The passage of the Virginia Clean Economy Act set lofty energy savings goals for the investor-owned utilities, in order to meet their greenhouse gas reduction targets by 2045. While there are multiple paths to achieving these goals, a recent report from ACEEE suggests that one key to success could be stronger building codes.
Over the next five years, the Bipartisan Infrastructure Law (BIL) and the Inflation Reduction Act (IRA) will allocate $1.2M towards code training and enforcement. In the ACEEE report, Virginia ranked sixth as one of the best positioned states to take advantage of this new funding to improve its energy codes across the residential, commercial, and industrial sectors.
According to ACEEE, Virginia needs to see the most emissions reduction by 2030 to meet its policy targets. While the VCEA savings targets are focused on cleaning up the grid, building codes can address both new construction and the existing building stock, which accounts for 40% of energy consumption nationwide. Based on their analysis, ACEEE found that Virginia needs to reduce emissions by more than 50% to meet the VCEA goals.
In Virginia, the commercial building code aligns with the IECC model code, but gaps in enforcement and code official training mean the state could save an additional 5-10% on energy costs by utilizing federal funds.
On the residential side, our current code is missing two critical provisions that would align with the 2021 IECC model code – improved R-value for wall insulation, and enhanced building tightness to reduce the number of air changes per hour. By adopting these amendments, ACEEE found that there could be a 17.8% reduction in energy costs. (Learn about the the Virginia building code update process on our website.)
The report also found that Virginia ranked in the median for homes built nationwide. Meaning, approximately 1700 new homes were built across the state in 2019, with the data projecting similar growth moving forward. New home construction is a great opportunity for increased energy efficiency.
Bringing the Uniform Statewide Building Code up to IECC standards and improving code enforcement, can help the state achieve up to 20% in residential energy cost-savings.
While the building code applies more directly to new construction, retrofits are a pathway to reducing emissions and costs in existing buildings as well. ACEEE also looked at carbon emissions from existing buildings and found that, in 2019, over 5 tons of CO2 per capita – equivalent to driving 12,000 miles in a standard gas SUV – were released from Virginia’s existing building stock. By 2050, as much as two-thirds of existing buildings statewide will have been constructed prior to 2020, therefore it is increasingly critical to address existing buildings, in addition to new construction. Utility residential energy efficiency programs will play a major role in reducing emissions from existing housing, thereby highlighting the need for a holistic approach to reducing carbon emissions from Virginia’s built environment.
The timing on the implementation of these federal dollars couldn’t be better. However, deployment of these funds must be part of a comprehensive strategy that takes into account Virginia policy. Facilitating these types of conversations with decision-makers is a role that the Virginia Energy Efficiency Council, and our members, can play. We look forward to that opportunity. Check our new federal funding page and our monthly e-newsletters for continued updates on this important work.
A new program launched by Dominion Energy provides a kit of smart home technology with an instant rebate to eligible customers in Virginia.
New Smart Home technology helps customers save energy and be more aware of the electric use in their home. To help customers adopt this new technology, Dominion Energy is offering eligible customers in Virginia as well as North Carolina rebates on smart home products.
The Smart Home program gives customers the opportunity to purchase a smart home kit on the program website, smarthome.domsavings.com, with an instant $25 rebate. The base kit includes a Kasa Smart Plug with Energy Monitoring, two Kasa Smart Wi-Fi Plug Minis, the Philips Hue Smart White Ambiance LED Starter Kit and a Philips Hue Motion Sensor.
Customers can enhance their smart home setup by adding an ecobee Smart Thermostat ($50 rebate) or Sense Home Energy Monitor ($70 rebate) to their kit purchase, and each is available with an additional instant rebate. The Sense Energy Monitor must be installed in your electric panel by a licensed electrician.
As such, electricians as well as solar installers with on-staff licensed electricians can become participating contractors with Dominion’s Smart Home Program. Participating contractors benefit from the program in many ways including getting listed on Dominion’s website and access to free training. To learn more about becoming a participating contractor including the eligibility requirements, visit www.dom-vendor.com.
