Habitat for Humanity of Kent County, a long time partner but new member of the institute, hopes to complete its first LEED for Homes v4 certified home in the spring of 2015. In fact, this home is positioned to be the first LEED v4 home in Michigan.
Introduced a year ago, LEED v4 is the newest version of the popular internationally accepted accreditation program, offering new categories (such as human health and natural resources), time-saving support tools and enhanced opportunities for building performance management.
Located at Oakland Ave. SW, Habitat Kent’s newest project is part of the Grand Rapids Community College 100th anniversary build. The majority of the home will be built by students studying green construction in the GRCC Tassell M-Tec program. This home, which started in August, is one of three homes that M-Tec students will partner with Habitat Kent to build this year.
- Cutting-edge water heater designed to improve efficiency through a closed combustion system that pulls fresh combustion air in from the outside – eliminating the need for a fresh air intake
- Extremely tight and well-insulated house envelope to save in heating costs
- Additional testing measures, including pre-drywall, infra-red camera testing and blower door tests, to help ensure quality of the thermal envelope
The GRCC students have been eager to learn about sustainable design and the LEED for Homes program. Working on this house provides them the opportunity to understand efficient building practices that go beyond a typical code built home.
“We purposefully chose a GRCC build to be our first LEED v4 home because of the commitment of the GRCC M-TEC programs to sustainable building practices,” said Brandyn Deckinga, Habitat Kent project manager. “As with any LEED-certified building, the partnership with all trade contractors, material suppliers, energy raters and others is vital in the overall success of the build.”
Jamison Lenz, GHI program manager has been working with the students to meet the LEED V4 train the trades requirements and helping them understand many components of a LEED home through on site and classroom education.
To keep up to date with the build, connect with Habitat Kent on Facebook.
This home was constructed with environmentally friendly materials and products. The goal was to build a home that didn’t have a negative impact on the environment and would contribute to the home’s overall efficiency.
The result is beautiful home outfitted with natural bamboo hardwood floors, geothermal heating and cooling, superior insulation and Anderson Triple Pane Windows. The house’s construction, due to its part being pre-fabricated offsite, diverted almost all waste from landfills.
The home has greatly reduced utilities due to its design, costing $150 a month or $1,700 a year due to temperature moderation, Energy Star certified ceiling fans in all rooms, water conserving (Water Sense) faucets, and low flow 1.28GP toilets.
This home utilizes geothermal heating and cooling, which brings up 55 degree air from the earth’s crust, to effectively moderate the home’s temperature. The house also has Structure insulated panels (SIP) installed for throughout the entire house, reducing the amount of onsite wastes and greatly increasing insulation. The Kitchen, Foyer, and Great Room, all have insulation with an R-value of 40, while all other rooms are at R24. The attic, garage, and roof have an insulation of R40, but utilize spray foam insulation.
The Superior Wall Foundation was precast in Michigan with moisture resistant 5,000 psi concrete and placed on crushed stone footing to redirect water away from the foundation. The foundation itself also includes R17 insulation to further reduce air leakage in the home.
Due the concrete foundation and sealing of cracks and joints in the foundation, the house has good protection against pests like termites. The house also has a significantly reduced air leakage envelope, which is rated at 5.0 air changes per hour at 50 pascals (5.0 ACH50) All ducts were installed in conditioned space, so there is no leakages withing duct work. The lawn consists of “No Mow Grass” which does not require fertilizer, mowing, or watering in its maintenance.
Key To Success
Air Filtration MERV 10
Roof Insulation Value R40
Insulation SIP Channels: R24
Reduced Envelope Leakage of 5.0 ACH50
Natural Bamboo Flooring
Photos courtesy of Ihab Riad, Green Park Construction, LLC.
recently partnered with Michigan State University (MSU) to perform a Post-Occupancy Evaluation (POE) of 235 LEED-certified homes in the Midwest, and we are pleased to share the results. The goal is to identify the homes’ actual performance after people moved in, and also the
benefits and shortcomings of the current LEED for Home certification system. The survey consisted of various categories including (1) general satisfaction with the LEED-certified home, (2) satisfaction about the home in general and various aspects of the indoor environment, (3) overall well-being including the health impact, (4) energy efficiency and building performance, (5) the environmental behavior of residents, and (6) demographics.
The findings of this study revealed that most residents of the LEED-certified home were satisfied with their home and their quality of life in their home.
- 1 GBCI – General
- 1 MI Contractor (Code & Green)
- 1 MI Architect
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Two methodological approaches were used for this study. Qualitative case studies were conducted with 15 LEED-certified Habitat for Humanity residents in Kent County, Michigan through in-depth interviews, observations, and IEQ measurement. 16 % respondents came from LEED-certified Habitat for Humanity homes in Michigan. These residents in particular, were more satisfied with their homes and their quality of life than residents of Non- Habitat homes were, although their satisfaction with their neighborhood and specific aspects of home environment (e.g., space layout, size of space, finishes, visual privacy, view, temperature, humidity) was lower than that of Non-Habitat residents. Residents of the Habitat for Humanity tended to perceive the improvement of their quality of life since moving into their LEED-certified home more strongly than residents of the Non-Habitat home did. They were also more satisfied with energy efficiency of their home than residents of the Non-Habitat home.
