Award Winning Samish Solar Home Case Study

Award Winning Samish Solar Home Case Study

Written by: Nicole Miller

The U.S. Department of Energy announced that the submission for the Samish Solar Home from Powerhouse Designs and TC Legend Homes has been selected as a 2023 Housing Innovation Awards Winner!

Department of Energy Zero Energy Ready Home Housing Innovation Awards 2023 Winner official poster. 
"Powerhouse Design & TC Legend Homes" 
"Samish Solar Home, Bellingham, WA. TCLegendHomes.com." 
Photographed is the home that has won the award. It is a south-facing home with clearstory design, painted a forest green on the exterior with sunroom and covered porch and separate entry between the main house and the garage. 
“This is by far the most e cient, nicest, and most comfortable house we have lived in!” Homeowner
"Project Data
Layout: 4 bdrm, 3.5 bath, 2 fl s, 2,345 ft
• Climate: IECC 4C, marine
• Completed: June 2023
• Category: Custom for Buyer
MODELED PERFORMANCE DATA
• HERS Index: without PV 33; with PV
-20
• Annual Energy Costs: without PV
$650; with PV $-300
• Annual Energy Cost Savings: (vs
typical new homes) without PV $1,500;
with PV $2,450
• Annual Energy Savings: without PV
11,550 kWh; with PV 23,100 kWh
• Savings in the First 30 Years: without
PV $62,400; with PV $101,800" 
"Key Features
Walls: SIPs, R-29 total: 6.5" graphite EPS SIP with OSB sides. House wrap, fi ber cement lap
siding. Aerosolized acrylic whole-house air sealing.
• Roof: SIP roof, 10.25" R-49 graphite EPS SIP roof, insulated splines. Synthetic
underlayment, metal roofi ng with cool roof index of 32.
• Attic: Unvented vaulted ceilings.
• Foundation: Slab-on-grade foundation; R-23 ICF stem walls; R-20 closed-cell spray foam
under slab.
• Windows: Triple-pane, U=0.16-0.18, SHGC=0.32-0.50, low-e3, argon-fi ll, vinyl-framed.
Shading: extended eaves, landscaping for shade, half of sunroom roof is opaque metal.
• Air Sealing: 0.27 ACH50, all SIP panel joints sealed with double bead of mastic and tape.
Windows and doors are foamed in. Whole house aerosolized acrylic sealant.
• Ventilation: HRV, continuous at 30 cfm, humidistat and CO sensored for boost. Also
mobile phone alert to IAQ sensors. HRV has HEPA fi lter.
• HVAC: Air-to-water heat pump, 3.92 COP for heating and 6.75 for cooling; 23.02 EER.
Radiant fl oor heat downstairs, fan coil upstairs. Designed for passive heating.
• Hot Water: Powered by the same air-to-water heat pump that heats and cools the home.
• Lighting and Appliances: LED lighting. ENERGY STAR appliances, induction cooktop.
• Solar: 10.8-kWh PV.
• Energy Management System: IAQ sensor controls for ventilation.
• Other: PV designed for house load + electric vehicle charging."

This national award represents a significant achievement, recognizing the most impressive and advanced homes among leading DOE Zero Energy Ready Home builders. Our standard-setting leadership serves as an example of what every homebuyer in the nation should come to expect and demand from their home.

US Department of Energy Zero Energy Ready Home Housing Innovation Awards Winner. "Powerhouse Designs & TC Legend Homes"
"Bellingham, WA
TCLegendHomes.com
Project: Samish Solar Home
Bellingham, WA"
"2,345 sqft, 4 bedroom, 3.5 bath, 2 floors. 4C Marine, Custom for Buyer." 
"HERS -20. This home's score with PV" - Indicates the HERS overachieves beyond the point of being just a Net Zero home which has a HERS of 0. The average new home as a HERS of 90 and the average existing home has a HERS of 140. 
"$-20 Average Monthly Energy Bill. Calculated." 
"$2,450 Annual Savings. Calculated versus typical new homes."
"$101,800 Saved in the first 30 years. Includes fuel escalation rate, 2021 EIA Energy Outlook."

The Housing Innovation Awards helps us celebrate our success in providing our customers with the best in energy efficiency, indoor air quality, comfort, and construction quality. Awardees this year are being recognized for innovative use of off-the-shelf technologies and strategies to achieve advanced performance; innovative use of leading-edge technologies and strategies to achieve advanced performance; market transformation through education efforts; and innovative implementation of decarbonization strategies.

"Powerhouse Designs & TC Legend Homes, Samish Solar Home, 2023"
A floor plan of the winning home.

Find Out More About the HIA Awards Here.

To start designing your very own potential future Housing Innovation Awards winning home, contact us today!

TC LEGEND WINS 2023 HOUSING INNOVATION (HIA) AWARD!

TC LEGEND WINS 2023 HOUSING INNOVATION (HIA) AWARD!

TC LEGEND WINS 2023 HOUSING INNOVATION (HIA) AWARD!

The U.S. Department of Energy is pleased to announce that the submission for the Samish Solar Home from Powerhouse Designs and TC Legend Homes has been selected as a 2023 Housing Innovation Award Winner!

This national award represents a significant achievement, recognizing the most impressive and advanced homes among leading DOE Zero Energy Ready Home builders. Our standard-setting leadership serves as an example of what every homebuyer in the nation should come to expect and demand from their home.