With integration between smart home devices and a smartphone and / or voice assistant, customers will have increased control over their home’s energy use, even remotely. Customers will have the ability to put your devices on a schedule, allow devices to perform energy-efficient actions on their own, and connect to other smart technologies.
Learn more about how the program helps customers leverage integrated energy-efficient smart home products to reduce and manage a home’s energy consumption. Visit smarthome.domsavings.com for more information. Terms and Conditions and eligibility requirements apply. Subject to change at any time.
The building code update process in Virginia is underway this year. Workgroups have begun to meet to discuss proposals that have been submitted to DHCD for review. Below are several energy proposals that are currently under consideration by the DHCD energy subgroup committee, on which VAEEC executive director, Chelsea Harnish participates.
Note: You will need to register for a free account on the DHCD website to access the links below.
Proposals under consideration that the VAEEC supports:
EC-C407.6-21: Zero energy construction proposal to align all energy conservation codes with the 2021 IECC
REC-R402.1.2(1)-21: strikes VA amendments to fully adopt the 2021 IECC wall insulation requirements; this proposal was submitted by VAEEC member, Eric Lacey, of the Responsible Energy Codes Alliance (RECA). Using the DOE methodology for reviewing code change proposals, RECA determined that this proposal alone would improve efficiency a whopping 13%!
REC-R402.1.2(2)-21: strikes VA amendments to fully adopt the 2021 IECC wall insulation requirements; identical to the proposal above but submitted by a different patron.
REC-R402.4-21: strikes VA amendments to fully adopt the 2021 IECC air leakage requirements
REC-R402.4.1.2-21: requires 3ACH for air leakage but also provides a trade off for builders
REC-R403.3.3-21: updates air duct testing compliance to align with 2021 IECC
Additionally, the subgroup is also considering a proposal on electric vehicles:
REC-R404.2-21: Electric vehicles proposal to align residential energy code with the 2021 IECC
The Energy subgroup has taken positions on the following proposals, which were reviewed by the full working group on April 14th.
EC-C402.4-21: (Consensus) technical amendment to strikes Virginia amendment language currently in the Virginia Construction Code of the USBC that are either outdated or align with the 2021 IECC
EC1301.1.1.1-21: (Non-consensus) strikes Virginia amendments to fully adopt the 2021 IECC
America has a building problem.
Americans spend up to 90% of their lives indoors, in buildings that were not designed with ventilation in mind. The quality of indoor air affects all aspects of life – health, school and job performance, cognitive abilities, and energy bills.
While COVID-19 brought indoor air quality into sharp focus, many of the most common – and often dangerous – communicable illnesses are spread through airborne transmission. Additionally, chronic illnesses like asthma, cardiovascular disease, and COPD are exacerbated by factors in the living environment. Comparative risk studies performed by EPA’s Science Advisory Board (SAB) have consistently ranked indoor air pollution among the top five environmental risks to public health. In fact, there is over thirty years of research on the effects of indoor air quality on human health and behavior.
Improvements to air filtration and ventilation have lagged behind other building systems for years, leading to what Dr. Vin Gupta, the Chief Health Officer at Amazon, calls “the biggest challenge for public and workspaces of this century.”
“Go back 100 years. The big issue that was killing people were communicable diseases passed fecal to oral,” Gupta said. This issue led to improvements in sanitation and waste disposal across the world. “100 years later, it is how do we ventilate public space and workplaces.”
Building owners and residents need to prioritize improved indoor air quality in their spaces. “Treat indoor air quality like a must-have work benefit, not a trendy perk” said Prof. Joseph Allen, associate professor at the Harvard T.H. Chan School of Public Health. Allen is also leading ongoing research on the correlation between indoor air quality and health.
Allen was a leading author on a recent study that explored the coexistence of energy efficiency and health. The third in a series that focused on the effects of air quality on cognitive function, researchers concluded that cognitive scores averaged between 61-101% higher in green building designs over conventional buildings. The authors stated these findings have “wide-ranging implications” as the study mimicked many typical indoor environments.
