Rural Homes can be Green too!
Thanks to our in kind sponsor Building Efficiency Resources to make this possible!
Sometimes in the Green Building world we look to the urbanization of homes and buildings to improve location efficiency and give the benefit of community connectivity. Often times we may view homes that are suburban or rural to not be green because of the dependence on the automobile to access resources that are often times miles apart. We know of course that when purely looking at energy, a more rural built home still can meet or even surpass an existing urban home by taking a few more extra energy additions to offset the use of vehicle miles. We also know that more energy is used in homes vs the average consumer vehicle and so there are many opportunities to build better and make up for this.
When MI’s first GreenStar Certified Gold Home was completing their certification they found that their site and community impact score was just a few points shy of gold, mostly due the fact their home was located in the middle of the woods in the Manistee National Forest. In contrast we found the energy score of the home to be surpassing gold requirements greatly. The team made a request to see if their energy score that resulted from a HERS 16 and both solar pv / thermal could be a justified trade off for the energy the average family would need to access resources in a more rural area. The GreenStar tech committee and review (Marc Sloot) got to work right away investigating the opportunity.
The goal of the research was to determine what the average family in the average vehicle travels per year in an area identified as rural and then determine what the predicted energy usage of the HERS index is per point and find a way to offset a better HERS index for a trade in SC (Site & Community impact) points.
Researching data on energy used in vehicles for rural families was easy but determining energy usage per HERS index point was not. The HERS index score is not meant to necessarily be something that predicts energy use directly but rather something to compare differently built to code homes. We reached out to Building Efficiency Resources (The BER), one of the leading HERS providers in the country to see if they would help us extrapolate data. This data would includes HERS index, square feet, climate zone, remrate predicted energy usage and number of bedrooms. Eurihea Speciale, founder and principal was gracious enough to provide 550 sets of data for Midwest homes and the Neighborhood Energy Connection (NEC) in St Paul MN provided another 50 but was skeptical we would find a correlation between HERS and energy usage.
Marc Sloot and the Tech Committee were able to come up with somewhat of a comfortable number that showed a reasonable energy usage prediction per verified HERS Index point and while there were many outliers it served the purpose we needed. After some deliberation the team was able to determine a good set of rules for more rural projects who achieve advanced energy scores and low HERS ratings.
GreenStar Exchange of HERS index points for SC points:
—> People can exchange 3 HERS index points for every 1 SC point on the GreenStar checklist up to 10 SC
points.
—> SC points gotten in exchange like this plus SC points they already have for measures 1D-3 + 1D-4 + 1D-5
cannot exceed 13.
—> Actual HERS index + HERS index points given in exchange cannot exceed 75.
This request can be submitted any time before certification via the greenstar waiver form on the checklist.
Interestingly enough because of this research the tech committee thought maybe utilizing the HERS index score as their energy performance pathway may not be the best approach. The next goal of the committee is to instead utilize energy (KWHe)/year/square foot/bedroom to determine a more fair score. This would also open up the use of more tools such as REMrate (without HERS), Passive House modeling and the use of existing home tools such as the DOE: Home Energy Score and Cake System Systems – Residential Energy Performance Score. Thanks to the tech committee for their flexibility and understanding. Anyone using greenstar is open to work with the committee to find something that makes sense because the idea of a greenhome is evolving and should not be a set of rigid and unchanging principals.
Stay tuned in 2015 for more on this research and an update to the energy performance pathway in GreenStar.
Development to complete renovate the townhomes.
h third party review of the design and energy/hygrothermal modeling of a project as well as a third party verification of the actual implementation on site through expert trained PHIUS+ RESNET Raters. A successful project earns the PHIUS+ Certified passive house or building plaque/certificate as well as the DOE Challenge Home and Energy Star labels.
Recorded 1 Hour Webinar on the entire project – 1 AIA/GBCI 
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
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.
