ESL 09 IECC Residential - Ed Dryden

2009 IECC TRAINING

Energy

Systems

Laboratory

Residential Provisions

2009 IECC Training - Residential Provisions

© Energy Systems Laboratory, TEES, Texas A&M University System

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2009 IECC TRAINING

Presented by:

Energy Systems Laboratory (ESL)

Texas A&M University

 Assists municipalities and counties determine the relative impacts of local amendments to the code

 Report the status and effect of energy & emissions as impacted by local codes

 Provides energy code training



2

2009 IECC TRAINING

Agenda

1) Introductions

2) Legislative Background Information

3) SECO Rule Making

4) Regional Efforts

5) Chapters 1 to 4, 2009 IECC

6) International Code Compliance

Calculator – IC3

7) Demonstration of IC3



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Introductions

1) Me - Ed Dryden

– 12 Years HVAC Industry Experience

– 25 years experience in municipal code enforcement

– Certified Building Official & other ICC Certifications

– IAS Committee Member for 3 Years

– Member of North Central Texas Council of

Government’s Building & Energy Code Advisory

Board

– Current Building Official, City in North Texas

– Instruct energy code workshops for ESL for 4 years

2) You…..



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American Recovery and Reinvestment Act

General Requirements of ARRA

Target Benchmarks:

2009 IECC for Residential

ASHRAE 90.1-2007 for Commercial

90% compliance:

Model Energy Codes (state-developed) exceeding 2009 IECC or 90.1-

2007

SB16 is Texas’ response

(adopted 09 IECC effective 2012)



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Legislative Background Information

In 2001 (SB 5) the legislature made the finding that an effective building energy code is essential to:

(1) reducing the air pollutant emissions that are affecting the health of residents of this state;

(2) moderating future peak electric power demand;

(3) assuring the reliability of the electrical grid; and

(4) controlling energy costs for residents and businesses in this state.



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To accomplish these findings:

1. The energy efficiency chapter of the IRC, (2000/2001 supplement) was adopted as the energy code in this state for single-family residential construction, and

2. The IECC (2000/2001 supplement) was adopted as the energy code in this state for all other residential, commercial, and industrial construction.



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A City shall establish procedures:

(1) for administration and enforcement; and

(2) to ensure that code-certified inspectors shall perform energy inspections

A City may establish procedures to adopt local amendments to the energy codes, but

Local amendments may not result in less stringent energy efficiency requirements in nonattainment areas and in affected counties, and

Local amendments must comply with the National Appliance

Energy Conservation Act



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Texas’ Non-attainment and Near Non-attainment Areas



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If the SECO determines, based on written recommendations from the ESL, that the energy efficiency provisions of the latest editions of the

IRC or the IECC for residential or commercial energy efficiency and air quality are equivalent to or more stringent than the base codes ,

SECO may by rule adopt and substitute in the energy code the equivalent or more stringent editions



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Effective January 1, 2012 , the energy efficiency provisions of the

International Residential Code as they existed on May 1, 2009, are adopted as the energy code in this state for single-family residential construction

Effective April 1, 2011 , the International Energy Conservation

Code as it existed on May 1, 2009, is adopted as the energy code for use in this state for all residential, commercial, and industrial construction that is not single-family residential

NOTE: Single family is defined as 1& 2 family detached dwellings and townhomes in the statute



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ESL, at the request of a City, shall determine the relative impact of proposed local amendments to an energy code, including whether proposed amendments are substantially equal to or less stringent than the unamended code.

For the purpose of establishing uniform requirements throughout a region, and on request of a council of governments, a county, or a municipality, the laboratory may recommend a climatically appropriate modification or a climate zone designation for a county or group of counties that is different from the climate zone designation in the unamended code.



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North Central Texas Council of Governments has reviewed and provided “recommended” amendments to the 2009 IECC and the energy provisions of the 2009 IRC

“Recommended” amendments have been reviewed and approved by

ESL as not less stringent

Available for viewing and download at: http://www.nctcog.org/envir/SEEDevEx/codes/2009amendments.asp



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Chapter 1 Administrative Provisions

101.2 Scope.

This code applies to residential and commercial buildings .

