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How is our education manager aiming for Aiming for Zero Carbon Certification

See the photo above. I worked with www.wattcarbon.com To determine the 2022 carbon impact on my home and most of my travel. Determining carbon is more complex than just a straight conversion of utility bills like in the past. The reality is our larger grid operators are using different amounts of energy sources, causing carbon outputs at different times of the day. Therefore in the photo, you can see the lighter colors are more carbon-intense times of the day on average throughout the year, and the darker ones are cleaner. Each grid is going to be different. I am on the MISO Grid, which is fairly dirty, and still has a lot of coal.

So I plan to continue offsetting my carbon usage to be GHI Zero Carbon Certified for 2022 and the proceeding years. The other goal is not to invest in meaningless offsets, like foreign renewables or forest blocks that might burn up.

Instead, I am excited to work with Watt Carbon to determine offsets or Renewable Energy Credits from resources generated at the carbon intense times of the day or low-income housing electrification projects whereby there was no other way, say, for example, someone could install a heat-pump water heat. More to come on that later.

The first goal was to upload my data to Watt Carbon to determine this and continue to do so in the future. I am working on a way to automate this. Then it was to reduce consumption and then shift consumption to fewer carbon-intense times of the day, such as in the middle of the day in the summer when I use solar or there is more grid solar, or at night in the winter when there is more nuclear and wind on the grid.  I also purchased three blocks of Consumers Energy Solar gardens in 2022, which is factored into my Watt Carbon number and helped reduce my total carbon load.

More to come soon about what I ended up doing to make the offset. Stay tuned.

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March 23 Sustainability Job Openings

Each Month the GreenHome Institute will post a list of sustainability and Green Home Job openings.

To advanced decarbonization, we need more people going into the trades. There is a big shortage.

Consider going into HVAC, mechanical, electrician, plumber, or builder to help lead the change we need to improve millions of existing homes in our country.

Become a GHI member to get free Green Associate Credential training access. Any going into sustainability should have this credential which is recognized around the globe.

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Vastu Shastra Sanctum GreenStar Silver GHI Zero Energy Certified

“The owners of the Vastu Shastra Sanctum gave us a challenge: a net-zero home with radiant floor heat. Net-zero made this goal difficult due to a severe lack of quality equipment from reputable manufacturers. When most people compromise and use a boiler to heat their floors, the R-Value team utilized an American made air-to-water heat pump, just the 5th in the nation.

But that was not the only obstacle to overcome. Due to the Vastu design principles, the team was left with some significant structural elements, that threatened the thermal and air barriers in key places. For many of these, Insulated Concrete Forms were ideal for the task, and R-Value’s extensive experience with ICF’s was the perfect fit.  Every single challenge the project presented was overcome with creativity and determination.

From the designer, to the engineer, the R-Value Homes staff, and every valued Trade Partner of ours: Thank you for stepping up to the plate to make this incredible home a reality for our clients!”

The home is projected to deliver 3,000 kwh’s per year of solar power to the grid, more than what it uses.

Sustainability Features 

  • -10 HERS Index Rating
  • Air-to-water Air Source Heat pump for hydronic heating, forced air cooling, and domestic hot water
  • .65 ACH of air leakage
    Insulated Concrete Form exterior walls (ICFs)
  • Frost Protected Shallow Foundation
  • Polished concrete floors with hydronic heating on both levels
  • Heat Recovery Ventilation exceeding ASHRAE 62.2 2016 Standard
  • Passive Solar Design
  • 100% electrified home
  • Roof-mounted solar PV system is estimated to produce 15 Megawatts a year
  • 27 Kwh Battery System

Check out more photos and details on Houzz

This home and all homes meeting the GreenStar Homes Certification Silver (v3) Feature these items additional green items.

