was installing a 95% efficient furnace coupled with an ERV mechanical ventilation system and flexible ducts in order to reduce energy costs and improve air quality throughout the 2-story house. The kitchen is outfitted with low VOC cabinets and a 100 CFM range hood which vents directly outside as opposed to in the attic or re-circulation.
The Indoor airPlus certification contributed largely to the Energy Star V3 Certifcation, as the higher quality HVAC system also covered many of the prerequisites. The biggest hurdle for this home was to find a credentialed HVAC installer who would work with the higher standards required for Indoor airPlus. The water heater and furnace directly vent fumes outside and improve indoor air quality and efficiency of the equipment. The HVAC also has a MERV 10 rated filters and efficiently at 86 CFM, which fully circulates the air in the home approximately every 4 hours. The furnace itself runs on a single speed PSC motor which runs at set intervals and uses the ERV to moderate the temperature. The house also features a Superior Wall Foundation which contributes an R-Value of 5 to NuWool insulation installed on the walls for a total R-Value of 26. To further increase the insulation of the house the rim joists were also insulated and earn an efficient .3 U-factor windows were installed to reduce air leakage.
The home appliances available in this house are Energy Star certified to accompany the Energy Star V3 certification on the house. Outfitted with low formaldehyde pressed wood materials in flooring and cabinets, as well as low VOC paints and finishes on the cabinets and walls. . Plumbing is outfitted using PEX piping as more flexible and reliable alternative to PVC or copper piping.
Habitat for Humanity Kent County is committed to 100% LEED Silver Construction and has saved homeowner’s $1,000 a year in utility costs as well as improved their indoor air quality compared to living situations they were previously in.
Green Home Institute
PO Box 68164
Grand Rapids MI 49516
Tel: (616) 458-6733
Toll Free: (888) 533-3274
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