101.3 Intent.

This code shall regulate the design and construction of buildings for the effective use of energy. This code is intended to provide flexibility to permit the use of innovative approaches and techniques to achieve the effective use of energy. This code is not intended to abridge safety, health or environmental requirements contained in other applicable codes or ordinances.



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101.4 Applicability.

Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern.

Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall govern.

101.4.1 Existing buildings.

Except as specified in this chapter, this code shall not be used to require the removal, alteration or abandonment of, nor prevent the continued use and maintenance of, an existing building or building system lawfully in existence at the time of adoption of this code.



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NCTCOG Recommended Amendment

101.4.2 Historic Buildings. Any building or structure that is listed in the

State or National Register of Historic Places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a National Register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the National or State Registers of

Historic Places either individually or as a contributing building to a historic district by the State Historic Preservation Officer of the Keeper of the

National Register of Historic Places, are exempt from shall comply with all of the provisions of this code.

Exception: Whenever a provision or provisions shall invalidate or jeopardize the historical designation or listing, that provision or provisions



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101.4.3 Additions, alterations, renovations or repairs.

Additions, alterations, renovations or repairs to an existing building, building system or portion thereof shall conform to the provisions of this code as they relate to new construction without requiring the unaltered portion(s) of the existing building or building system to comply with this code.

Additions, alterations, renovations or repairs shall not create an unsafe or hazardous condition or overload existing building systems.

An addition shall be deemed to comply with this code if the addition alone complies or if the existing building and addition comply with this code as a single building.



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101.4.3 Additions, alterations, renovations and repair

4 New Exceptions in 09 IECC

5. Reroofing for roofs where neither the sheathing nor the insulation is exposed.

Roofs without insulation in the cavity and where the sheathing or insulation is exposed during reroofing shall be insulated either above or below the sheathing.

6. Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided, however, that an existing vestibule that separates a conditioned space from the exterior shall not be removed,

7. Alterations that replace less than 50 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power.

8. Alterations that replace only the bulb and ballast within the existing luminaires in a space provided that the alteration does not increase the installed interior lighting power.



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101.4.4 Change in occupancy or use.

Spaces undergoing a change in occupancy that would result in an increase in demand for either fossil fuel or electrical energy shall comply with this code.

Where the use in a space changes from one use in Table 505.5.2 to another use in

Table 505.5.2, the installed lighting wattage shall comply with Section 505.5.

101.4.5 Change in space conditioning.

Any nonconditioned space that is altered to become conditioned space shall be required to be brought into full compliance with this code.

101.4.6 Mixed occupancy.

Where a building includes both residential and commercial occupancies, each occupancy shall be separately considered and meet the applicable provisions of

Chapter 4 for residential and Chapter 5 for commercial .



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101.5 Compliance.

Residential buildings shall meet the provisions of Chapter 4. Commercial buildings shall meet the provisions of Chapter 5.

101.5.1 Compliance materials.

The code official shall be permitted to approve specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code.

101.5.2 Low energy buildings.

The following buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this code shall be exempt from the building thermal envelope provisions of this code:

1.

Those with a peak design rate of energy usage less than 3.4 Btu/h • ft2

(10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space conditioning purposes.

2.

Those that do not contain conditioned space .



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NCTCOG Recommended Amendment

103.1.1 Alternative compliance . A building certified by a national, state, or local accredited energy efficiency program and determined by the

Energy Systems Laboratory to be in compliance with the energy efficiency requirements of this section may, at the option of the Code

Official, be considered in compliance. The United States Environmental

Protection Agency's Energy Star Program certification of energy code equivalency shall be considered in compliance.

Reflects the mandate of Texas HB 1365, 78 th Legislature



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Chapter 2

Definitions

Air Barrier - Material(s) assembled and joined together to provide a barrier to air leakage through the building envelope. An air barrier may be a single material or a combination of materials.