  • Moisture and wall water leak assessment + repair
  • Plumbing leak and pressure test shows no leaks
  • No gas leaks detected after construction / renovations
  • Test for no CO backdrafting from gas appliances
  • No new supply ducts panned in joists
  • Use at least MERV 8 Rated Filters on Ducted Systems
  • Electric stove OR Range Hood tested to vent at 100 CFM outdoors
  • Carbon Monoxide detectors (can be dual smoke) installed on all floors and near fireplaces
  • Use steel braided hoses or drainpans under washers in or above living spaces
  • Drainpans under tank water heaters that are in or above living spaces
  • 90% LEDs used
  • Gutter system draining away from home or well draining sandy soils
  • Bathroom exhaust fans must be tested to at least 50 CFM or more in each bathroom
  • No radon detected above PCL 4 when tested or system installed
  • New HVAC must be properly sized based on manual J/D or equivalent
  • Moisture resistant flooring in bathroom, kitchen & entry ways
  • Whole Home Fresh air supply provided
  • All fireplaces must have proper ventilation per IAP or No fireplace exists
  • Refrigerant charge test completed on all AC / Heat pumps
  • Instructions created documenting how to operate the home or unit
  • New gas appliances must be sealed, vented or ideally electric
  • Homeowner or tenant trained on how to operate the house or unit
  • DOE Home Energy Score of 6
  • Shower head(s) are under 2.0 Gallons Per Minute (Average) or Home Water Score of 3
  • Bathroom Aerators are under 1.75 Gallons Per Minute (Average) or Home Water Score of 3
  • Toilets are under 1.3 Gallons per Flush (average) or Home Water Score of 3
  • Non paper face drywall backer in NEW shower / tub surrounds
  • Don’t use HVAC during construction – Major remodels and new only
  • Insulate hot water lines or have runs 10 feet or shorter to all lines
  • Paint/caulks/sealants/primers must be certified Low VOC or NO VOC
  • Kitchen must have proper ventilation through rangehood or outdoor air system
  • Well water systems must use on demand softeners when present (Gold)
  • Bathroom controls such as timer/occupancy sensor or humidistat (Gold)
  • Balanced fresh air system installed and working
  • Final Grade Slopes Away from Foundation 0.5 inch per foot for 10 feet
  • If installing new wood do not use tropical OR make sure it is certified (gold)
  • Insulate cold water pipes or keep them out of unconditioned space (Gold)
  • DOE Home Energy Score of 10 on existing or 17.5 mbtu/year of energy (Platinum)
  • Water heating is all electric or solar
  • All space heating is electric or solar thermal
  • All water heating is electric or solar thermal
  • No fireplace indoors
  • Indoor air quality test after construction are at or below the WELL Standard.
  • Home breaker box can fit future solar
  • Certified low emitting or sealed edges on new cabinets
  • Floorscore or Green Label Plus on 90% of new Carpet
  • Tap water filtration added that is appropriate to area
  • Shoe removal space with no carpet at main entry
  • Flush out home for 48 hours after construction activity before client move in
  • Add leaf debris filter to gutters
  • No gas or propane hook up connected
  • Induction or electric cooktop
  • Battery storage system
  • Ability to make blue light free lighting in high use rooms
  • Refrigerator has freezer on top or bottom
  • Low duct leakage or no ducts
  • Motion sensor / dimmer lights in high use rooms
  • Energy Star Dishwasher Installed
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Miner Residence goes beyond LEED Gold to All Electric Zero Carbon Certified

The Miner Residents achieved LEED for Homes Gold Certification over a decade ago, building above even today’s energy code. Yet, they were still determined to go further by going all-electric in their home, buying an electric car, adding solar, and achieving the GHI Zero Carbon Certification in 2020 – 2022. It shows that all homes are a work in progress, and we can always achieve greater sustainability.

Their Zero Carbon Certification, which does not require looking at vehicle usage, was also extended to their electric vehicle usage, which they included in their report for 2 of 3 years.  You can see more details on that here. 

The Miners continue to educate the public about what they did and what others can do by being involved in their local sustainability group and participating in the national home solar tour. One can already see their influence as more solar continues to spring up in the neighborhood.

Learn more about the details of their project here and watch a video tour of their home.