Typically, increases in ventilation and filtration result in an increase in energy use, but by leveraging equipment controls and efficient equipment, these programs help building owners and residents keep energy increases manageable.
George Barnes, Account Manager for Complex Solutions for Trane said, “the challenge is to complete [measures] in an energy efficient manner. If done correctly, spaces will be safer, occupants will be healthier, and any cost increases will be mitigated.”
Energy efficiency and green building also reduces absenteeism in schools and the workplace, improves workforce retention and productivity, and contributes to better comfort for residents and workers. As employers bring workers back into physical offices, it is critical that everyone – building owners, CEOs, employees, and more – keep a keen eye on the health of the buildings and the people within them.
On October 27th, the SCC released the final order for the Dominion Energy EM&V proceeding. For this proceeding, the VAEEC acquired expert witness, Mark James, Senior Research Fellow in the Institute for Energy and the Environment and adjunct professor at Vermont Law School to testify on our behalf. Additionally, staff from the American Council for an Energy-Efficient Economy also provided technical assistance to our legal counsel and expert witness. In their final order, the Commission elected to adopt all of the recommendations in the Hearing Examiner’s report, which was released in July.
Below is a summary of all of the Hearing Examiner’s findings and recommendations to the Commission with additional details on key recommendations. We have listed the page numbers in the report for the discussion on each recommendation so the reader can easily dive deeper into any recommendation of interest.
- The focus of this proceeding is on adopting a more rigorous and accurate EM&V, and not on whether the Company’s current EM&V meets industry standards (p 44-50); VAEEC maintained “nationally-recognized TRMs that follow industry best practices, along with new commitments on EM&V that the Company is making in its post-hearing brief, can and will provide the accuracy that the Commission rightly demand”;
- The Commission should direct Staff to participate in the stakeholder process as a stakeholder to work with the Company and others to develop more rigorous and accurate EM&V data (p 50-53); James said, “With the newly established EM&V subgroup, the stakeholder process offers the opportunity for transparent presentation and discussion of options outside of a Commission proceeding. The recommendations generated by the EM&V subgroup would still be subject to Commission approval, but the products of the stakeholder group would be created through a transparent, collaborative, and consensus-driven process. Furthermore, using the stakeholder group allows for greater participation from interested parties and energy efficiency experts.” While SCC staff was concerned that participation would undermine their credibility, the Commission stated that they speak only through their Orders, not through Staff.
- The Commission should adopt the dashboard proposed by Company witness Frost in his rebuttal testimony (p 53-55), and attached to this Report as Attachment 1 (p 78); “The Company’s proposed dashboard represents an executive summary of high-level metrics that is easy to read and understood
at a glance. It focuses on spending, savings, metrics noted in the VCEA (such as carbon emission reductions and bill savings), and progress towards the GTSA and VCEA targets.”
- The Commission should adopt the reporting requirements committed to by Dominion Energy as further outlined in the Discussion (p 55-57); Adoption by the Commission should provide all interested parties clarity concerning the information to be provided by the Company and when that information will be provided. The provisions for using formats proposed by VAEEC witness James (or formats substantially similar) provides some flexibility as to the final format for these filings. Going forward changes in format or in the information provided can be addressed in future DSM proceedings.
- The Commission should direct Dominion Energy to file the May EM&V Report in the Company’s December DSM filings (p 57-58); If the entire EM&V Report from May were also filed at the beginning of the new DSM proceeding, at the time of filing, it would represent the most current EM&V Report.
- Deemed input values meet the measured and verified standard for determining compliance with the energy-saving requirements of the VCEA (p 58-62); VAEEC argued that, because it is impossible to measure electricity not consumed, all EM&V methods rely on extrapolations and have some margin of error and uncertainty. Indeed, VAEEC maintained “the use of Virginia-specific inputs as recommended by Staff might prove to be less accurate than results based on deemed values.” VAEEC extended this to utility-specific data that may be less accurate and reliable than deemed values based on limitations of the utility-specific sample as compared to deemed values based on larger populations over longer periods of time. VAEEC recommended the Commission adopt the Company’s updated EM&V approach
as it is more rigorous and accurate than what was reviewed in 2019.
