2012 Illinois Energy Conservation Code Applications

Transcription

1 2012 Illinois Energy Conservation Code Applications A 2012 IECC Update Comparing Significant Changes of the International Energy Conservation Code 2009 to 2012 Darren Meyers, PE, CEM, GBE, BPI-BA International Energy Conservation Consultants, LLC Education, Building Diagnostics, Energy-Engineering dmeyers@ieccode.com Joseph E. Moore, MCP Assured Construction Compliance, LLC 3 rd Party Plan Review, Inspection, Consulting acc_consulting@sbcglobal.net

2 Today s Agenda 1) Questions About the Law 2) 90% Compliance Is it Attainable in Illinois? 3) 2012 IECC -Residential a) Significant Changes in 2012 IECC b) The Building Analyst s Perspective c) Focus on Simulation-Based Compliance (REM/Rate, REScheck ) 4) 2012 IECC & ASHRAE Commercial a) Significant Changes in 2012 IECC b) ENV, LTG, HIGH EFF, PWR, EQUIP, MECH, SWH, Cx, ECB c) COMcheck 5) 2012 IGCC The Future of Sustainable Code Enforcement

3 Questions About the Law 1

4 BITE Codes Training Program PY = IECC Event = HVAC Event

5 2012 IECC Update 5

6 Enforcement and Compliance (cont.) Q: Do jurisdictions have to enforce the code? A: If municipality or county requires a permit for construction, additions, alterations, renovations or repairs to existing construction Absolutely, YES! Q: What if jurisdictions do not regulate energy efficient construction? A: If a unit of local government does not regulate energy efficient building standards, any construction, renovation or addition to buildings or structures is [still] subject to the provisions in the Act.

7 Application to Home Rule Units Q: Can jurisdictions amend the code? Commercial: Not in a manner that is less stringent than the code established in the EEB Act. However, nothing in the EEB Act prevents adoption of a [commercial] energy code that is more stringent. Residential: Not in a manner that less or more stringent than the code established in the EEB Act. The following may regulate using more stringent standards If adopted 2006 IECC on or before May 15, 2009; and provided CDB with identification of adoption as required by 55 of Illinois Building Commission Act; or The City of Chicago

8 Enforcement and Compliance (cont.) Q: What do I do if I am a designer, contractor or home builder conducting work w/in the scope of the code in a unit of government that neither inspects for nor regulates energy efficient construction? A: If a unit of local government does not regulate energy efficient building standards, any construction, renovation or addition to buildings or structures is [still] subject to the provisions in the Act. Recommendation: Evaluate your risk exposure?

9 9 Why Building Energy Codes?

10 90% Compliance in Illinois 2

11 What about code enforcement?

12 State Compliance Activities as of October 1, 2011

13 44/52 87/79

14 Patterns of Non-Compliance 2009 IECC Duct installations in exterior walls. The evaluation team noted several instances of kitchen exhaust and environmental supply and return duct and stud-cavities located within exterior walls IECC Equipment Sizing. Compliance generally not evident for calculating heating and cooling loads. Where calculations were presented, output of equipment specified and actually installed was substantially greater than load. Many instances where paper compliance varied from that observed on-site IECC Compliance Software Tools. All (8 of 8) of the performance software compliance packages submitted for compliance had enough errors/omissions that significantly affected compliance assessment, field-installation, and inspection.

15 Significant Changes in 2012 IECC Residential 3a

16 U.S. Residential Energy Code History of efficiency improvements

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18 2012 vs Residential The bottom line Chapter 11 in IRC replaced by IECC-R(esidential) Mandatory continuous foam sheathing of exteriors Zones 4 & 5; Better performing, more efficient windows (U-0.32 v. U-0.30 ESTAR ); Every new home will need to pass a blower door test to 5ACH 50 ; Every new home will require mechanical ventilation: For homes tested-out at 5ACH 50 or less, Exhaust, supply, or balanced systems; May 1 st 2013?! - Standards for Residential Furnaces VACATED!!! New SHW pipe insulation and run-length requirements (R-3); More stringent duct leakage thresholds (8CFM 25 to 3CFM 25 ); Building cavities no longer allowed for supply or return air; and Three of every four fixtures shall be high-efficacy lamps (75%).

