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2012 International Energy Conservation Code (Residential) Isaac Elnecave Senior Policy Manager Midwest Energy Efficiency Alliance

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Page 1: Iecc Code Workshop

2012 International Energy Conservation Code

(Residential)

Isaac Elnecave Senior Policy Manager

Midwest Energy Efficiency Alliance

Page 2: Iecc Code Workshop

Purpose

Compare the Recently Published 2012 International Energy Conservation Code (IECC) 

with the 2009 and 2006 Editions

Page 3: Iecc Code Workshop

Plan

• What is MEEA• What is the Energy Code • Brief Description of Code Development Process

• Status of Residential Energy Codes In Midwest• Energy Savings • Comparison of 2006,2009 and 2012 IECC• Final Thoughts

Page 4: Iecc Code Workshop

MEEA’s Role in the Midwest• Nonprofit serving 13 Midwest states• 10 years serving utilities, states and communities• Staff of 24 in Chicago• Actions

– Advancing Energy Efficiency Policy– Designing & Administering EE Programs – Delivering Training & Workshops– Coordinating Utility Program Efforts– Regional Voice for DOE/EPA & ENERGY STAR– Evaluating & Promoting Emerging Technologies

Page 5: Iecc Code Workshop

What Is The Energy Code

• Energy Codes are the rules governing the types of construction process related to reducing energy use in a home. 

• Worst home that can be built. • National Model Codes (Typically IRC/IECC)• Updated Every 3 Years (Level of Improvement Varies)• States/Municipalities Adopt/Enforce the Code• Current Edition is the 2012 IECC

Page 6: Iecc Code Workshop

Residential Building Energy Code Adoption in the Midwest

Statewide Adoption of IECC Versionor Equivalent

Voluntary / Precedes 2006

2006

In Process to 2009

2009

June 2011

2009 Adopted by Major Municipality

* * Weakening Amendments Proposed

Page 7: Iecc Code Workshop

Code Development Process

• New Code Published Every Three Years• Residential and Commercial Code Now Considered Separately

• Amendments Accepted from All Parties• Code Development Committee Vets/Votes on all Amendments

• Proponents and Opponents Given Opportunity to Present Case

Page 8: Iecc Code Workshop

Code Development Process

• After Development Committee Votes; Proponents and Opponents can propose modifications to amendments. 

• At Final Action Hearing, a second vote is taken on each amendment. 

• Only State and Local Code Officials Can Vote• Proponents and Opponents Have Another Chance to State Case. 

Page 9: Iecc Code Workshop

Key Points

• 2012 IECC Roughly 30% More Energy Efficient than 2006 IECC (on a national basis)

• 2012 IECC Roughly 15% More Energy Efficient than 2009 IECC (on a national basis)

• Chapter 11 of the 2012 International Residential Code Exactly the Same as Residential Chapter of the 2012 IECC 

• IECC Format Changed – Split into Full Commercial and Residential Sections

Page 10: Iecc Code Workshop

Key Changes to Energy Code • Air Infiltration/Blower Door Testing• Duct Testing • Window U‐Factor and Solar Heat Gain Coefficient• Wall/Ceiling Insulation• Efficient Lighting• Whole House Mechanical Ventilation• Piping Insulation• Minor Changes

Page 11: Iecc Code Workshop

Air InfiltrationInfiltration Req. Notes 

2006 IECC None Requires Sealing a List of Specified Items such as utility penetrations and attic access openings (actual list is longer) 

2009 IECC 7 ACH50 or Checklist Checklist Based on Energy Star Thermal Bypass checklist 

2012 IECC  3 ACH50 & Checklist Blower Door Test Can Be Done Anytime After Creation of Building Envelope Penetrations

Page 12: Iecc Code Workshop

Ducts

Leakage Requirement

Rough In Leakage Rate  Post‐Construction Leakage Rate 

2006 IECC Code Requires Ducts to be Sealed but Does not Require a Test

2009 IECC • 6 CFM25 Total

• 4CFM25 if Air Handler not installed

• 8 CFM25 to Outdoors

• 12CFM25 Total

2012 IECC  • 4 CFM25 Total

• 3 CFM25 if Air Handler not installed 

• 4 CFM25 Total

Notes:  NO TEST REQUIRED if DUCTS AND AIR HANDLER ARE ENTIRELY IN CONDITIONED SPACE

LEAKAGE RATES ARE MEASURED PER 100 SQ. FT.

