Home Energy Rating System

Home Energy Rating System

Home Energy Rating System

Written by: Sarah DesRosiers

How energy efficient is YOUR home?  There are many factors that contribute to a home’s energy efficiency.  These factors include the home’s building structure such as insulation, windows, and doors.  It also includes the efficiency of appliances and lighting as well as the occupant’s living habits.  For example, does the occupant turn down the thermostat when leaving the home or unplug appliances when not being used?  In addition to the building structure of a home, the building orientation or how the home is positioned, on site, plays a role in how the home performs energy wise. How We Use Site Orientation to Maximize Energy Efficiency

According to the US Department of Energy US DOE, homes and buildings in the US consume 40% of the energy in our country.  On average, Americans spend around $2000.00 per year on energy.  Not only does energy efficiency matter because of the expense, but when it’s considered in your building practices, it improves the quality of living in the space; making it more comfortable

What is HERS?  HERS stands for Home Energy Rating System.  It is a way to measure your home’s energy efficiency by testing the Heat Recovery System.  How does it work?  A HERS Index rating is determined by a certified RESNET HERS Rater.  The steps to determine a home’s HERS rating is a multi-step review of a home’s energy usage/performance.  The first step involves a pre-construction or pre-inspection plan review where the HERS Rater inputs floor plans, building materials, HVAC equipment, windows/doors and insulation plans into an approved energy software, which predicts a HERS Index prior to the build. Next, the certified HERS rater inspects a project at a couple different stages of the project.  An inspection is performed at the pre-drywall phase and then again at the home’s completion to test the buildings performance. The final diagnostic testing is the way in which the final HERS rating is determined.  During this final inspection, several diagnostic tests are performed.  First, a Blower Door Test is done where a calibrated fan is placed in an exterior doorway.  The home is then depressurized.  The fan can then measure how much air leaks through the exterior envelope of the home. Secondly, the certified Rater will perform a Duct Leakage Test where a duct blaster is used to pressurize the ducts and measure the leakage to the outside.  Thirdly, the Rater inspects the insulation installation to determine air barrier continuity.  The fourth inspection includes the Mechanical System Verification where the Rater considers the HVAC type and its efficiency, the water heater efficiency, the ventilation systems, and the efficiency of appliances and lighting.  With all the above testing, the Rater determines a final calculation of the HERS index.  The final HERS Index score reports the home’s energy use breakdown, projected cost of utilities, efficiency recommendations, and test result of duct leakage. 

What does the HERS Score actually mean?  According to RESNET HERS INDEX, the lower the HERS score, the more efficient the home.  A HERS rating of 100 is equivalent to a standard home built to code.   A score of 50-60 is a build that performs above average. Every point under 100 is 1% more efficient.  A HERS 0 is a Zero Energy home, which means the home requires no additional power.  Essentially, it’s a home that produces enough electricity to offset what it uses and a HERS <0 is a Net-Positive energy home meaning that the home produces more power than it uses. Imagine charging your electric car AND still having a $0.00 power bill at the end of the month; this is a Net-Positive Home. 

At Legend Homes, we build award winning Net Zero and Net Positive Energy Homes.  A HERS rating is important in determining just how energy efficient a build is upon completion.  Our most recent spec home has a HERS rating of -4, which means that this home is Net-Positive. The image depicts the HERS rating score for this recent build.  

 

A HERS rating is essentially the gas mileage rating of a vehicle, but for a home. It is the best gauge in determining the quality of the invisible or internal workings of a home.  At Legend Homes, we use EPS foam in SIP’S panel walls and roof systems to create a super insulated envelope. FAQ’s about SIPS  We use insulated concrete forms or ICF’s to complete the envelope in the ground around the footprint.  Additionally, we use high efficiency triple pained windows as well as the most efficient electric heat pumps available in North America. We orient our homes to the sun to capitalize on solar exposure for both solar panels and solar heat gain. We look for High R-values and air seal our homes. We use a process called aero barrier, which is a process that involves pressurizing a home and misting latex particles into the air that collect and seal any unseen cracks.  We use HRV’s (heat recovery ventilation system) that harvest warm conditioned air from the inside of the house and transfer it to fresh air being brought into the house. This allows for high air quality in combination with energy conservation.  How We Build for Energy Efficiency

Building an energy efficient home requires so much more than simply adding solar panels to a roof.  There’s a lot of buzz around Green Building and we want consumers to be aware of misleading advertising often referred to as “Greenwashing” where products are advertised as environmentally friendly or Green when they really are not.  Solar power is an important piece, but only one factor in achieving a true Green Built Home.   Our award-winning Green Built Homes are designed in a manner where every part of the design is geared toward achieving a Zero Energy/Net Positive outcome.