Alteration Any construction or renovation to an existing structure other than repair or addition that requires a permit. Also, a change in a mechanical system that involves an extension, addition or change to the arrangement, type or purpose of the original installation that requires a permit.

High-Efficacy Lamps. Compact fluorescent lamps, T-8 or smaller diameter linear fluorescent lamps, or lamps with a minimum efficacy of:

1.

60 lumens per watt for lamps over 40 watts,

2. 50 lumens per watt for lamps over 15 watts to 40 watts, and

3. 40 lumens per watt for lamps 15 watts or less.



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Chapter 2

Definitions

Residential Building For this code, includes R-3 buildings, as well as

R-2 and R-4 buildings three stories or less in height above grade.

Roof Assembly - A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof covering, underlayment, roof deck, insulation, vapor retarder and interior finish.

Sunroom - A one-story structure attached to a dwelling with a glazing area in excess of 40 percent of the gross area of the structure's exterior walls and roof.

Thermal Isolation - Physical and space conditioning separation from conditioned space(s) . The conditioned space (s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment.



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Chapter 3

Climate Zones



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Chapter 3

Climate Zones

302.1 Interior design conditions. The interior design temperatures used for heating & cooling load calculations shall be a maximum of 72 °F for heating and minimum of 75 °F for cooling.

303.1 Identification. Materials, systems and equipment shall be identified…

303.1.1 Building thermal envelope insulation.

Insulation marked with an R -value ; or,

The insulation installers shall provide a certification listing the type, manufacturer and R -value of insulation installed in each element of the building thermal envelope .



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Chapter 3

Climate Zones

303.1.1 Building thermal envelope insulation.

For blown or sprayed insulation (fiberglass and cellulose):

 the initial installed thickness,

 settled thickness,

 settled R -value,

 installed density,

 coverage area, and

 number of bags

For sprayed polyurethane foam (SPF) insulation:

 the installed thickness of the areas covered, and

 R- value of installed thickness shall be listed on the certification.

The insulation installer shall sign, date and post the certification in a conspicuous location on the job site.



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Chapter 3

Climate Zones

303.1.1.1 Blown or sprayed roof/ceiling insulation.

The thickness of blown-in or sprayed roof/ceiling insulation (fiberglass or cellulose) shall be written in inches on markers that are installed at least one for every 300 square feet throughout the attic space. The markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness with numbers a minimum of 1 inch in height.

Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R- value shall be listed on certification provided by the insulation installer.

303.1.2 Insulation mark installation.

Insulating materials shall be installed such that the manufacturer's R value mark is readily observable upon inspection.



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Chapter 3

Climate Zones

303.1.3 Fenestration product rating.

U -factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer.

Products lacking such a labeled U -factor shall be assigned a default U factor from Table 303.1.3(1) or 303.1.3(2).

The solar heat gain coefficient (SHGC) of glazed fenestration products

(windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer.

Products lacking such a labeled SHGC shall be assigned a default SHGC from Table 303.1.3(3).



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Chapter 3

Climate Zones

(insert table)



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Chapter 3

Climate Zones

TABLE 303.1.3(3)

DEFAULT GLAZED FENESTRATION SHGC

(insert table)



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Chapter 3

Climate Zones

(insert table)



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Chapter 3

Climate Zones

NEW in 2009 IECC

303.1.4 Insulation product rating. The thermal resistance (Rvalue) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R -value rule (CFR Title

16, Part 460, May 31, 2005) in units of h × ft2 × °F/Btu at a mean temperature of 75 °F (24°C).



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Chapter 4

Residential Provisions

CHAPTER 4

RESIDENTIAL ENERGY EFFICIENCY

SECTION 401 – GENERAL

SECTION 402 - BUILDING THERMAL ENVELOPE

SECTION 403 – SYSTEMS

SECTION 404 - ELECTRICAL POWER AND LIGHTING SYSTEMS

SECTION 405 - SIMULATED PERFORMANCE ALTERNATIVE (Performance)



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Chapter 4

Compliance Options

401.1 Scope This chapter applies to residential buildings.

401.2 Compliance Must comply with either prescriptive provisions:

 402.1 thru 402.3 (Insulation & Fenestration),

 403.2.1 (Duct Insulation) , and

 404 (Lighting)

Or :

 405 – Performance provisions

AND……..