Page 13: Iecc Code Workshop

Window U-Factor

Window U‐Factor

Skylight U‐Factor

Solar Heat Gain Coefficient

2006 IECC 0.40 0.60 NR2009 IECC  0.35 0.60 NR2012 IECC  0.32 0.55 0.40Notes: Energy Star Windows are at U‐Factor of 0.30

Page 14: Iecc Code Workshop

Wall/Ceiling Insulation (R-Value)

Above Grade Wall 

Ceiling  Mass Wall

2006 IECC 13 38 52009 IECC 13 38 5/102012 IECC  20 or 13+5 49 8/13Notes No change to building foundation wall insulation.

Raised Heel Trusses are not necessary. 

Page 15: Iecc Code Workshop

LightingEfficient Lighting Requirement

2006 IECC None2009 IECC  50% of Lamps2012 IECC  75% of Lamps or Permanently Installed 

FixturesNotes High Efficacy Lamps Defined as 

• Compact Fluorescent Lamps• T‐8 or Smaller for Linear Fluorescent Lamp

• 60 lumens/watt for lamps over 40 watts• 50 lumens/watt for lamps between 15 and 40 watts

• 40 lumens/watt for lamps under 15 watts

Page 16: Iecc Code Workshop

Ventilation• Whole House Continuous Mechanical Ventilation Required (Meet Either M1507 of IRC or   of IMC)

• IRC similar to ASHRAE 62.2/IMC requires 0.35 nACH• Ventilation can be Exhaust Only, Supply Only or a Combination 

• Local Exhaust or Supply can Qualify (must meet ventilation rate shown in next slide) 

• Outdoor Air Ducts Connected to Return Side of Air Handler Qualifies as Supply

• Fans Must Meet CFM/Watt Requirements

Page 17: Iecc Code Workshop

Ventilation Rates

Dwelling Unit Floor Area (sq. ft)

Number of Bedrooms 

0‐1 2‐3 4‐5 6‐7 >7

Airflow in CFM

< 1500 30 45 60 75 90

1,501 – 3,000 45 60 75 90 105

3,001 – 4,500 60 75 90 105 120

4,501 – 6,000 75 90 105 120 135

6,001 – 7,500 90 105 120 135 150

> 7,501 105 120 135 150 165

Page 18: Iecc Code Workshop

DHW Piping Insulation • R-3 Required on Piping

– Greater than 3/4 “ nominal diameter– Serving more than 1 dwelling unit– From water heater to kitchen outlets– Located outside the conditioned space– From water heater to distribution manifold– Under the floor slab– That is buried– That is supply and return in recirculating systems other than

demand recirculation systems– That have run lengths longer than the chart below

Nominal Pipe  Diameter of LargestDiameter Pipe in the Run (feet)

3/8 ½ ¾ > 3/4

Maximum Run Length 30 20  10 5

Page 19: Iecc Code Workshop

Minor Requirements• Programmable Thermostats• Eave Baffles• Clarification of Steel Frame Wall Requirements• Sunroom Insulation • Framing Cavities Cannot Be Used as Ducts or Plenums• Certificates Must Include Results of Testing• Pools and In ground Permanently Installed Spas

– Heaters must have accessible on/off switch– NG not allowed with continuous pilot lights– Time Switches – Vapor Retardant Cover 

Page 20: Iecc Code Workshop

Thoughts on Cost • Duct and Blower Door test very reasonable (Approx: $250)

• Windows have no net cost

• Above Grade Walls: Can use either 2x4 or 2x6 construction including advanced framing

• Ventilation meeting requirements is widely available and affordable. 

• Air infiltration level can be met with basic caulk and seal package along with attention to major sources of air leakage such as penetrations, bathtubs and fireplaces. 

Page 21: Iecc Code Workshop

Energy Savings

• For 2400 sq. ft./ Single Family/One Story/Basement/Kansas City MO

Energy Use /year Energy Cost Savings/year

2006 IECC 146.2 MMBtu

2009 IECC 137.5 MMBtu (8.7 MMBtu) $62/year (over 06)

2012 IECC 113.1 MMBtu (33.1 MMBtu) $548/year (over 06)

Percentage Improvement over 2006 IECC 

2009 IECC 6%

2012 IECC  23%Notes Conservative estimate of savings as 

estimate assumes that current practice of sealing ducts is better than research indicates. 

Air infiltration, duct tightness and above grade walls form the majority of savings .  

Page 22: Iecc Code Workshop

Quick Thoughts

• Adoption of 2012 IECC means:– More energy efficient home– Better quality home (improved IAQ, improved

comfort)– Technology and techniques already available

and in wide use.

Page 23: Iecc Code Workshop

Contact Info

Isaac Elnecave, Senior Policy Manager

Midwest Energy Efficiency Alliance312-587-8390

www.mwalliance.org