1 / 13

U.S. Perspective on Market-Rate Zero Energy New Homes

U.S. Perspective on Market-Rate Zero Energy New Homes. Net Zero Energy Homes Forum Toronto, January 19, 2005 ~ Duncan Callaway Davis Energy Group. U.S. Federal ZEH Program. Launched in 2001 by NREL and DOE

nantai
Download Presentation

U.S. Perspective on Market-Rate Zero Energy New Homes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. U.S. Perspective on Market-Rate Zero Energy New Homes Net Zero Energy Homes Forum Toronto, January 19, 2005 ~ Duncan Callaway Davis Energy Group

  2. U.S. Federal ZEH Program • Launched in 2001 by NREL and DOE • Goal: Combine energy efficiency and renewable generation to build marketable homes that approach zero energy on a net annual basis

  3. Clarum Homes: Vista Montaña 257 Homes, All ZEH Mix: SF Attached & Detached Affordable, Entry, Move-Up Over 60% sold before grand opening No marketing used, only press from ZEH Pardee Homes: Soleil 100 homes 10% ZEH Standard 30% PV Standard ZEH Option

  4. Morrison Homes: Lakeside 10% of homes ZEH, Also available as option Excellent press, traffic $18,000 premium, selling all ZEH lots • Premier Homes: Premier Gardens • 94 homes, all ZEH • Some entry-level homes • Excellent press and traffic • 350 people on waiting list

  5. Centex Homes Zero Energy Case Study • Approach • First study the market to determine buyer attitudes toward energy efficiency • Design and construct a pilot ZEH • Develop a refined design with optimized economics • Revise the design with builder input • Build, test, and market

  6. Sequential Analysis Results

  7. Measures Adopted • Zero defect wall insulation (CertainTeed Optima®--R13 with 2x4 framing) • High performance windows • Tight construction • Insulated headers • Tightly sealed ducts • R49 attic insulation • Buried ducts (~R14) • Tankless water heater • Fluorescent lighting • Ventilation Cooling (NightBreeze) • 12 SEER A/C & variable speed furnace • 2.4 kW building-integrated PV

  8. Key Elements--California ZEH • Well designed efficiency package • State or Utility buy-down of PV • Utility net metering • Utility time-of-use rate • Building integrated PV (more development needed) • Better to sell as standard, not option

  9. California PV Market • Electricity prices: • $0.11 to $0.13/kWh flat rate • over $0.30/kWh on peak with TOU pricing • net metering in effect • California PV buy-down: • Now $2.80 per watt, limited pot • Drops ~ $.20 per watt every 6 months • “Million Solar Homes” program supported by governor • failed in August, but it will be back... • 7.5% California renewables tax credit • Nothing for solar thermal

  10. California Energy Commission ZEH • The CEC $10M RFP for ZEH development • Near term goals: • 70% reduction in electricity bills • $5,000 incremental cost to homeowner • 1 kW peak demand • Long term goals: • 100% reduction in energy bills • no incremental cost to homeowner • zero peak demand • No provisions for space heating

  11. Bringing First Costs Down • Equipment cost reduction: • increased volume, economies of scale • new, lower cost technologies • improved installation methods (BIPV) • Builder reduces costs: • free advertising • due to improved supply chain • through simplified entitlement process

  12. Bringing First Costs Down • Utility finances PV system: • Loan all or a portion of system cost to homeowner • Recoup costs in new section of energy bill • if net metering is in effect, loan amount could be larger without increasing energy bill vs. conventional system • loan could be paid with renewable energy credits (RECs) or carbon credits. • DEG utility partners are interested

More Related