Promote sustainability in low-income housing: More programs should be developed that can offer incentives for participation in LEED green building certification programs and increase funding opportunities to cover the initial costs of sustainable home building for low-income families at both state and local levels, because those efforts will produce long-term economic and environmental benefits.
Improve the design of low-income green housing: Architects, designers, engineers, contractors, and facility managers can gain greater understanding of design and the performance of low-income green homes with the findings of this POE project by receiving feedback for the future projects. Although the houses were LEED-certified, some problems in maintaining the green features, building performance, and comfortable home environment were identified. Architects, designers, engineers, green policy makers, and Habitat for Humanity Affiliates should pay attention to the specific needs relevant to these issues to improve the design quality of low-income green home through the process of planning, design, and construction.
Implement Post-Occupancy Evaluation (POE): More extensive implementation of POEs is critical. Since LEED certification is based on “as-designed” performance, further implementation of POEs is exceptionally important to verify actual performance and expected performance. In particular, since there is no mandatory post-occupancy evaluation process included in LEED or other green home certifications, there is no empirical data to verify whether these green homes perform satisfactorily in terms of heating, cooling, or indoor environmental quality.
Contribute to the general body of knowledge: Although there is a consensus about the benefits of green homes, few empirical studies about the actual effects of LEED-certified green homes on residents’ health, comfort, and satisfaction have been conducted. The findings from this study therefore increased understanding of the benefits to be gained from LEED-certified low-income homes by applying empirically tested, research -based knowledge.
Promote public awareness: This report will educate the public about the impact of LEED-certified homes on (1) improving the residential environmental quality and energy efficiency, (2) reducing residents’ health risks and (3) enhancing residents’ comfort and satisfaction by disseminating the results of this research at conferences and by publishing articles in scholarly and extension journals.
Make a Policy Recommendation:
1) Incentives for green homes, such as LEED-certified homes, Energy Star Homes, or National Association of Home Builders’ Green certified homes, should be offered to developers, contractors, and homeowners. This will be critical for both new and existing homes located in the cold regions such as Michigan to encourage energy-efficient green home constructions for low-income families in order to offer lower utility bills.
2) Policy makers should collaborate closely with local builders and developers to apply more green home features to new or existing low-income houses. Certain types of incentives for local builders and developers are desired.
3) Post-occupancy evaluations of green certified homes should be encouraged, particularly for low-income housing. Continuous efforts should be made to save energy and keep green homes energy-efficient for these households and homeowners.
4) We suggest conducting POEs of green certified homes in five or ten years to preserve their green features and energy efficiency. Based on the POEs, the homes may or may not be repaired to keep the original functions of green features. In the POEs and repairing process, local home remodeling companies can be involved. Some incentives should be considered for the local companies or businesses to be involved in this green process if they are small or micro businesses. Tax reductions for these types of companies (i.e., energy auditors, window replacement companies) can promote small entrepreneurs working on sustainable housing projects in local communities. This can create more local jobs.
5) We suggest offering regular educational seminars for residents of green certified homes in order to offer precise information about the green features of their homes and educate them how to keep their homes green. On-site seminars can be offered one or two times in the development phase and right before the new owners take occupancy. Once residents move to their new homes, it is recommended to send flyers via mail or email to remind them of the green features of their homes and inform them of how to use and maintain these features. Mailed or emailed flyers will work better than on-site seminars because many residents have full- or part-time jobs.
6) In addition, incentives should be considered for upgrading low-income housing to make it more energy-efficient and environmentally friendly. Currently there is a 500 dollar maximum tax credit for upgrading any housing features to make them energy-efficient. This maximum should be increased to keep up with the real cost of upgrading energy-consuming HVAC systems to energy-efficient ones. In particular, more aggressive incentives should be offered to households below a certain income level so that homeowners can be more active in upgrading their conventional houses to energy-efficient green ones.
Thanks to the Michigan Applied Public Policy Research (MAPPR) Grant from the Institute for Public Policy and Social Research (IPPSR) and Michigan State University (MSU) who worked with to perform this Post-Occupancy Evaluation (POE).
See more details on a similar LEED Pre-Occupancy Report.
Using his home building expertise, Brian Bosgraaf started Cottage Home in 2000 specializing in building custom homes along Lake Michigan. Cottage Home has designed and built more than 70 custom homes along the West Michigan shoreline, including 13 LEED certified homes. In an interview with Brian, he expressed his passion for LEED certification and sustainable construction practices.
When Brian and Jeremy vanEyk (Vice President) were asked about their commitment to building LEED, they responded that Cottage Home is committed to utilizing healthy, affordable, efficient, and durable construction practices that are already above code, energy star and even LEED at times. Brian says he considers LEED only one of the many tools in his toolbox. Other such tools include creative design, customer service, careful selection of materials, and creating a sense of place. In order to make it simple for the customer, Cottage Home uses a fixed price prior to starting construction which already includes LEED qualifications. This allows some of the cost of LEED certification to be absorbed by both the customer and through the Cottage Homes marketing budget. Brian believes this method works due to his design and construction teams working together throughout the construction process, which creates a feedback loop that fosters constant improvement. Including LEED certification into the final cost helps facilitate more sales than presenting each option with separate pricing.