8 Mandatory Provisions



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Chapter 4


8 Mandatory Provisions:

 401 – Compliance statement

 402.4 – Air leakage Requirements

 402.5 – Max fenestration U -factor & SHGC (Area weighted averages)

 403.1 – Mechanical Systems Controls

 403.2.2 –HVAC Duct Sealing

 402.2.3 – Building Cavities not used as supply ducts

 403.3 thru 403.9

– Piping insulation, ventilation, complex systems, snow melt, and swimming pools



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Chapter 4

401.3 Certificate

NEW in 2009 IECC

401.3 Certificate A permanent certificate

 Shall be posted on or in the electrical distribution panel

 Shall be completed by the builder or registered design professional

 Shall list the predominant R -values of insulation installed in or on ceiling/roof, walls, foundation (slab, basement wall, crawlspace wall and/or floor) and ducts outside conditioned spaces; U -factors for fenestration and the solar heat gain coefficient (SHGC) of fenestration

 Shall list the types and efficiencies of heating, cooling and service water heating equipment

 ID "gas-fired unvented room heater," "electric furnace" or "baseboard electric heater," as appropriate

 An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heaters.



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Chapter 4


Prescriptive U-Factor and

“UA” Alternatives

Component values from:

Table 402.1.1

Plus Mandatory

Provisions

U-factor

402.1.3

or

Total Building UA

402.1.4

Simulated

Performance

(software)

Simulated

Performance

Alternative

405



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Chapter 4




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Chapter 4

402.2 Specific insulation requirements (Prescriptive).

402.2.1 Ceilings with attic spaces - Where R38 is required, may be reduced to R30 when raised heel trusses are used. Same trade off if R49 is required - R38 allowed when raised heel trusses are used.

402.2.2 Ceilings without attic spaces Where insulation levels above R-

30 are required and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-30 but only limited to

500 square feet (46 m2) or 20 percent of the total insulated ceiling area, whichever is less.

Neither of these applicable to Ufactor alternative approach



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Chapter 4


402.1.2 R- value computation. Insulation material used in layers, such as framing cavity insulation and insulating sheathing, shall be summed to compute the component R -value. The manufacturer's settled R -value shall be used for blown insulation. Computed R -values shall not include an R -value for other building materials or air films.

402.1.3 U -factor alternative. An assembly with a U -factor equal to or less than that specified in Table 402.1.3 shall be permitted as an alternative to the R -value in Table 402.1.1.

U -factor alternative shall include the thermal bridging effects of framing materials and the SHGC requirements shall be met in addition to UA compliance.



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Chapter 4




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Chapter 4 - Residential Provisions

402.1.3 - U-Factors Alternative

An assembly (roof, wall, floor) with a U-factor equal to or less than value specified in Table

403.1.3 is permitted as an alternative to the Rvalue specified in Table 402.1.1 (prescriptive table)



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Chapter 4 - Residential Provisions

Calculating Assembly U-Factors

An area-weighted average U-factor is calculated for the wall system that takes into account the effects of framing and systems

 An R-value must be determined for each different material in the assembly

 The R-values are then totaled to determine the total

R-value through each thermal path of the assembly

 The total R-values are then converted to U-factors by taking the reciprocal of the R-value



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Sample Calculation - Walls

U ow

=

( U wl x A wl

) + ( U w2 x A w2

) + …

A w1

+ A w2

+ …

Where

• U wl

= U -factor of opaque wall number 1

• A wl

= Area of opaque wall number 1

• U w2

= U -factor of opaque wall number 2

• A w2

= Area of opaque wall number 2



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402.1.4 Total UA Alternative

 The building envelope design is permitted to deviate from R-values or U-factors in Tables 402.1.1 or 402.1.3, respectively, provided the total thermal transmittance