- To increase the rigor and accuracy of the EM&V process, the Commission should adopt a combination of the Company’s proposed framework and the Staff’s proposed hierarchical framework, with both frameworks as further modified herein (p 62-73);
- The Commission should direct the Company to document the baselines used during program design and all subsequent adjustments or changes to the baselines, and provide the documentation to Staff and the other parties upon request (p 73-75);
- The Commission should direct the Company to increase the coordination between DNV and the program designer(s) consistent with their commitment in this proceeding (p 75); and
- The Commission should direct the Company to undertake at least one baseline study based on Staff’s input. In the final order, the Commission required Dominion to select two programs to use in baseline studies to establish their own baselines for energy savings. The Company has ninety days from the final order to present this information to the SCC.
It’s no secret that technology has changed many aspects of the energy efficiency industry. From building automation systems to LED lighting, there have been many strides in improving the energy use of the inside of a building. But what about the structure itself? The thermal envelope, and the materials used to construct it, account for a large portion of a building’s energy use, contributing to an estimated $372 billion in heating and cooling costs each year.
On September 21st, we held a panel with companies who have created innovative materials that are helping address these issues while improving building efficiency, providing resident comfort, and reducing energy costs.
First, we heard from Mike Lyon with Aerobarrier, which is an inert sealant based on permeable waterborne acrylic. The product is aerosolized in a pressurized space and monitored continuously with proprietary software to achieve maximum efficiency. Originally invented in 1993, the Aeroseal and Aerobarrier products have sealed over 100,000 homes to improve their efficiency, indoor air quality, and comfort. Aerobarrier was able to scale this technology nationwide by using a franchised certified dealer network, which allows the corporate home base to keep advancing both the sealant and the software. “This partnership model allowed us to scale up very quickly, reaching 40 states and Canada in the last five years,” said Lyon.
Next, we heard from Dr. Aashay Arora, a co-founder of Enkoat, which addresses insulation needs from a different perspective. This Arizona based startup, backed by the National Science Foundation, has developed a thermal coating that can be applied like a traditional construction paint to plaster, stucco, and wall panels. Founded by Dr. Arora and Dr. Matthew Aguayo in 2018, Enkoat focuses on developing sustainable solutions for the construction industry. By using their Active Insulation technology, pilot homes were able to reduce their energy use by 30% over a year. Dr. Arora notes that, while the building industry is very conservative, they are “moving slowly towards materials that are carbon neutral, sustainable, and have longer life.”
Finally, we heard from Zack Mannheimer with Alquist 3D, which works to address the housing shortage across rural and suburban America by creating affordable 3D printed concrete homes, including two homes in collaboration with Virginia Tech located in Williamsburg and the greater Richmond area. With the compound problems of COVID-19, skyrocketing materials costs, and rapidly inflating housing prices, more than 30 million people are expected to move away from major cities by 2023 – and they’re going to need somewhere to live. By reducing the upfront costs of building, and carefully controlling the materials needed to produce a home, Alquist 3D is able to address these needs. They are also working with One Vision Holdings to move toward hemp-based concrete and insulation, reducing the carbon impacts of concrete.
To learn more about these technologies, watch the recording of our recent webinar, Innovating the Building Envelope.
The Dominion Energy proceeding on Evaluation, Measurement, and Verification (EM&V) before the SCC will be held next week. The VAEEC is formally participating in this hearing in support of EM&V measures that will help ensure the energy efficiency goals of the Virginia Clean Economy Act (VCEA) are met. EM&V is a critical first step in quantifying the value of energy efficiency programs, which allows demand-side management resources, like energy efficiency, to compete with supply-side resources, such as a natural gas plant, in meeting future energy needs in a cleaner, healthier way.