19 2012 vs The bottom line Chapter 11 in IRC replaced by IECC-R(esidential) Cold-climate builders: Get ready for mandatory foam sheathing; Better performing, more efficient windows; Every new home will need to pass a blower door test to 5ACH 50 ; Mechanical ventilation required for homes tested 5ACH 50 or less; New SHW pipe insulation and run-length requirements (R-3); Increased stringency of duct leakage thresholds; Building cavities no longer allowed for supply or return air; Three of every four fixtures shall be high-efficacy lamps (75%);

20 Scope Residential Buildings and building sites, associated systems and equipment. Commercial Buildings and High-Rise Multifamily International Residential Code 22

21 R Scope & Mixed Occupancy Each occupancy shall be separately considered residential or commercial Condominiums Condominiums Apartments Building is now 4 stories. Commercial Provisions throughout Residential Residential Retail Retail Apartments Commercial /Residential

22 Def n THERMAL ISOLATION SUNROOMS Sunrooms One-story structure >40% glazed wall and roof area. Must meet insulation requirements of code or be thermally isolated. Physical and space conditioning separation from conditioned spaces. The conditioned spaces shall be controlled as separate zones for heating and cooling or conditioned by separate equipment.

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24 2012 RECA Compliance Guides for Illinois Homes FREE Field Compliance Guides

25 Changes to Insulation Requirements

26 T Footnote h Slide h First value is cavity insulation, second is continuous insulation or insulated siding, so 13+5 means R-13 cavity insulation plus R-5 continuous insulation or insulated siding. If structural sheathing covers 40 percent or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R-3 in the locations where structural sheathing is used to maintain a consistent total sheathing thickness.

27 R Raised Truss Clarification (R-Value Reduction Over Entire Attic Field) The R-30 for R-38 or R-38 for R-49 substitution is applied across the entire attic field (not just at the wall line-to-eave extension). INSULATION

28 Changes to Window Performance

29 R NFRC U, SHGC, VT R402.3 Area-Weighted Avg.

30 EC28-06/07 Vapor Retarders Dr. Joe Lstiburek, Building Science Corporation

31 R Eave Baffle For air-permeable insulations in vented attics SOFFIT BAFFLE (VENTILATION CHUTE) EAVE BAFFLE (WIND BLOCK) CELLULOSE INSULATION INTERIOR DRYWALL EXTERIOR STUD WALL

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34 R Sealing the Building Envelope Align the pressure and thermal boundaries w/ wrapping materials

35 R Fireplaces T Fireplace doors New wood-burning fireplaces shall have tight-fitting flue dampers and dedicated outdoor combustion air. Fireplace doors. Gasket? (see UL127-08)

36 Advanced Rim/Band Air-Leakage and Insulation Measures Spray Foam Application R-Board Sealed-In-Place

37 Knauf Insulation's EcoSeal Spray Low-odor, low-voc sealant dries to flexible tough film

38 IRC R303.4 Mechanical Ventilation IRC M Whole House Ventilation 43

39 IRC R303.4 Mechanical Ventilation IRC M Whole House Ventilation 44

40 Calculating a 62.2 Ventilation Rate CFM fan = 0.01A floor + 7.5(Number bedroom + 1) + (alternative compliance supplement) - (infiltration credit) Base formula, step by step: Multiply the number of bedrooms + 1 or the number of people by 7.5 CFM per person: 4 people * 7.5 CFM/person = 30 CFM Calculate 1 CFM per 100 square feet of floor area: 1500 ft2/100 ft 2 per required CFM = 15 CFM Add them together: 30 CFM + 15 CFM = 45 CFM continuous

41 DEFINITION Def n WHOLE HOUSE MECHANICAL VENTILATION SYS An exhaust system, supply system or combination thereof [balanced] designed to mechanically exchange indoor air with outdoor air.. operating continuously or intermittently.. to satisfy whole house ventilation rates. Exhaust-only System 46

42 Def n WHOLE HOUSE MECHANICAL VENTILATION SYS Supply-only System 47

43 Def n WHOLE HOUSE MECHANICAL VENTILATION SYS Integrated [Balanced] System HRV or ERV 48

44 System Types, Geography, Climate Restrictions Hot, Humid Climates Exhaust-only systems shall not exceed 7.5 cfm/100 ft 2 of CFA. Very Cold Climates Mechanical supply systems exceeding 7.5 cfm/100 ft 2 of CFA, prohibited. 49

45 R403.6 Equipment Sizing ACCA Manual J, Manual S Manual J8 th is only used to calculate the heating and cooling loads. Manual J8 th guides HVAC designers to use ACCA Manual S to select equipment that is the right size (see 10-4 of Manual S). Manual S sets equipment sizing limits, as summarized in Table 1.

46 R Hot water pipe insulation Hot water piping must be insulated to at least R-3 as follows: 1. Piping is larger than 3/4 in nominal diameter, 2. Piping serves more than one dwelling unit, 3. Piping runs from water heater to kitchen outlets, 4. Piping is located outside of conditioned space, 5. Piping runs from water heater to a distribution manifold, 6. Piping is located under a floor slab, 7. Piping is buried, 8. Supply and return piping is in recirculation systems other than demand recirculation systems, 9. Piping run exceeds the following maximum run lengths:

47 R404.1 Three of every four fixtures shall be high-efficacy lamps A minimum of 75% of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps.

