2009 versus 2012 IECC Maryland Affordable Housing Coalition June 26th, 2012

2009 versus 2012 IECC Overview Reading the Code on Your Own Compliance Paths Low-rise Construction (Residential Code) – Envelope, Air-sealing, Mechanical Mid-rise Construction (Commercial Code) – Envelope, Air-sealing, Mechanical, Electrical, Extras 2 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Some aspects of 2012 have been relaxed Opportunities exist to cost-effectively implement aspects of 2012 The 2012 is ~ 10-15% more efficient than 2009 The 2012 is ~ 30% more efficient than © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Reading the Code Must read chapter by hierarchy – Understand each section by its context – Like finding the best “grape” of knowledge 4 © 2011 Steven Winter Associates, Inc. All rights reserved Residential ChapterCommercial Chapter 2009 IECCChapter 4Chapter IECCChapter R4Chapter C4

2009 versus 2012 IECC Reading the Code 5 © 2011 Steven Winter Associates, Inc. All rights reserved Section 401: Intro Section 402 Section 403 Section 404 Section Building Thermal Envelope: Air-sealing

2009 versus 2012 IECC Two Generic Compliance Methods to either code 6 © 2011 Steven Winter Associates, Inc. All rights reserved Mandatory Residential Measures Prescriptive Pathway Performance Pathway OR

2009 versus 2012 IECC Two Generic Compliance Methods to either code 7 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Pathway Performance Pathway Envelopes Prescriptive By Component Performance By Component UA- Alternative Mandatory Residential Measures

2009 versus 2012 IECC Low-Rise, Wood-Framed Construction – Envelopes: Prescriptive by Measure 8 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Low-Rise, Wood-Framed Construction – Envelopes: Performance by Measure 9 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Low-Rise, Wood-Framed Construction – Envelopes: Performance by Measure 10 © 2011 Steven Winter Associates, Inc. All rights reserved If already using blown ceiling insulation and roof/ ceiling trusses are 24” O.C., then the project is nearly meeting this requirement. Only ½” extra needed.

2009 versus 2012 IECC Low-Rise, Wood-Framed Construction – Envelopes: UA Alternative Compliance – Can exceed insulation on a component to trade- off for another – Example: 1000 Sqft House, over crawlspace 11 © 2011 Steven Winter Associates, Inc. All rights reserved ComponentProposed WallsR-13 CeilingR-60 FloorR-30 WindowsU IECC R-20 R-48 R-19 U-0.35 Surface Area ComponentProposed UACode UA Walls8559 Ceiling1726 Floor3547 Windows4753 Total183185

2009 versus 2012 IECC Two Generic Compliance Methods to either code 12 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Pathway Performance Pathway Mandatory Residential Measures OR

2009 versus 2012 IECC Low-Rise, Wood-Framed Construction – Performance “Whole” building: Includes heating, cooling, and hot water LOADS. – HVAC efficiencies do not improve performance approach results – Variety of available energy models: commercial and public RESCheck (free) EnergyGauge REMRate 13 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing 14 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Pathway Performance Pathway Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mandatory Items Testing Mandatory Residential Measures

2009 versus 2012 IECC Locations for Air-Sealing: – Any two separate materials at boundary conditions have gaps that will leak air 15 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing differences 16 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing testing methodology, standard home 17 © 2011 Steven Winter Associates, Inc. All rights reserved Negative Pressure

2009 versus 2012 IECC Air-sealing testing methodology 18 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing testing methodology, multifamily home 19 © 2011 Steven Winter Associates, Inc. All rights reserved Negative Pressure

2009 versus 2012 IECC Air-sealing methods 20 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing methods 21 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Mechanical Measures 22 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Pathway Performance Pathway Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mandatory Items Testing Mechanical Duct Leakage Air-Handler Leakage Piping Mandatory Residential Measures

2009 versus 2012 IECC Mechanical Measures 23 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Mechanical Measures 24 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Mechanical Measures, Duct Leakage 25 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Lighting High Efficiency = CFLs or – 60 lumens per watt for lamps over 40 watts – 50 lumens per watt for lamps btwn watts – 40 lumens per watt for lamps btwn <15 watts 26 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Commercial Code (4 Stories and Taller) 27 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Code Organization 28 © 2011 Steven Winter Associates, Inc. All rights reserved Mandatory Commercial Measures Prescriptive Performance Air-sealing Mechanical Additional Efficiency OR Lights

2009 versus 2012 IECC Envelopes 29 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Performance Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mechanical Additional Efficiency Mandatory Commercial Measures Lights

2009 versus 2012 IECC Envelopes 30 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Air-sealing 31 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Performance Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mechanical Additional Efficiency Mandatory Commercial Measures Lights

2009 versus 2012 IECC Air-sealing 32 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Envelope 33 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Mechanical Systems 34 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Performance Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mechanical Commissioning Min HVAC Performance Additional Efficiency Mandatory Commercial Measures Lights

2009 versus 2012 IECC Mechanical Systems 35 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Commissioning 36 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Commissioning 37 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Commissioning 38 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Lighting 39 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Performance Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mechanical Commissioning Min HVAC Performance Additional Efficiency Lights Mandatory Commercial Measures

2009 versus 2012 IECC Lighting 40 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Lighting – “Bulbs” not Fixtures – Hole in 2009 allowed exterior lighting to be irrelevant for high-rise buildings 41 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Lighting 42 © 2011 Steven Winter Associates, Inc. All rights reserved Prescriptive Performance Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing Mechanical Commissioning Min HVAC Performance Additional Efficiency Lights Performance HVAC Performance Lighting Renewables Mandatory Commercial Measures

2009 versus 2012 IECC Additional Efficiency – Performance HVAC 43 © 2011 Steven Winter Associates, Inc. All rights reserved OR

2009 versus 2012 IECC Additional Efficiency – Performance Lighting 44 © 2011 Steven Winter Associates, Inc. All rights reserved OR

2009 versus 2012 IECC Additional Efficiency – Performance Lighting 2kW system costs about $11,000 before rebates 45 © 2011 Steven Winter Associates, Inc. All rights reserved

2009 versus 2012 IECC Questions? 46 © 2011 Steven Winter Associates, Inc. All rights reserved