At Legend Homes, we build houses that are not only comfortable to live in, beautiful to the eye, but also inexpensive to run and better for the planet!  Why Sustainable Housing Is Important

 

Case Study & 2024 HIA Winner: The Lynden Powerhouse

Case Study & 2024 HIA Winner: The Lynden Powerhouse

Case Study & 2024 HIA Winner: The Lynden Powerhouse

Written by: Talia Dreicer, Nicole Miller & Senna Scott

The Lynden Powerhouse Case Study, written by Talia Dreicer, was featured in this season’s Master Builders Association Publication!

“The Lynden Powerhouse is a highly efficient, net-positive energy home that cultivates meaningful aging-in-place living and community connections in Lynden, Washington. Designed by Powerhouse Designs and built by TC Legend Homes, this 5-bedroom, 4.5-bath home features three distinct living areas and seamlessly merges innovative design techniques, a high-efficiency HVAC system, and automation technology to create a beautiful and comfortable home. Receiving DOE Zero Energy Ready Home, ENERGY STAR, and EPA Indoor airPLUS certifications, along with a Built Green 5-star certification, this home is a shining example of
high-performance housing.

In the years leading up to their retirement, Baby Boomer couple Lee Anne Caylor and Bob Edmiston saw two potential paths. According to the couple, the choice was “a decision between lives of generativity or stagnation.” Caylor and Edmiston chose the path of generativity, focusing on creating a future where they could share time and knowledge with family, friends, and community. They started envisioning their future home, the Lynden Powerhouse, as an accessible, comfortable, and healthy living environment that would
enable meaningful intergenerational living and support human connection. The COVID-19 pandemic only furthered their interest in positively impacting the lives of their family, community, and the planet, helping them refocus from their professional goals towards providing solicitude for both younger and older family members alike. The couple also saw the Lynden Powerhouse as a chance to push the high-performance housing envelope. Edmiston, a self-described “mad scientist” with a technical background and keen mind for
understanding how things work, wanted to incorporate automation technology and add resiliency measures to optimize resources and reduce future financial burdens. Seeking a team that could deliver on their project goals, Caylor and Edmiston approached Powerhouse Designs and TC Legend Homes to design and build the Lynden Powerhouse.”

Additionally, we were excited to hear this week that Lynden Powerhouse is one of the 2024 DOE Housing Innovation Award winners! We don’t know what category the home has won yet, but we are beyond ecstatic and grateful to be receiving yet another win.

This was truly possible because of the collaboration with our incredible clients who were willing to push the envelope with us. We have the deepest appreciation for them and the innovative smart home features they created!

Net Zero Energy Co-Housing

Net Zero Energy Co-Housing

Net Zero Energy Co-Housing

Written by: Nicole Miller

We are excited to announce our Net Zero Energy Co-Housing spec project that’s currently
under construction!

Titled “Woburn House” on our social media, this 5-bedroom home is
intended to house multiple family units and has an accessible first-floor bedroom and bathroom.
Our hope is for this to be a multigeneration home creating a small, tight-knit community.


As always, this home will create its own power, leaving the residents with zero electric bills. We
also anticipate it will receive Built Green 5-Star, Indoor AirPlus, EnergyStar, and Zero Energy
Ready Home certifications.


Once completed, this home will be open for lease or purchase!

Addressing Middle Housing Concerns

Addressing Middle Housing Concerns

Addressing Middle Housing Concerns

Written by: Nicole Miller

Are you concerned about what the addition of middle housing is going to do to your neighborhood? Are you concerned about it changing the character of the houses, or make your street too busy? Maybe you are all for middle housing but just don’t want it near you. Or maybe you have no idea what middle housing is.

In this article we will explore what middle housing is and what it can look like, along with the impacts it can have on a neighborhood.

Photo Credit: Opticos Design

What is middle housing?

So, what is middle housing anyways? The WA Department of Commerce defines middle housing as “house-scale buildings with multiple units in residential neighborhoods.” That means, any housing structure that is any kind of -plex housing like a duplex or triplex, townhouses, courtyard apartments, cottage homes. “Middle” refers to middle-density housing, as opposed to large apartment complexes which are considered high-density housing, and single-family homes which is considered low-density.

What does middle housing look like?

You may still be thinking, “Well, I certainly don’t want a fourplex in my neighborhood! It’s going to stick out like a sore thumb.” Which is an understandable opinion, especially if you’ve only ever seen -plexes that look like your typical apartment complex. But they don’t have to look like that.