48 Significant Changes 2012 Performance-Based Compliance 3b Matthew Brown, CGP, HERS Rater Energy Diagnostics Inc. Ph Darren Meyers, PE, CEM, GBE, BPI-BA International Energy Conservation Consultants Education, Building Diagnostics, Energy-Engineering

49 R405 Simulation Software (Performance Alternative) Neither ICC nor DOE review or approve specific software. Section 405 and tables R (1) & R (2) set the Rules to the Game for how the software must calculate compliance. Some more commonly known software are: REM/Rate, REM/Design EnergyGauge USA Residential, EnergyGauge Commercial MICROPAS California Residential Energy Standards (a.k.a., Title-24) REScheck and COMcheck are Total UA Trade-Off Tools Not Simulation Software. Some software offer s more flexibility than others: REM/Rate and EnergyGauge can use data from building diagnostic testing to allow for flexibility and an as installed approach to meeting code.

50 R405 Simulation Software Neither ICC nor DOE review or approve specific software. For 2009 IECC use REM/Rate v For 2012 IECC use REM/Rate v

51 Evaluating Performance Software Submittals Permit Review 1) 2012 IECC Building File Report [Projected] 2) 2012 IECC Reference Building File Report [Projected] 3) 2012 IECC Annual Energy Cost Compliance [Projected] 4) Inspection Checklist 5) Certificate [Preliminary] Certificate of Occupancy 1) 2012 IECC Building File Report [Confirmed] 2) 2012 IECC Reference Building File Report [Confirmed] 3) 2012 IECC Annual Energy Cost Compliance [Projected] 4) Air Leakage Report, a) ACHnat, ACH50, Duct Leakage b) IRC /ASHRAE 62.2 compliance 5) Certificate [Confirmed] 6) HERS Certificate [as necessary]

52 $16

53 Utility Rates are set the same for the reference home and the as designed home. Rates are derived from the utility serving the address. Climate Location tells the software what climate zone to use, HDD, CDD, and the design conditions to use. Derived from ASHRAE and consistent with IECC.

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55 Above Grade Wall Library details the components of the wall assembly including attributes such as cavity R- value, framing types and dimensions, and framing factors. Location tells software how to load the wall assembly. Inspectors note: Verify Correct entries for Continuous and Cavity insulation. The Performance allows for use of items such as sheathing and air films, where the prescriptive path does not. Verify correct framing factor is used.

56 Field Inspector Note. Is this building framed w/ Advanced Framing? Insulated box headers vs. sawn-lumber, single top plates, three-corner studs w/ clips? No framing technique allows 85/15. 64

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58 ASHRAE/IECC Framing Correction Factors Standard Framing Attic roofs: 85% full-depth insulation, 5% half-depth insulation, and 10% joists. Walls: Double headers leave no cavities. 75% insulated, 21% studs/ plates/sills, 4% headers. Floors: 91% insulated cavity and 9% framing. Advanced Framing (OVE) Attic roofs: 90% full-depth insulation and 10% joists. Walls: Double headers leave uninsulated cavities. 78% insulated, 18% studs/ plates/sills, 4% headers. Floors: 91% insulated cavity and 9% framing.

59 Wall Insulation Grades I-III Grade I Grade II Grade III R-Value as labeled. Insulation makes full contact w/ all sides of wall framing. No indentations or gaps. Insulation is cut-to-fit around plumbing and wiring. 2% R-0, 98% R-Value as labeled. Insulation mostly making contact with all sides of framing. Some indentations and compressions of the insulation. 5% R-0, 95% R-Value as labeled. Insulation has multiple gaps and compressions. Insulation was not cut to-fit around plumbing or wiring.

60 Field Inspector Note. Same house So, what s different?

61 Honeywell VisionPro IAQ Thermostat The VisionPRO IAQ touch-screen universal programmable thermostat provides electronic control of 24 Vac heating and cooling systems in addition to humidification, dehumidification and ventilation all with just 3 wires to the thermostat. $ For a 2,000 ft 2 home max leakage is 4 cfm / 100 ft 2 (2,000/100) x 4 = 80 cfm max leakage 40 cfm < 80 cfm PASSES!

62 Thank you! Copyright Materials This presentation is protected by U.S. and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of IECC LLC is prohibited. International Energy Conservation Consultants 2012 Thermal Imaging Services of Central Illinois 2012