Since many homeowners today are educated and concerned about sustainability and environmental issues, many take time to study the details of LEED on the website of Cottage Home and take comfort in knowing LEED is a third party certification. Clients are aware of LEED’s achievements and credibility, and often wonder about how changes to the house affect the LEED certification level. Much of Cottage Home’s customer base is from the Chicago area where LEED is prevalent in their office buildings, and a result, many clients have experienced the advantages offered by LEED construction firsthand. These clients have often already invested in commercial LEED projects and are now ready to transition these same high standards to their personal lives. Jeremy decided to experience the benefits of LEED firsthand and chose to have his own house in Zeeland, certified LEED Platinum.
Building on the lake front comes with complications such as extreme wind loads, humid changes, temperature fluctuation, and other variables. To overcome these challenges, Cottage Home uses high performance home measures to control the entire process though design, build, and some maintenance which allows more control of green features. Cottage Home designs and builds what is right for each particular home which may result in homes varying in different HVAC, insulation, passive solar heating, and various climate control systems. One particular feature that is commonly used in these homes, including Jeremys, is an ERV (Energy Recovery Ventilator). An ERV automatically exhausts stale air from the inside of the house and replaces it with fresh air from the outside. Another key feature used in many of the homes is a geothermal system. There are a few different types used, but all contribute to the energy efficiency of the homes in some way. Several techniques are used to increase water efficiency in the homes, such as tankless water heaters, which only heat water when necessary, water collection systems to help with sprinking and irrigation, and faucets and showerheads that work with less water than traditional ones. Insulation, as well as materials such as flooring, home furnishings and walls are all aspects that need to be carefully considered when building these homes.
As leaders in the industry we asked Brian and Jeremy what they saw in the future of design and construction. Jeremy believes that being able to evaluate the effectiveness of high performance systems and insulation through energy bills is important. Along with water collection systems to reduce storm water runoff and help irrigate the lawn. Brian agrees that we should have a system to allow clients to ensure they are getting the most effective homes. He foresees homes that can be manipulated to meet the client’s needs at any given time. An example of this would be homes with the ability to accommodate a family of four, which can then transition to accommodate sleeping arrangements for twenty. Along with being able to better meet a client’s needs, he would like to see energy loads distributed to only sections of the house in use, as well as the ability for clients to control how energy is used throughout the home (on site and from satellite locations). Cottage Home sees one challenge to moving forward with these ideas is getting sub-contractors to approach basic air sealing, insulation, proper HVAC sizing, and design aesthetics with an effective mindset. Cottage Home has established themselves as innovators and leaders in the design of luxury LEED lake front homes. They continue to partner quality, design and the environment hand in hand to produce sustainability along our beaches.
Quick Numbers – Average HERS Score 51 Average LEED score 75
Learn & see more about their LEED projects below.
Many states are in the process of adopting in whole or with modifications the 2012 International Energy Conservation Code (IECC). This new code raises the bar in construction design for residential and commercial structures, and as a result, architects / engineers / contractors building to the new code will be affordably offer a choice to their clients for pursuing several above-code certifications such as Energy Star and LEED without too much additional effort or cost.
The new national energy code includes mandatory blower-door testing for building air leakage (less than <3.0 ACH at 50 pascals), which will measure how well contractors have sealed up penetrations between the outdoors and indoor conditioned space. This testing will be required for all projects permitted after the new code goes into effect. Some states have made modifications to the adopted code, such as Illinois which has changed the ACH rate to 5.0 ACH @ 50. View our archived July 12 webinar to learn more about IL Energy Code changes.
Other aspects of the 2012 IECC such as requiring hot water pipe insulation and mechanical ventilation are new items that projects will need to implement. Learn more on a free webinar held Thursday July 12.
So, how do national IECC 2012 requirements relate to voluntary above-code programs like Energy Star, LEED and Passive House? Pretty well actually. has assembled a matrix identifying several energy-related items as written in the code and indicated what the impact or requirements would be in one of these above-code third-party green certification programs. Download national comparison matrix as PDF.
(Illinois-specific modifications are shown in the image below)
What does this mean? Well just by building to the new code, these projects will be very close to meeting the Energy Star for Homes program requirements, and will score very well in programs that require Energy Star version 3 such as LEED or Green Communities. Other green programs that don’t require Energy Star, such as National Green Building Standard or local green home programs will also heavily reward these projects.
LEED for Homes will be requiring Energy Star version 3 beginning at the end of the year, so right now a project can still earn LEED certification by building to Energy Star version 2 requirements which should be easily met on any home that meets IECC 2012.
Take advantage of this sweet spot and earn market recognition by attending a LEED workshop or sign up to earn LEED certification today!
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