(UA) is the same or less as the very same building envelope geometry designed to code

 The calculation shall be done using a method consistent with the ASHRAE Handbook of

Fundamentals and shall include the thermal bridging effects of framing materials

 SHGC requirements shall be met



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402.2.3 Access Hatches and Doors

Specific insulation requirements (Prescriptive)

• Access doors from conditioned to unconditioned spaces shall be:

– Weather-stripped

– Insulated to the equivalent R-value on the surrounding surfaces

•A wood framed baffle or retainer is required to be provided when loose fill insulation is installed



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402.2.4 Mass Walls


• For residential purposes above-grade walls are:

– Concrete block

– Concrete

– Insulated concrete form (ICF)

– Masonry cavity

– Brick (other than brick veneer)

– Earth

• Adobe

• Compressed earth block

• Rammed earth

– Solid timber/logs



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402.2.5 Steel Framing


• Steel framing ceilings, walls and floors shall meet the insulation requirements of

Table 402.2.5 or the

U-factor requirements in

Table 402.1.3

Dietrich Metal Framing



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402.2.6 Floors


Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking



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402.2.7 Basement Walls


 Defined as walls greater than or equal to 50 percent below grade

 Insulate from the top of the basement wall down 10 feet below grade or to the basement floor, whichever is less



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402.2.8 Slab-on-grade Floors




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402.2.9 Crawl Space Walls


Criteria:

 Must be insulated to the R-value specified in the energy code

 May not have ventilation openings that communicate directly with outside air

 Must be mechanically ventilated or supplied with conditioned air

 Exposed earth floors must be covered with an approved vapor retarder material, which extends up the stem wall and is sealed and taped to the wall

Noel’s Green Blog



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402.2.11 & 402.3.5 Thermally Isolated Sunroom

Specific insulation & fenestration (Prescriptive)

Requirements:

 Separate zones for heating and cooling or conditioned by separate equipment

 Must maintain thermal isolation

Thermal Isolation – Physical and space conditioning separation from conditioned spaces

 Minimum wall R-value shall be R-13 (Section

402.2.11)

 Minimum ceiling R-value shall be R-19 in zones

1-4 and R-24 in zones 5-8 (Section 402.2.11)

 The glass used must have a maximum Ufactor of

0.50 inches and skylights Ufactor of 0.75 in climate zones 4-8 (Section 402.3.5)



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402.2.11 & 402.3.5 Thermally Isolated Sunroom

Specific insulation & fenestration (Prescriptive)



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402.3 Fenestration. (Prescriptive)

U-factor and SHGC

402.3.1 U-factor

Area weighted average of fenestration products may be used to satisfy the Ufactor requirements

402.3.1 U-factor

Area weighted average of fenestration products with more than 50 percent glazing may be used to satisfy the SHCG requirements



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Glazed fenestration & opaque door exemption

402.3 Fenestration. (Prescriptive)

Up to 15 ft 2 of glazed fenestration per dwelling unit can be exempted from U -factor and SHGC requirements

One side-hinged opaque door assembly up to 24 square feet shall be exempt from U-factor and SHCG requirements

402.3.6 Replacement fenestration. When an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U -factor and SHGC in Table 402.1.1.



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Physical Inspection

402.4 Air leakage (Mandatory)

402.4.1 – Building thermal envelope

 Durably sealed to limit infiltration

402.4.2 – Air Sealing and Insulation

 Building envelope air tightness and insulation shall be demonstrated in one of two ways

 402.4.2.1 Testing option

 402.4.2.2 Visual inspection option

Follows Table 402.4.2 and where required by the code official, an approved party independent from the installer of the insulation shall inspect the air barrier and insulation



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Testing Option


• Acceptable when tested air leakage is less than seven air changes per hour (ACH) at a pressure of

33.5 psf (50 Pa)

• There are seven requirements

– 1. Exterior windows and doors, fireplaces and stove doors closed, but not sealed