The inherent challenge of evaluating energy efficiency programs is that there is no simple “meter” to record kilowatt-hours saved. As a result, a baseline needs to be established to identify what would happen in that program’s absence. However, there must be a balance between the cost of evaluation and the benefits of obtaining more precise data, as the pursuit of precision can siphon funds from the actual implementation of that energy efficiency program without adding significant benefit. To accomplish that balance, most utilities use deemed savings, or reasonable and unbiased estimates of energy and cost savings based on standard industry methods.
During their pre-filed testimony, the SCC staff questioned the use of deemed savings and non-Virginia data and recommended establishing customized baselines for each individual program currently underway, despite this being against industry best practices. The VAEEC has serious concerns about this recommendation. Every dollar spent on EM&V is a dollar that cannot be spent on providing actual program services to customers. A requirement to use only Virginia-specific data or a rejection of deemed savings estimates can drive up EM&V costs without always providing improvement in EM&V data.
We have several recommendations that would ensure the best use of program dollars without unnecessary spending on duplicate data gathering.
- Join the Mid-Atlantic Technical Resource Manual (TRM): A TRM provides the value of previous evaluation efforts while maintaining the flexibility to adapt to local- or utility-specific conditions such as lifespan estimates for specific measures, operating hours, baseline conditions, and local climatic conditions. When performing EM&V on their programs, Dominion already defers first to the Mid-Atlantic TRM, then factors in Virginia-specific data when appropriate. Formally joining the Mid-Atlantic TRM would provide uniformity in evaluation across all Virginia utilities and would further increase transparency into the process itself.
- Allow Flexible, Portfolio-Level EM&V Spending: The Commission should set spending caps at the portfolio level to allow for greater flexibility and additional energy-saving benefits. After reviewing EM&V data, a utility should be able to shift funds between programs (e.g., 10 percent to 15 percent) without having to seek additional approval. Removing these caps would permit greater flexibility, which can ultimately boost the energy savings generated from the portfolio without imposing additional costs on customers.
- Stakeholder Input: Allow the stakeholder group to assist in developing consensus for EM&V methods. With the newly established EM&V subgroup, an opportunity is provided to present and discuss options for EM&V methods and protocols outside of a Commission proceeding. By using the Mid-Atlantic TRM for this purpose, the stakeholder group would avoid the unnecessarily burdensome process of developing and approving the specifics of every measure-specific or program-specific baseline. The recommendations generated by the EM&V subgroup would still be subject to Commission approval, but the products of the stakeholder group would be created through a transparent, collaborative, and consensus-driven process.
- Dashboard: We support the requirement of both a quarterly “dashboard” and “annual summary”. A dashboard should provide a program-by-program snapshot of key activities, such as participation numbers and program spending, in order to track how the company’s energy efficiency portfolio is progressing throughout the year. The annual summary would contain audited and finalized savings for the company’s DSM programs to ensure compliance with the GTSA and the VCEA.
If you want to dive into this a little more, you can read our expert witness’ pre-filed testimony here.
This week marks the 51st anniversary of Earth Day. But for many VAEEC members, every day is Earth Day! Energy efficiency is one of the easiest and most cost effective ways to reduce fossil fuel dependence and preserve natural resources. In honor of the holiday, we’ve compiled a list of tips and tricks to save energy and help the planet.
Schedule a Home Energy Audit
Home Energy Audits are a great first step to improving your home’s energy efficiency. Whether you go through your local utility or work with a provider like Viridiant, the energy audit will help determine what upgrades your home needs to save energy and money.
Switch Out Your Lighting and Appliances
Incandescent light bulbs and older appliances can waste a lot of energy around your home. Change your bulbs to energy efficient LEDs and recycle that old refrigerator to make a significant dent in your energy use. The Dominion Energy Marketplace and Rebate Programs and Appalachian Power Energy Savings sites have discounts and rebates available for lighting and appliance upgrades.You can also contact your locality to see if there are savings programs available in your area. The Virginia Energy Sense Residential Incentive Directory compiles many of the current energy efficiency programs from around the state to make it easy to identify energy efficiency opportunities. .
