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transcript
Darren Meyers, PE, CEM, GBE, BPI-BA Joseph E. Moore, MCP
International Energy Conservation Consultants, LLC Assured Construction Compliance, LLC
Education, Building Diagnostics, Energy-Engineering 3rd Party Plan Review, Inspection, Consulting
dmeyers@ieccode.com acc_consulting@sbcglobal.net
2012 Illinois
Energy Conservation Code Applications
A 2012 IECC® Update
Comparing Significant Changes of the
International Energy Conservation Code® 2009 to 2012
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 90.1-2010 - 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
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.
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
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?
Patterns of Non-Compliance
2009 IECC 403.2.1 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.
2009 IECC 403.6 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.
2009 IECC 405.4.1 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.
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-0.30ESTAR);
Every new home will need to pass a blower door test to 5ACH50;
Every new home will require mechanical ventilation:
For homes tested-out at 5ACH50 or less,
Exhaust, supply, or balanced systems;
May 1st 2013?! - Standards for Residential Furnaces VACATED!!!
New SHW pipe insulation and run-length requirements (R-3);
More stringent duct leakage thresholds (8CFM25 to 3CFM25);
Building cavities no longer allowed for supply or return air; and
Three of every four fixtures shall be high-efficacy lamps (75%).
2012 vs. 2009…
Residential … The bottom line
2012 vs. 2009 … 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 5ACH50;
Mechanical ventilation required for homes tested 5ACH50 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%);
Scope
Residential Buildings and building sites, associated systems
and equipment.
Commercial Buildings and High-Rise Multifamily
International Residential Code®
22
R101.4.6 – Scope & Mixed Occupancy
Each occupancy shall be separately considered residential or
commercial
Condominiums
Apartments
Retail
Residential
Residential
Commercial
Condominiums
Building is now 4 stories. Commercial Provisions throughout
Condominiums
Retail Apartments /Residential
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.
2012 RECA
Compliance Guides for Illinois Homes
FREE Field Compliance Guides http://www.reca-codes.org/
T402.1.1 – 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.
R402.2.1 – 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
EC28-06/07 – Vapor Retarders Dr. Joe Lstiburek, Building Science Corporation
R402.2.3 – Eave Baffle
For air-permeable insulations in vented attics
EXTERIOR
STUD WALL
INTERIOR DRYWALL
CELLULOSE INSULATION
EAVE BAFFLE
(WIND BLOCK)
SOFFIT BAFFLE
(VENTILATION CHUTE)
R402.4.1.1 – Sealing the Building Envelope Align the pressure and thermal boundaries w/ wrapping materials
R402.4.2 – Fireplaces
T402.4.1.1 – Fireplace doors
New wood-burning fireplaces shall have tight-fitting flue dampers and dedicated outdoor combustion air.
Fireplace doors.
Gasket? (see UL127-08)
Advanced Rim/Band
Air-Leakage and Insulation Measures
Spray Foam Application R-Board Sealed-In-Place
Knauf Insulation's EcoSeal Spray Low-odor, low-VOC sealant dries to flexible tough film
IRC R303.4 – Mechanical Ventilation
IRC M1507.3 – Whole House Ventilation
43
44
IRC R303.4 – Mechanical Ventilation
IRC M1507.3 – Whole House Ventilation
Calculating a 62.2 Ventilation Rate
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 ft2 per required CFM = 15 CFM
Add them together:
30 CFM + 15 CFM = 45 CFM continuous
CFMfan = 0.01Afloor + 7.5(Numberbedroom + 1)
+ (alternative compliance supplement)
- (infiltration credit)
Def’n – WHOLE HOUSE
MECHANICAL VENTILATION SYS
DEFINITION
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
48
Integrated [Balanced] System
HRV or ERV
Def’n – WHOLE HOUSE
MECHANICAL VENTILATION SYS
System Types, Geography,
Climate
Restrictions
Hot, Humid Climates
Exhaust-only systems shall not
exceed 7.5 cfm/100 ft2 of CFA.
Very Cold Climates
Mechanical supply systems
exceeding 7.5 cfm/100 ft2 of CFA,
prohibited. 49
R403.6 – Equipment Sizing
ACCA Manual ‘J’, Manual ‘S’
Manual J8th is only used to calculate the heating and cooling loads.
Manual J8th 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.
R403.4.2 – 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:
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.
Significant Changes 2012 Performance-Based Compliance
3b
Darren Meyers, PE, CEM, GBE, BPI-BA
International Energy Conservation Consultants
Education, Building Diagnostics, Energy-Engineering
dmeyers@ieccode.com
Matthew Brown, CGP, HERS Rater
Energy Diagnostics Inc.
Ph 1-800-390-8091
energydiagnostics@hotmail.com
R405 – Simulation Software (Performance Alternative)
Neither ICC nor DOE review or approve specific software.
Section 405 and tables R405.5.2(1) & R405.5.2(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.
R405 – Simulation Software Neither ICC nor DOE review or approve specific software.
For 2009 IECC use REM/Rate™ v12.93 +
For 2012 IECC use REM/Rate™ v12.97 +
Evaluating Performance Software
Submittals
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]
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 1507.3/ASHRAE 62.2 compliance
5) Certificate [Confirmed]
6) HERS Certificate [as necessary]
Permit Review Certificate of Occupancy
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.
Utility Rates are set the
same for the reference home
and the as designed home.
Rates are derived from the
utility serving the address.
62
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.
64
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.
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.
Wall Insulation Grades I-III
Grade I Grade II Grade III
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.
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.
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.
$208.00
Honeywell VisionPro IAQ Thermostat
• For a 2,000 ft2 home
max leakage is 4 cfm / 100 ft2
• (2,000/100) x 4 =
80 cfm max leakage
• 40 cfm < 80 cfm … PASSES !
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without written permission of IECC LLC is prohibited.
© International Energy Conservation Consultants 2012
© Thermal Imaging Services of Central Illinois 2012
Thank you!