Energy Features

  • 8 Blocks of Renewable Energy Credits from the Consumers Energy Solar Garden Program
  • Induction Cooktop
  • 8.7 kW Solar PV array
  • All Electric as of mid-2021
  • Electric Car Charger and Vehicle added
  • Geothermal heat pump; no fossil fuels used for heating
  • Desuperheater for hot water when geothermal unit running
  • Programmable thermostats in two zones
  • Energy recovery ventilator to condition and filter incoming air
  • Insulated Concrete Forms used for basement and lower walls to improve insulation
  • Sealed wall joints and windows to minimize leakage (highest “blower door” test)
  • 5-Star Home Energy Rating (53 HERS), R20+ in walls, R35+ in ceilings, and sealing
  • Passive solar heating from clerestory windows, which allow only winter sun
  • Low-e, gas filled windows throughout
  • Fluorescent or LED lighting throughout
  • Energy-Star appliances throughout

Resource Conserving:

  • No irrigation in lawn
  • Limited grass to minimize mowing
  • Extensive use of native plants in prairie setting
  • Reclaimed near-brownfield dump site
  • Engineered floor joists to conserve trees
  • Finger-jointed wall studs to conserve trees
  • Floor plan optimized to minimize scraps of lumber, especially flooring
  • Bamboo floors in upper level; concrete floors in lower level
  • Metal siding is made of partially recycled steel and is recyclable
  • Low-emitting paints, coatings and other materials
  • Low volume flush toilets and showerheads
  • Rain barrels to capture water for gardening
  • Wildlife Certified Yard
  • Not-So-Big House design philosophy to minimize resource consumption

The home is located right in downtown Rockford Michigan with great walkability to get to downtown, parks, trails, and many amenities.

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REBAR23

Thank you for joining our session at REBAR GR 23 – Below are some resources for you based on our discussion during the seminar

We are first going to play a game – Which one of these items are more sustainable and why in the photos below? Raffle tickets for the winner(s) of each!

Additional resources we reference for you.

Click to access 2022-realtors-and-sustainability-report-04-26-2022_0.pdf

Click to access Moving-the-Market_-Energy-Cost-Disclosure-in-Residential-Real-Estate-Listings.pdf

Home Energy Sale Disclosures are coming! See an example here https://www.pdxhes.com/

Green Sellers Disclosure form https://www.dropbox.com/s/9zm49lsn0tdk9wp/SellersGreenDisclosureStatement.pdf?dl=0

Click to access SWMRIC-Goes-Green-2.pdf

GreenHome Inspection https://greenhomeinstitute.org/greenhomeinspection/

Continue Learning – https://greenhomeinstitute.org/events/ (Realtor CEUS coming soon)

Join our Green Realtor Committee Eliza.Searles@greenhomeinstitute.org

Join us at the New Home and Remodel Show all weekend – Talk about IRA benefits for your clients at 6 pm on Friday

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Top 5 on-demand green home videos 22

What were the top 5 residential green building videos for 2022?

This year we saw significant interest in our growing GHI residential green building education channel on youtube.

We hit 11,000 subscribers as people are genuinely interested in building better.

Our top 5 most viewed sessions of the year had heatpumps as a clear winner, with 10’s of 1000’s interested in ducted air source heatpump systems that we discussed in 2 different sessions. Next, there is growing interest in rainwater catchment and use for drinking or other water uses. Lastly, it appears more sustainable types of buildings are still huge in people’s interest as both natural buildings and alternative wall and insulation systems, which fell in our top 5.

So what are the top 5 residential green building videos of 2022?

All About Ducted Minisplits – 38k

Basics of Rain Water Harvesting – 30k

Introduction to Fully Ducted Air Source Heatpumps – 27k

Natural Building in cold, wet climates – 16k

Vapor Barrier, do we really need them? 8.5k

You can check out any sessions, anytime, on your time by going to our youtube channel here. Please consider subscribing, as we are updating new videos here weekly in 2023, and you will get an instant update.

If you wish to receive CEUS from watching these videos under AIA, GBCI, BPI, and more, you may consider supporting our work to keep these sessions going and get free CEUS by becoming a GHI member in 2023. Learn more and sign up here

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AprilAire Dehumidifier helps GHI Education Manager stay dry and healthy

I am very grateful to have had my Aprilaire whole-home dehumidifier now for a couple of months, and I want to share my experience with you.  

The system is very energy efficient and has worked well getting out the humid air in my house. Humidity can be an issue in the swing seasons and even in winter when it does not appear humid. Tracking humidity with Awair and SunRADON, LLC has shown me some of the bad water management practices in both my home and the building industry at large. This causes issues that require these systems to run a lot. Even in winter, when it is dry and my whole house AprilAire humidifier is running, I still need the dehumidifier in the basement due to excess humidity!

