2011 01-15 nahbrc - whole-house energy retrofits
TRANSCRIPT
Challenges & Opportunities of Whole-House Energy Retrofits
Hawthorne House
2011 IBSSaturday, January 15
8:00 – 9:30 am
Project & Climate
John Wesley Miller Companies Tucson, AZ
Hot-mixed Dry Climate Zone 2
Hawthorne House Built in 1961 1,990 square feet 4 bedrooms, 2 baths Unoccupied “gut-rehab”
Goals
Project Goals: Durability Energy Efficiency Green Accessibility Technological Innovation
. . . a high performance home.
Optimize Energy & Green Climate Considerations Whole-house Analysis 1. Envelope 2. Systems 3. Renewables
Building Materials Local materials Durability Performance Cost
Whole-House Optimization
Optimized Envelope
Over original adobe walls 1 ½” exterior insulation (R-10) Attached using z-strips Finished with 3-coat stucco
Remove roofing & install 2” R-13 polyiso rigid insulation 3-ply built-up roof Painted reflective white
Optimized Envelope
Replace windows Dual-pane low-e, argon U-value: 0.31, SHGC: 0.30
Air Seal Carefully sealed Tested by TEP
New Garage Detached
Optimized Systems
High Efficiency Space Heating & Cooling Air to Air Heat Pump Dual Compressor 19/17.6 SEER Tested duct leakage (not exceeding 5%
of air handler flow)
Mechanical Ventilation Central exhaust fan Fresh air to central return
Solar Hot Water Preheat System Integrated collector storage (ICS)
solar preheat Electric tankless backup water
heater
Solar Electric PV System 1.6 kW (DC) PV System
Optimized Systems & Renewables
Costs
Programs & Incentives
Building America Tucson Electric Power’s (TEP’s) Guarantee program
5 year heating/cooling & comfort Tucson Sustainable Energy Standard Local & State Tax Incentives Awards
EnergyValue Housing Award Southern Arizona HBA’s Builder of the Year Arizona’s Innovation Award
Quality Assurance & Testing
Testing Framing Insulation Installation Air Sealing Testing Window Verification Ducts HVAC Lighting
TEP Third-Party Guarantee Program
Integrated Marketing
Messaging Energy Efficiency Green Solar
Incentives Local & Utility State Federal
Third Party Certification Energy Quality
Awards
Photos?
Armory Park del Sol (APdS)
John Wesley Miller Companies Tucson, AZ
Hot-mixed Dry Climate Zone 2
14 Acre, 99 lot redevelopment 88 homes
Used APdS specs in Hawthorne House
What is the right question?
Dedication Whole-House Energy
Efficiency Quality Management Incentives Correlation of water & energy
savings “Boy Scout” approach to
energy & green building programs
Resources
John Wesley Miller Companies http://johnwesleymillercompanies.com/hawthornehouse.html
BA Best Practices http://apps1.eere.energy.gov/buildings/publications/pdfs/
building_america/ba_cs_retrofit_john_wesley_miller.pdf
NAHB Research Center Corporate: www.nahbrc.com Technical: www.toolbase.org
This concludes The American Institute of Architects Continuing Education Systems Program
Amber Wood
Manager, Energy [email protected]
Questions?