– 2. Dampers shall be closed but not sealed

– 3. Interior doors open

– 4. Exterior openings for continuous ventilation systems and heat recovery ventilators closed and sealed

– 5. Heating and cooling systems turned off

– 6. HVAC shall not be sealed

– 7. Supply and return registered shall not be sealed



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Blower Door Test




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402.4.3 Fireplaces


New wood-burning fireplaces shall have gasketed doors and outdoor combustion air



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Recessed Lighting


402.4.5 Recessed lighting.

Recessed luminaires shall be sealed to limit air leakage between conditioned and unconditioned spaces. All recessed luminaires shall be IC-rated and labeled as meeting ASTM E 283 when tested at 1.57 psf (75 Pa) pressure differential with no more than 2.0 cfm

(0.944 L/s) of air movement from the conditioned space to the ceiling cavity. All recessed luminaires shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling covering.



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402.5 Maximum U-factor and SHCG

Area-weighted average max U-factor using tradeoffs from 402.1.4 (Total UA) or 405 shall be

Zones 4 and 5 is 0.48

Zones 6 – 8 is 0.40

Skylights

Zones 4 – 8 is 0.75

Area-weighted average max SHGC from

Section 405 (Performance)

Zones 1 – 3 is 0.50



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SECTION 403, SYSTEMS

Controls

403.1 Controls (Mandatory) At least one thermostat shall be provided for each separate heating and cooling system.

403.1.1 Programmable thermostat One thermostat per dwelling unit shall be capable of controlling the heating and cooling system

 Daily schedule to maintain different temperature set points at different times of the day.

 Set back or temporarily operate the system to maintain zone temperatures down to 55 °F or up to 85°F

 The thermostat shall initially be programmed with a heating temperature set point no higher than 70 °F (21°C) and a cooling temperature set point no lower than 78 °F (26°C).

403.1.2 Heat pump supplementary heat (Mandatory) Heat pumps having supplementary electric-resistance heat shall have controls that, except during defrost, prevent supplemental heat operation when the heat pump compressor can meet the heating load.



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403.2 Ducts

Duct Insulation – New 09 Requirement

• 403.2.1 – Insulation

– Supply ducts in attics shall be R-8 min

– All other ducts shall be R-6 min

– Exception

• Ducts located completely inside the building thermal envelope



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403.2 Ducts

Duct Sealing – New 09 Requirement

403.2.2 – Sealing (Mandatory)

 All ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed in accordance with Section

M1601.4.1 IRC

 Duct tightness shall be verified by testing

Post-construction or rough-in

The test is not required where the air handler and entire duct system are located within conditioned space.



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403.2.3 Building cavities

403.3 Mechanical system piping insulation

403.2.3 Building cavities (Mandatory).

Building framing cavities shall not be used as supply ducts.

403.3 Mechanical system piping insulation (Mandatory).

Mechanical system piping capable of carrying fluids above

105 ° F (41 ° C) or below 55 ° F (13 ° C) shall be insulated to a minimum of R-3. (Suction lines…)



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403.4 Circulating Hot Water

• Insulation

– All hot water piping shall be R-2 min

• Controls

– Automatic controls OR

– Readily accessible manual switch



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Sizing and Multiple Dwelling Units

• 403.6 Equipment Sizing

– Heating and cooling equipment shall be sized in accordance with IRC Section M1401.3

• 403.7 Systems serving Multiple Dwelling

Units

– All systems serving multiple dwelling units shall comply with Sections 503 and 504 in lieu of Section 403



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403.8 Snow Melt System Controls

•

Snow and ice-melting equipment controls

–

Automatic controls capable of shutting down the system when

• The pavement temperature is above 50 o F and no precipitation is falling AND

• An automatic or manual control that will allow shutoff when the outdoor temperature is above 40 o F

Heated Driveway Systems



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Section 403.9 Pools

Energy conservation requirements are required for pools, including time switches to turn pumps and heaters off and vapor retardant covers.



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403.9.2 Time Switches

• Time switches to automatically turn off and on heaters and pumps according to a preset schedule shall be installed on swimming pool heaters and pumps.

