Jesse Krivolavek Nebraska Native American Energy Auditors Veterans Dr Ste. 600, Omaha, NE 68022

Transcription

1 Jesse Krivolavek Nebraska Native American Energy Auditors Veterans Dr Ste. 600, Omaha, NE HERS Rater HERS Instructor National HERS QA Delegate BPI Building Analyst Energy Star Verifier EPA Water Sense Inspector DOE Home Energy Score Qualified Assessor Omaha High Performance Home Verifier Local Building Scientist

2 GOALS of Presentation Review IECC 2009 Code Changes effective in the State of Nebraska for homes permitted on or after August 27, 2011 Explain IECC 2012 Code Changes looming in the near future for some local jurisdictions Explain options that provide compliance PRESCRIPTIVE vs. PERFORMANCE HERS, CHPH, Energy Star, the Tax Credit

3 Energy Codes Defined Energy codes are the rules that governing the construction process related to reducing energy Energy Codes are currently updated every three years Latest active edition for energy is the IECC 2012 States, jurisdictions and municipalities adopt and enforce codes differently The local Energy Code is the worst home that can be legally built

4 Code History MEC 1992, 1993, 1995 Early energy codes, complicated, Double Pane windows were req. IECC 98, 2000, 2003 Strengthening, SHGC of 0.4 req. where < 3500 HDD IECC 2004, 06 Simplification, Fewer CZ s, eliminate % glazing, certificate req. IECC 2009 Duct & Envelope Tests, Efficient Lighting ARRA mandated IECC 2012 We will go over this list The Code kept raising the bar about 1-3%, until more recently Code is about 15% more stringent than 2006 version 2012 Code is about 30% more stringent than 2006 version 2015 Code target is 50% > than 2006 version

5 Benefits of Energy Codes Save Energy - Buildings consume 40% of energy in United States Energy Codes reduce dependence on foreign energy sources Save Money- Energy costs continue to escalate Energy Codes help keep money within local economy Additional Benefits: Increases comfort, health and durability of homes Increases value of homes in local community Reduces liability for builder and subcontractors

6 IECC Codes Tips CODE TIP #1: Your inspector s interpretation of the Code is the Code CODE TIP # 2: Chose your Path Carefully Prescriptive Performance

7 Review IECC 2009 Certificate required on circuit box Performance or Prescriptive path options IECC Requirements for Both Paths Referred to as mandatory provisions: 401: Select Path and Post Certificate 402.4: Reduced Air Leakage

8 Mandatory 2009 IECC Requirements for Both Paths 402.5: Maximum Fenestration 403.1: Controls Programmable Thermostat : Duct Sealing and testing if outside : Building Framing Cavities SHALL NOT BE USED as SUPPLY Ducts : Mechanical System Piping must be R : Circulating Hot Water Sys must have R : Mechanical Ventilation 403.6: Equipment Sizing in Accordance with Section M of the IRC

9 Prescriptive 2009 review Nebraska becomes only Climate Zone 5 No HVAC trade offs for insulation Lighting 50% HE Ceiling R-38 Windows U-.35 Walls R-20, 13+5 Floors R-30 Foundations R-10/13

10 Summary of 2012 Changes About 30% better than IECC 2006 Major Changes Consolidated with IRC energy chapter (actually a change to the IRC, not the IECC) Mandatory whole-house pressure test More stringent duct leakage test DHW distribution system requirements Key Non-Changes Retains prohibition on envelope-equipment trade-offs Makes 75% HE lighting requirements mandatory

11 IECC 2012 Code Changes 2012 IECC Prescriptive Measures

12 IECC 2012 Code Changes IECC Prescriptive Measures

13 What window stickers that Raters need to verify look like in real life

14 What all attics look like in real life

15 What Grade 1 above grade wall insulation looks like in real life

16 What draped foundation wall insulation looks like in real life

17 IECC 2012 Code Changes PRESCRIPTIVE PATH - SAMES 2009 allowed NO MORE TRADE OFF FOR EQUPMENT TO INSULATION (same) Key Notes: 15 sq ft exemption, which means a 4x4 block window will not qualify (same) Supply Ducts in Attic shall be R-8 (same) All other Ducts shall be R-6 (same) Slab Edges will need R-10 x 2 below grade (same - all walkouts must still meet this in prescriptive)