Get Smart at Home
Smart appliances come in all shapes and sizes, and some are great for effortlessly reducing your energy use. Smart bulbs make it easy to turn off all the lights at once, and a smart thermostat can use machine learning to adjust the temperature based on occupancy and peak demand.
Seal That Leak
Windows and doors can lead to a lot of energy waste, especially in older homes. While the best long term solution would be to replace drafty, leaky windows with a more efficient variety, that’s not always an option for homeowners. Caulking around windows or adding weather stripping can reduce the energy waste without breaking the bank.
Let the Sunshine In
Blinds and blackout curtains are great tools to optimize the heat and natural light from the sun. Keep the curtains open during very sunny days to take advantage of the warmth and light, then close them in the evening to keep that heat inside. Curtains also can help block outside air from drafty windows, helping maintain a comfortable temperature in the room.
Kill Off Energy Vampires
Appliances still draw power when not in use, so all those laptop chargers and kitchen gadgets can add up to a lot of energy wasted. Unplug your small appliances when finished using them, or invest in a smart power strip that will cut power when not in use. Power strips also help ensure that your electronics don’t get fried in a storm or power surge, so it’s a good idea to have anyway.
Women have been at the forefront of energy innovation for over a century. From Katharine Burr Blodgett, who invented the monomolecular glass coatings that make solar panels and LED bulbs possible, to Beatrice Hicks, who developed environmental sensors for heating and cooling systems, the contributions of women in energy efficiency are everywhere.
Here at the VAEEC, the work women do to advance energy efficiency is obvious – we’re an all women team, with several additional women serving on our Board of Directors. In honor of Women’s History Month, we asked several of them – Board Secretary Liz Beardsley, and Board member Leigh Anne Ratliff, and Executive Director Chelsea Harnish, – about their roles in the energy efficiency industry and their views on the industry itself.
How did you get into the energy efficiency industry?
Liz: I was drawn towards environmental issues from my childhood love of nature… and towards engineering from my interest in math and science. So environmental engineering was a natural fit in college. Through my career this eventually led to environmental policy, including using policy to reduce energy consumption and its impacts through efficiency.
Leigh Anne: I got into the energy efficiency industry from working with the PJM energy efficiency rebates. This program afforded me the opportunity to work with owners, contractors, engineers and architects on the many energy efficiency initiatives around the Commonwealth – from LED upgrades to specialized industrial equipment upgrades. I’m lucky – I get a bird’s eye view of this exciting industry.
Chelsea: As a policy manager for an environmental advocacy group, I had a basic understanding of energy efficiency and its benefits for creating a cleaner, healthier world. When the opportunity to lead the VAEEC became available, I jumped at the chance to really dive deeper into understanding this industry and its challenges and opportunities.
What do you see as the biggest challenges and opportunities for women in the energy efficiency field?
Liz: There can still be some unfortunate and inaccurate stereotypes about women in technical fields so perhaps a challenge in some circumstances is being underestimated. By and large however I see many opportunities for women in energy efficiency and each individual, woman or man, will do well to understand and leverage their own strengths.
Leigh Anne: I think the biggest challenge for women in the energy efficiency field is that a good part of it lies within the realm of STEM and women are still only 28% of the STEM workforce. When I went to engineering school it was a rarity for women to be in the classroom – but that was in the 1980’s. I can’t believe that there is still such a disparity. That being said, the smaller numbers of women in this field is an opportunity as well – employers see the value of diversity and women are succeeding in leadership roles in the energy industry. It’s a fun time to watch LinkedIn and see which women in energy are getting promoted to the highest levels in their company.
Chelsea: I think the opportunities for women in this field are endless. Our industry is so unique in that there are a wide range of positions from inventing new technologies or writing code to spending your days in a crawlspace, and everything in between. This industry provides the opportunity to do what you love while helping make someone’s home or workspace more comfortable.