Brett Little, Education Manager, seen here with his Aprilaire Dehumidifier

My entire home is two stories with a walkout basement, 1,853 square feet, built mostly to the IECC 2012 code with 978 CFM of air leakage. The home has a Panasonic Intelliabalance energy recovery ventilator running 24/7. Usually, I have had it set to 70 – 100 CFM tested to only pull around 93 CFM at full speed. The room with the new Aprilaire dehumidifier is 442 square feet. The mechanical room is unconditioned, not ventilated, and in a half-walk-out basement, half-finished crawl space (not open to the ground). The basement has some poorly installed fiberglass batts in the rim though not air-sealed, and likely a leakier spot in the home. The ducts are now sealed, though but panned through the floor joists. The basement likely has little proper water management foundation practices that were done during the build. The home has no gutters, but, I believe, the house sits on well-draining sandy soil. The sump pit is wide open, and a contractor spotted growth within it upon installation of the dehumidifier. The sump pit was never sealed. 

I have attached some photos of the installation. It was about $200.00 versus $2,000 if they went to duct it. The system is standalone, but I hope to eventually update it to duct out the exhaust air into the HVAC system return or supply. 

First of all, I am pleased with the humidity levels pre-and-post. While they’re not at my target of 40 for the entire home, they are under 50, and clearly, the dewpoint is in a good place. I had turned up our air conditioning about 2° from an average of 74 before the dehumidifier to 76. Overall, for the most part, it’s more comfortable even at that higher rate with the dryer air. The Awair Element sensor is in my living room, as far from the utility room as possible, and you can see pre and post-summer 2022 humidity data.

Whole home humidity Awair sensor before AprilAire was installed

Whole home humidity Awair sensor after AprilAire was installed

Basement Airthings sensor before AprilAire was installed

Basement Airthings sensor after AprilAire was installed

Utility room Airthings sensor after AprilAire was installed

Overall I am very pleased with the humidity and especially dewpoint levels in my home and basement from this AprilAire Dehumidifier. 

The dehumidifier itself shows me when I look at it anywhere from 41 – 43 and so slightly higher than what the Airthings Mold device is reporting that is right next to it. The dehumidifier never shuts off as far as I can tell despite how dry the airthings is reporting that room to be. When I walk into that room, it feels very bone dry. I was concerned about that until I ran an online Dew Point Calculator and you can see the results attached. The pre-data from 2021 is what I estimated the room to be, and while I never sensored that room in 2021, I would suspect that is what it runs from June – Aug, and I know in May, and Sept, dew points were tracked downstairs upwards of 70 on my tempo 2 monitor in 2021. One thing to note about summer 2022 here is it was extremely dry. I noticed significant humidity spikes upwards of 44 in the utility room when we had rare days of prolonged rain events. One day we even broke a record for rain, and the humidity spiked (below) more than I ever saw it. 

With the device running all the time, there has been an increase in our electrical usage. We went from average baseload watts of .5 to 1.1, you can see some videos of my monitors before and after the dehumidifier, and you can see our energy use doubled from June to august (though, to be fair, in Aug, we increased electric car travel). 

The other item with this device that surprised me is how loud it is, nearly reaching 60 DBA. I tested it with my NIOSH app.  I was told this is because it is a standalone and so that rating is right on target with what is expected, and because it is in the utility room, it is not noticeable in the house.

We also confirmed major VOC spikes right after installation in the room and throughout the house, despite our ERV and 2 110 CFM bath fans running at full speed. It likely came from the glue running the condensate but hard to say. Like all new appliances, vent them awhile after installation. 

As time went on, I realized I could maintain the proper dew point as the season when into fall by moving the system up to 50 for the humidity set point. This has saved a lot of energy and still maintains the basement dew point I am aiming for. As you can see by SunRadon monitors, our basement is getting dryer and dryer, but the device is still running from time to time, and now we have the humidifier running because we are starting to fall below the whole house goal of 40, but it is clear that room still has a lot of moisture as I hear the system kick on from time to time. Because the unconditioned room is now colder due to the temps falling, I am comfortable turning it up to 60, so it will still likely maintain an ok dew point throughout the winter without drying the house out more.

Sun Radon showing humidity dropping as winter comes yet dehumidifier is still running.

Sun Radon feature tracks humidity + temp overtime to assess mold risks.

In summary, my home’s (and most homes’) design requires supplemental dehumidification in the basement. The home and utility room should be tighter, the sump pit should be gasketed, and ideally, better foundation water management practices should have been implemented. Because that did not happen, I know I have to run this probably around 45 in the summer and in shoulder seasons too. I may need to condition the utility room to get the temp down and prevent mechanical damage. Thankfully in MI, half of our year is bone dry, so it is not a huge worry to run that high, but having the other half humid should be a concern for others with similar homes built this way which I believe is the average. Perhaps before next summer, we will get the sump pit gasketed and maybe do some airsealing to see if it has an impact. Climate forecasts predict dryer Michigan summers so that may help but overall, it seems like a good argument for people to get full basement dehumidification to protect their homes and health. So in summary, use air quality monitors to monitor basements and crawl spaces (such as SunRadon, which tracks mold risks or Awair) buy an Aprilaire dehumidier for your home and your client’s project, and when remodeling or building new, follow the water management practices given by energy star to keep moisture out. 

Dew point calc before AprilAire

Dew Point Calculator While AprilAire is running

Extreme Humidity Spike when driving and long rains hit in utility room even with AprilAire turned down to 40 degrees

VOC spike after install

VOC spike moves to upstairs as well

VOC spike moves to upstairs as well

Hourly usage snap shot before AprilAire

Hourly usage snap shot after AprilAire

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Welcome Eliza Searles, New Program Manager

Eliza Searles is keenly interested in the relationship between well-being and the built environment.  After learning about the USGBC’s LEED program as an undergraduate in Aquinas College’s Sustainable Business program, she was intrigued by the effect of buildings on their occupants as well as the natural world.  She became a LEED Green Associate, then started a career in real estate.  To be better equipped to help buyers and sellers highlight and understand green home features, she became a GREEN Designee through the National Association of Realtors.  Still wanting a deeper understanding of building science and how buildings are constructed, she began studying Construction Management at Michigan State University.  With a desire to spend more time working toward sustainable building initiatives, she joined the GreenHome Institute as Project Manager.  She is excited to continue to develop the knowledge and credibility of a valuable green building professional while making a meaningful impact on the human and natural environment.

Please contact Eliza at eliza.searles@greenhomeinstitute.org to start your next green building certification project!

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Inflation Reduction Act Resources

https://www.whitehouse.gov/cleanenergy/?utm_source=cleanenergy.gov

https://www.justsolutionscollective.org/solutions/jsc-ira-analysis

https://www.rewiringamerica.org/app/ira-calculator

https://www.rewiringamerica.org/policy/inflation-reduction-act

https://snuggpro.com/blog/item/what-the-HOMES-rebate-program-means-for-states-home-performance-industry

“https://www.cleanegroup.org/the-inflation-reduction-act-is-a-game-charger-for-nonprofits-seeking-solarstorage/”

https://michigansaves.org/wp-content/uploads/2022/09/Resi_IRA_FactSheet.pdf?utm_source=Michigan+Saves&utm_campaign=fe012fae98-Improvements+for+Genisys+Credit+Union_COPY_01&utm_medium=email&utm_term=0_bb6b47f5f9-fe012fae98-459912952

https://www.mitsubishicomfort.com/inflation-reduction-act

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Rob Derksen Joins GHI Board 22 – 24

Rob Derksen has spent the past 32 years in the Geothermal heating and cooling industry and is currently the Business Development Manager for Enertech Global LLC, a Geothermal and Air to Water Heat Pump Manufacturer. Rob is also a Co-Owner of  Michigan Energy Services, (an HVAC company specializing in Geothermal heat pump installations).

In 2017, Rob started D4 Consulting to develop a much-needed software package that simplifies the design and sales process for HVAC systems.  This software allows HVAC Contractors to deliver onsite proposals in a single home visit as well as provides energy and economic life cycle comparisons of Geothermal and other HVAC systems to homeowners.

Rob’s well-rounded understanding of the home as a system, and his passion for education-based selling helps Customers choose products and processes that truly match their wants, needs and goals.

Rob joined GHI during our residential net zero conference to discuss his net zero home, you can learn more https://youtu.be/57WM-HEDMYo