NetZero & Hearth ProductsCalifornia Energy Commission

• Climate zones• Appliance standards• TDV – Time Dependent Valuation• LCC – Lest Cost Calculation• 2007 Energy plan - • The Role of the IOU’s - CASE• Compliance Software -The “Engine” • Calgreen• PIER

CEC• Est. 1974 – 6 Divisions Charged with:

– Forecasting future energy needs– Licensing power plants– Promoting Energy Efficiency- Appliances &

Buildings – support local Gov Enforcement– Support Renewable Energy, Solar Electric– Public Interest Energy Research ($83Mill)– Planning for Energy Emergencies (2000)– AB 32 Lead Agency - Greenhouse Gas

Policy Goal – Flat per Capita Energy Consumption

Per Capita-by State

(Click graph for details)

California System Status June 27, 2011

Additional Objectives 2013 Code

• Achieve big step towards Zero Net Energy codes in 2020 (res) & 2030 (nonres) -15-25% improvement in Standards

• Include CEC Approved Reach Standards -propose for Energy Chapter of Title 24, Part 11 (Green Building Code)

• Align with CBSC triennial code update

16 Separate Climate ZonesEach with Separate “issues” for buildings

Time Dependent Valuations-TDV

Time Dependent Valuations - TDV

TDV Thermostats

• CEC Staff presumes hourly pricing of electricity

• Staff assumes thermostats will collect hourly data, & meters will charge by hour

• Staff assumes ‘stats’ will have modems & communicate, internally & externally

• Almost made it into the 2008 code

Least Cost Calculation-LCC

• Equation for Life Cycle Cost Analysis• ΔLCC = Cost Premium – Present Value of

Energy Savings• or• ΔLCC = ΔC – ΔTDV $• Objective is to find measures with negative

ΔLCC

LCC

LCC

LCC

IOU’s & “CASE”• California Investor Owned Utilities = IOU• California Codes and Standards Group –

– www.calcodesgroup.com• “The Codes and Standards program directs

initiatives that will enhance building and appliance standards to codify and implement cost effective, reliable and verifiable demand side measures in support of maximizing portfolio savings.”

• Edison, So. Cal Gas, PG&E, San Diego Gas

Current Res CASE list

• Envelope Cool roofs• Roof insulation• Advanced building framing and envelope• Windows• Compressorless homes• Infiltration and testing• HVAC Zone air conditioning• Ventilation and economizing

CASE list- cont.• Base case efficiency• Duct pressure drop and testing• Solar oriented developments• Solar ready homes• Solar water heating• DHW and distribution systems• Water heater standing losses• Plug loads Lighting• Plug load controls

Compliance Software – California Simulation Engine (CSE)

• All parts of opaque surfaces (frame and cavity) are calculated separately as mass elements (walls, floors, ceilings, interior walls, furniture)

• Separate radiant and variable convective heat transfer for all surfaces

• Pressure flow air flow network for infiltration, ventilation and HVAC interaction

• ASHWAT window model with hourly variable properties and interaction with interior and exterior shades

CSE – Duct Loss, 1 Key Portion

Slightly modified 2008 UZM– All or part of the duct system in the attic zone– Convection and radiation between ducts and

attic air and surfaces– Leakage from/to attic air

•Unbalanced duct leakage assumed for standard cases

•Ventilation and infiltration between house and attic by air network

CalGreen• Part 11 of Title 24 (State Building Code)• Focuses on Water use, also Building

construction waste & Recycling, HVAC training• Environmental Quality Section – IAQ

– “Requires gas fireplaces to be direct-vent, wood and pellet stoves to comply with EPA limits or comply with a local ordinance, whichever is more prohibitive. “

(Green Technology Summit, June 2011)• Whole House Ventilation Systems

PIER• Public Interest Energy Research

– Funded by “Public Good” charge on all IOU utility bills, - 1998-2005 = $6.4 Billion

• Bulk stays with Utilities (80%?)• CEC administers R & D, with input from

California Public Utilities Commission (CPUC), Workshop July 11, 2011 for-

• Long-Term Energy Efficiency Strategic Plan (CEESP)

Tentative Outline-Energy Codes• 2013 Code

– Nov ‘09-Oct ’10, Pre Rulemaking, CASE studies– Oct ’10-Dec ’10, 1st workshops– Feb-July ’11, Staff workshops, 1st Draft standards– July-Sept ’11, receive comments, 2nd Draft– March 1, ’2012, CEC adopts Code– April ’12 – Dec ’13, finish compliance manual &

software, trainings,– January 1, 2014, Effective Date

• 2016 Code– Fall 2012-2013, Pre Rulemaking