What advice would you offer women entering the industry?
Liz: Work hard, be aware of opportunities, find your voice and use it.
Leigh Anne: Listen a lot and build your skillset. Develop mentors. You’re not expected to know everything so be patient with yourself. Take notes and follow up if you hear something that interests you or you don’t understand. Be curious and brave!
Chelsea: My general advice for young women entering the workforce is to not be afraid to use your voice. You were chosen for your position as the best candidate so don’t feel that you cannot bring new ideas to the table.
What is your number one energy efficiency tip?
Liz: Turning off the lights. My dad drilled this into me as a child in the 70s and I think it creates an awareness and mindset that carries into many other things with a cumulative beneficial impact.
Leigh Anne: If you haven’t installed LEDs yet, run to a store and get them right now.
Chelsea: We love our smart thermostat!
What is one thing about the energy efficiency industry that you would like to see change?
Liz: Breaking down silos! There is a lot of fragmentation. [But] when we work together, we have a stronger message and can achieve more. This is one of the great benefits of VAEEC!
Leigh Anne: I’d like energy efficiency to get more credit for the game changer that it is.
Chelsea: We need more workforce development training to provide more demand for the job creation we are seeing and hope to see further in the future.
Virginia Uniform Statewide Building Code Updates
The Department of Housing and Community Development Board has finalized the latest update to the Uniform Statewide Building Code (USBC). This update puts us nearly inline with the 2018 model international energy conservation code (IECC). (The international model code comes out every three years with the 2021 update recently being finalized. More details on that below).
The latest update to the Virginia USBC includes some major energy improvements such as:
- Increased fenestration, which has been included in the model code since 2012
- Blower door testing requirements, which has been included in the model code since 2012
- Increased minimum ceiling insulation from R-38 to R-49, which has been included in the model code since 2012
- ResCheck compliance updated to 2018 IECC, without Virginia amendments. Previously, a work around had been created for VA amendments that weakened the current IECC.
- Energy certificate requirements, which has been included in the model code since 2006
These improvements, in addition to the expanded energy requirements we worked to incorporate into the last USBC update, bring Virginia nearly inline with the 2018 IECC. Along the east coast, only a handful of states have fully adopted the 2018 IECC, and only one southeastern state- Florida- has done so.
The remaining proposals from the 2018 IECC that are not included in the Virginia USBC are:
- Increased wall insulation R-value
- Changing building tightness from 5 ACH to 3 ACH
There is a 30-day comment period open on the Final USBC in the Virginia Register through March 31, 2021. DHCD anticipates an effective date of July 1st, and will begin the 2021 update once the 2018 update takes effect.
General Assembly Bill Update
The General Assembly also passed a bill in 2021 mandating a review of the most-updated IECC. While the original version of this bill mandated an automatic update to the latest IECC within one year, the final bill does not provide a timeline, nor does it expressly state that an automatic update is to occur. Instead, it requires the state to consider amendments that address the changes made in the model code. Since this is quite vague, it’s unclear how this will affect future update processes.
Updates at the International Level
The 2021 IECC was also finalized this fall after a massive appeals process. According to the DOE Office of Energy Efficiency and Renewable Energy, the energy requirements in the final model code will account for a whopping 19% in energy efficiency gains in the residential sector when implemented.
Key changes include:
- Envelope: fenestration and insulation increases
- Lighting: increased efficacy to promote LED use
- HVAC: duct leakage testing required in conditioned spaces, mechanical ventilation systems tested for flow rates, and ventilation fan efficacy increased
- Performance Path/ ERI: provides builders more flexibility to choose options that will work on specific projects based on their particular design, building type and location.
- Optional zero-energy compliance pathway: provides jurisdictions an opportunity to adopt a base or stretch code that achieves zero energy in homes and low-rise multifamily buildings.
More details about these changes can be found in this DOE Office of Energy Efficiency and Renewable Energy presentation.