With the changing needs of our population, large single-family homes are becoming more and more unnecessary and unaffordable for most people (see our last blog on the statistics). But also we don’t want to tear down beautiful historic homes, or homes that are generally in good condition. So, what about renovating the inside of these preexisting 2000+ square foot homes and splitting them into multiple single- or two-bedroom units, thereby creating a -plex house? It still keeps the same exterior integrity, matching the rest of the neighborhood and you won’t even be able to tell that there are multiple units inside. A scenario like this is also the best case in terms of carbon footprint, because you are utilizing and revitalizing the entire shell and bones of a house.

Photo Credit: Everett Middle Housing Resources

These inconspicuous -plex housing can be easily built in new construction as well. When you looked at the above photo, did you know that it was six-plex just looking at the exterior?

In some areas, lots are already laid out in a way that makes housing options like cottage homes even easier to hide. Take a look at the below cottage community built in Silverdale, Washington. Add some foliage along the perimeter, and you would never know it was hidden on the lot.

Photo Credit: Chico Beach Cottages – Silverdale, WA; The Cottage Company & Wenzlau Architects

Part of what will make middle housing successful is utilizing the correct types for each area. The idea is not to plop a giant multi-plex that looks like an apartment complex in the middle of a quaint neighborhood. That doesn’t make sense for anyone. But it does make sense to put a larger multi-plex on the edge of the neighborhood abut the commercially zoned areas and on busy corners. The point is to put density nearest to the city resources.

Photo Credit: Washington State Department of Commerce

Photo Credit: Washington State Department of Commerce

Middle housing and parking

Perhaps you’re concerned about more vehicles on the roads in your neighborhood, either parking on the streets or causing traffic?

Summarized by Sightline Institute, as it stands right now, the law “cap[s] mandates at no more than one parking stall per lot on lots 6,000 square feet or smaller, and at no more than two stalls per lot on lots larger than that.” And any middle housing that is within a half-mile of a major transit stop will not be subjected to any parking mandates.

But what does this mean for you? Firstly, the point of creating such high-density housing near commercial areas and transit, is to also reduce the need for individual vehicles. When a community is walk-able and transit is readily available, less people will have cars. We are also seeing more households reducing to only one car instead of two. Take Seattle for example, whose population is ever increasing but their overall car population has remained stable for the past several years.

Photo Credit: Washington State Department of Commerce & Opticos Design

Now, for the lots that will mandate parking, if we are looking at what most likely is going to end up in your neighborhood, a duplex, triplex, fourplex or six-plex, that means they will be required to have two, three, four or six parking spaces respectively. For a duplex and even triplex, that’s not going to be more parking than a typical single-family home already has in many cases. And looking at the site plan above from Opticos Design, the parking spots can be easily hidden from street view. Fourplexes and six-plexes will be in a similar boat, where parking could potentially be hidden, or it may end up right off the street. And while that won’t be as nice to look at, think about how many houses have garages and driveways already at the front of the house. It won’t be out of place to have that much flatwork. Moreover, because of the required parking spaces, there isn’t likely going to be more vehicles parked on the street, as the households moving into the middle housing are typically smaller and therefore won’t have multiple cars.

Overall, the number of extra vehicles on the road is going to quite minimal taking all of the above into account. So there isn’t anything to worry about when it comes to cars.

Conclusion

If you are still thinking, “Well, who would even WANT to live in these?” Just remember that not every type of housing is for every person, but there is a market for every type of housing you could think of, whether it’s something you, personally, would want to live in or not. And with housing being as expensive and unaffordable to purchase these days as it is, there are many people who just want something they can afford and put equity into that meets their minimum needs. Which middle housing can do, while increasing many people’s quality of life. Middle housing a crucial step towards ensuring younger and older generations alike have reliable housing.

As housing-for-everyone advocates, TC Legend Homes and Powerhouse Designs strives to educate the public on these important issues while providing healthy, net-zero, carbon neutral budget homes in a effort to not only help the housing crisis, but provide top-performing homes.

To further discuss middle housing and the path forward for our community, or to get started on your very own project, contact us today!

Featured in the Northern Lights: Point Whitehorn net-zero home constructed with efficient features

Featured in the Northern Lights: Point Whitehorn net-zero home constructed with efficient features

Written by: Senna Scott

Our Point Whitehorn net-zero home was featured in @TheNorthernLight Blaine & Birch Bay’s Community Newspaper!

“Nestled adjacent to wetlands and with views of Birch Bay State Park, TC Legend Homes’ Point Whitehorn house is not your average house. The home has a 7.2kW photovoltaic system – the conversion of light into electrical energy – and is built in a highly efficient envelope, setting it up to be a net-zero energy house in Birch Bay.”

You can learn about our cost-saving measures and design challenges by reading the full article online >> HERE <<