This Housing Innovation Award helps us celebrate our success in providing our customers with the best in energy efficiency, indoor air quality, comfort, and construction quality. Awardees this year are being recognized for innovative use of off-the-shelf technologies and strategies to achieve advanced performance; innovative use of leading-edge technologies and strategies to  achieve advanced performance; market transformation through education efforts; and innovative implementation of decarbonization strategies.

We will find out more details come Awards Summit in October about which category we won!

Here are some quick stats on the house:
o Insulation: R-29 walls & R-59 ceiling
o PV: 10.8kW solar array with Enphase microinverters and battery ready
o Air Sealing: 0.27ACH
o HERS Index: -20
o Est. Annual Energy Cost Savings: $2432
o Certifications: DOE Zero Energy Ready Home certified, ENERGY STAR certified, EPA
Indoor airPLUS certified, anticipated Built Green 5-star certified

Find Out More About the HIA Awards Here

TC Legend Homes ‘House-in-a-Hollow’ Home Wins 2022 Housing Innovation Award!

TC Legend Homes ‘House-in-a-Hollow’ Home Wins 2022 Housing Innovation Award!

Written by: Nicole Miller

For TC Legend Home’s 9th time, we are thrilled to announce another Department of Energy Housing Innovation Award (HIA) winning home!

House-in-a-Hollow has won the grand prize for the ‘Custom for Buyer less than 2500 Square Feet’ category. We could not have achieved this award without the amazing homeowners who helped us push the envelope and our extremely skilled field crew who nailed the execution (pun-intended). 🙂

Our very own Talia receiving TC Legend Home’s Department of Energy 2022 Housing Innovation Award!!
Talia had a blast at the EEBA conference last week in Scottsdale, AZ and loved seeing The House in the Hollow showcased!

Each year the HIA updates their application pushing companies to innovate more and change with the times, and this year was no exception.

Along with the house performance, design and materials/sustainability information required, the award also requires the builder to submit information on their business metrics and how they create quality construction.

This year, they added the “Advances Home Concepts” section which consists of written portions on the company’s advanced building practices, smart building techniques and environmental impact.

Much like the Seattle based Built Green program, they have also added a portion to evaluate the company’s sustainable business practices which includes their diversity, equity and inclusion practices, and workforce training.

These latter additions are very valuable as the industry recognizes the interconnection between sustainable housing and equitable housing. Sustainable housing should not just be for the wealthy and, in fact, those of lower incomes are far more likely to live in homes or areas that negatively impact their health.

This is due to the homes being less desirable to the wealthy and therefore cheaper, creating a market where the only homes that are financially available to folks with lower income, are the ones that are unhealthy. It should go without saying that this is unfair and unjust. Making it that much more important the sustainable housing be available for everyone.

 #2022HIA 

Award Winning Features of House-in-a-Hollow

House Description:

  • Size: 1935 sf
  • Bedrooms: 3
  • Bathrooms: 2.5
  • Lot Size: 9.88 acres
  • Garage: separated and unconditioned
  • HERS Index (With PV): -23
  • Annual Utility Costs: -$278.00
  • Energy Savings: 20,354 kWh
  • Net-Zero: Yes
  • Aging-in-Place Design: Yes
  • Clerestory Design: Yes

Certifications:

  • ENERGY STAR
  • Zero Energy Ready Home
  • EPA Indoor airPLUS
  • Built Green 5 Star

Construction:

  • Walls: 6.5 inch Neopor SIP panel (R-29) with Hardie plank lap siding
  • Roof: 10.25” and 12.25” Neopor SIP panel (R-49 and R-59), IKO Armourshake asphalt roofing, foam splines in place of wood splines
  • Air Sealing: Aerobarrier sealed to 0.54 air changes per hour (ACH)
  • Foundation: Slab on grade with R-20 underslab insulation and insulated concrete form (ICF) stemwalls
  • Windows: Vinyl, Triple-pane, Low-e3 coating, Argon-filled, Fixed U-value of 0.15, Casement U-value of 0.18
  • Additional: Extended roofs/eaves and clerestory windows for summer shading and passive winter gain

Mechanical:

  • Ventilation: Zehnder Comfoair 550 whole-house HRV, Fantech HEPA filter, whole house CO2 & humidity sensors
  • Heating/Cooling: Chilltrix CX-34 air-to-water heatpump with Comfopost, radiant in-floor heating on first floor, and fan coil unit heating on second floor
  • Hot Water: Domestic hot water is heated by the Chilltrix heatpump
  • Photovoltaics: 10.56kW rooftop array with microinverters on each panel
  • Electric Vehicle Charging Station: Yes
  • Additional: Awair Indoor Air Monitor that tracks the internal humidity, temperature, chemical pollution (VOCs), PM2.5, and CO2

Finishes:

  • Low Emission Finishes: GreenGuard certified flooring, GreenGuard certified Neopor SIPs, hardwood trim, solid maple cabinets, no-VOC paint, low-VOC sealants, waterbased caulk
  • Additional: 100% LED lighting, Energy Star appliances, WaterSense and low-flow plumbing fixtures, low-emission finishes

Land Development

  • Undisturbed Land: 98%
  • Tree Retainage: 74%
  • Wetland Buffer Mitigation: Installation of 630 native trees & shrubs
  • Landscaping:  Installation of only native plants that require no potable irrigation
  • Grass: No
  • Additional: Large rocks placed along perimeter to deter human impact on wetlands, a few trees removed on the immediate South side of house for passive solar gain & PV array, trees to East & West retained to shade house

Learn more about other innovative builders and award winners here:

https://www.energy.gov/…/buil…/housing-innovation-awards