• Exceptions

– Where public health standards require 24 hour operation

– Where the pumps are required to operate solar-waste-heat recovery heating systems



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403.9.3 Pool Cover

• Vapor retardant on or at the water surface

– Required on all heated pools

– Heated to 90 o

F or more

• Require a minimum R-12

– Exception

• 60% energy for heating from site-recovered or solar energy source



72

404.1 Lighting Equipment

A minimum of fifty percent of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps.



73

Break

15 minutes



74

405 Simulated Performance Alternative

An energy estimation tool is used to compare the energy use of the proposed design with that of the standard design building, may meet or exceed the minimum code requirements.



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405.1 Scope and

405.2 Mandatory Requirements

Scope – analysis include only

Heating,

Cooling, and

Service water heating

Mandatory requirements

All 8 provisions of 401.2, and

All ducts not inside building envelope insulated to minimum R-6



76

405.4 Documentation

405.4.1 – Compliance Software Tools

V erifies that methods & accuracy conforms

405.4.2 – Compliance Report

Documents compliance and includes:

Address, inspection checklist, name of person completing report, and name & version of software

405.4.3 – Additional Documentation

Building component characteristics, certification signed by builder, and actual values used in calcs



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Table 405.5.2(1)

• Table 405.5.2(1) - Specifications for the standard reference and proposed designs

– Building component

– Standard reference design

– Proposed design

– Footnotes

– Table 405.5.2(2) Default Distribution

System Efficiencies for Proposed Designs



78



79



80

Examples of Performance Tools

Home Energy Rating Systems (HERS) – REMrate

DOE 2 – Department of Energy

Energy Gauge

International Code Compliance Calculator



81

IC3


 Developed by ESL w/ cooperative efforts of TCEQ and

USEPA

 Simple straight forward approach, User friendly – Web

Based

 Will generate a “Certificate” that demonstrates compliance

 Calculates “actual” emissions

 Captures above code credits for SIP

 Free! Free! Free! Free! Free!



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User Requirements

Need general construction knowledge

Need IECC/IRC code knowledge

Need to be familiar with Windows based PC approaches & using Internet

Need project specific information:

Location: county & street address, orientation

Floor/wall/ceiling areas/heights/dimensions/shading

Window areas, U values & SHGC values

Insulation values

Mechanical efficiencies & hot water heating efficiencies



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• Web browser interface inputs data to 2 main frame based software packages

• One to DOE 2- to calculate code compliance

• The other to EGRID, electric grid calculation tool

• Knows what % of electricity comes from different power plants

• Knows the fuel makeup of the power plants

• Calculates emissions reductions as compared to code complaint house



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Construction Details

• Perform a take off on the house

• Information Required:

• General information: address, county, builder and any notes unique to project

• Wall(s), floor(s), ceiling(s) area(s) & insulation values (area weighted averages)

• House orientation

• Exterior wall and roof construction materials

• Number of sleeping rooms

• Roof overhang distances (window shading)

• Foundation perimeter of thermal envelope

• Window areas and U-factors and SHGC values



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Construction Details (Cont’d)

• Information Required (continued):

• HVAC size and efficiency rating

• Duct insulation (trade offs allowed from R8 to R6)

• Location of ducts and equipment (attic or in conditions space)

• Duct blaster testing results, estimate; door blower testing option

• Water heater efficiency

• Radiant barrier used

• Fuel source (electricity or natural gas)



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Q & A

Free download of 2009 IECC available at: http://www.iccsafe.org/store/pages/doeregistration.aspx



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ESL 09 IECC Residential - Ed Dryden

2009 IECC TRAINING

2009 IECC TRAINING

402.5 Maximum U-factor and SHCG

• 403.2.1 – Insulation

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ESL 09 IECC Residential - Ed Dryden

2009 IECC TRAINING

2009 IECC TRAINING

402.5 Maximum U-factor and SHCG

• 403.2.1 – Insulation

Break

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http://ic3.tamu.edu

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