18 What unconditioned space ducts look like in real life

19 What slab edge insulation looks like in real life

20 IECC 2012 Code Changes IECC Requirements for Both Paths Referred to as mandatory provisions: 401: Select Path and Post Certificate (and signage if you if you want recognition for going above and beyond)

21 IECC 2012 Code Changes IECC Requirements for Both Paths Referred to as mandatory provisions: 402.4: Air Leakage TESTING at -50 Pascal 3 Air Changes per Hour or less (3 ACH) - blower door test required out of the last 500 new homes AEA tested only 27% meet this level of tightness Example: 2,000sq-ft... or 17,500cu-ft (times) 3ACH (divided by) 60min = 850cfm50

22 How we test infiltration in real life

23 IECC 2012 Code Changes IECC 2012 Requirements for Both Paths : Duct Sealing Leakage Testing required for ducting outside of conditioned envelope and in 2012 it s 50% tighter 4 cfm25/100sqft for Rough in or Post Construction 3 cfm25/100sqft for rough-in without air handler : Building Framing Cavities SHALL NOT BE USED AS as Ducts or Plenums Returns need to be ducted even inside cavities

24 How we test duct leakage in real life

25 IECC 2012 Code Changes IECC 2012 Requirements for Both Paths 403.5: Mechanical Ventilation required with gravity dampers that close when system is off 403.6: Equipment Sizing in Accordance with ACCA Manual S based on building loads calculated to ACCA Manual J or other approved heating and cooling load calculations : Lighting minimum of 75% of lamps must be high-efficacy currently 50% via prescriptive

26 How to Performance Path Performance Path HERS Rater Building Modeling 1. Find a HERS Rater and send him your drawings and equipment selections one week before permitting 2. Your Rater computer models the home and provides you with IECC Compliance Report and Certificate to Post 3. Your Rater inspects insulation before drywall and runs blower door and duct blasting tests after trim is installed 4. Worry no more about the Prescriptive Tables 5. Your Rater provides building science consulting on structural options, best practices and warranty concerns 6. Your Rater helps you qualify for available tax credits and various High Performance Home Certifications

27 Performance Path Performance Path HERS Rater Building Modeling Find a HERS Rater and send him your drawings and equipment selections one week before permitting

28 Performance Path Performance Path HERS Rater Building Modeling Your Rater computer models the home, provides you with a projected rating, cost-effective improvement analysis, best practices, IECC Compliance Docs for permitting and the IECC Certificate to Post

29 Performance Path Performance Path HERS Rater Building Modeling Discuss Cost Effective Options for Mandatory Requirements Worry no more about the Prescriptive Tables Your Rater inspects insulation before drywall (heads off obvious future warranty concerns) and runs blower door and duct leakage test after trim is installed (duct testing can be done at rough in)

30 Performance Path Performance Path HERS Rater Building Modeling Your Rater helps you qualify for available tax credits and various High Performance Home Certifications

31 New Incentive 3 weeks ago Congress extended the $2,000 tax credit for builders who build energy efficient homes by a bipartisan vote 89-8 in the Senate and in the House The extension was part of the compromise legislation aimed at averting the fiscal cliff The legislation extends the credit through December 31, 2013 and retroactively to January 1, 2012 The only difference is that the 50% btu reduction will be based versus the IECC 2006 instead of the IECC 2003 which is almost identical in Omaha and Lincoln

32 What a $2000 per home tax credit looks like, except it will say

33 Where to learn more Ask your HERS Rater Buy the Book Review some the 39 GREAT presentations stored on the Nebraska State Energy Office website from the Oct 2012 Great Plains Codes Conference: es.htm Play with the DOE Building America Solutions Center BETA program: