The Latest from the The Latest from the Keep Aluminum WindowsKeep Aluminum Windows

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Thomas D. Culp, Ph.D.Thomas D. Culp, Ph.D.Aluminum Extruders CouncilAluminum Extruders Council

TopicsTopics•• Introduction to KAWIntroduction to KAW•• Benefits of Aluminum FenestrationBenefits of Aluminum Fenestration•• Energy CodesEnergy Codes

–– Code Organizations & BasicsCode Organizations & Basics–– Problems with the CodesProblems with the Codes–– KAW ActionsKAW Actions

•• Other IssuesOther Issues

The The Keep Aluminum Keep Aluminum WindowsWindows CampaignCampaign

•• Formed by the Aluminum Extruders Council (AEC) Formed by the Aluminum Extruders Council (AEC) in 2002 to serve the interests of the aluminum in 2002 to serve the interests of the aluminum fenestration industry.fenestration industry.

•• Advocate for aluminum in all aspects of the building Advocate for aluminum in all aspects of the building and construction industry: residential and commercial. and construction industry: residential and commercial.

•• KAW promotes advancements in overall energy KAW promotes advancements in overall energy performance in conjunction with other key performance in conjunction with other key requirements, such as structural performance and requirements, such as structural performance and durability. durability.

•• Very active with Very active with energy codes (IRC, IECC, ASHRAE) energy codes (IRC, IECC, ASHRAE) and fenestration rating programs (Energy Star, NFRC, and fenestration rating programs (Energy Star, NFRC, AAMA). AAMA).

KAW ParticipationKAW Participation•• Recently expanded to include new Manufacturer Recently expanded to include new Manufacturer

and Technical Advisory Subcommittees.and Technical Advisory Subcommittees.

•• Participation open to any company involved with Participation open to any company involved with or supportive of aluminum fenestration. or supportive of aluminum fenestration. –– Previously, KAW participation was limited to AEC Previously, KAW participation was limited to AEC

extruder or supplier members. extruder or supplier members.

•• Increased opportunity to involve manufacturers Increased opportunity to involve manufacturers and others whom our advocacy is directly and others whom our advocacy is directly benefiting.benefiting.

Previous KAW VictoriesPrevious KAW Victories•• Energy StarEnergy Star®® Windows (2002 Windows (2002 –– 2005)2005)

–– Convinced DOE to adopt performanceConvinced DOE to adopt performance--based criteria in based criteria in the south and south central zones.the south and south central zones.

•• IECC Commercial Energy Code (2004 IECC Commercial Energy Code (2004 –– 2006)2006)–– Passed key code proposal for 2006 IECC with revised Passed key code proposal for 2006 IECC with revised

UU--factor requirements that accommodate structural factor requirements that accommodate structural products while promoting energy efficiency.products while promoting energy efficiency.

•• ASHRAE 90.1 (2005 ASHRAE 90.1 (2005 –– 2007)2007)–– Convinced ASHRAE to adopt revised fenestration Convinced ASHRAE to adopt revised fenestration

criteria in line with the corrected IECC requirements, criteria in line with the corrected IECC requirements, accommodating structural products for commercial accommodating structural products for commercial buildings.buildings.

Benefits of Aluminum FenestrationBenefits of Aluminum Fenestration•• Superior structural performanceSuperior structural performance

–– Dominant material in commercial architectural windows, storefronDominant material in commercial architectural windows, storefront, t, curtainwall, high wind load applicationscurtainwall, high wind load applications

•• Superior durabilitySuperior durability–– Longer design lifetimeLonger design lifetime–– Long term energy performance Long term energy performance

•• Superior manufacturingSuperior manufacturing–– Design flexibilityDesign flexibility–– High production rates and yieldsHigh production rates and yields–– Cost effectiveCost effective

•• Green, safe materialGreen, safe material–– fully recyclablefully recyclable–– low energy to reprocesslow energy to reprocess–– superior fire and smoke performancesuperior fire and smoke performance–– energy efficient with advanced thermalenergy efficient with advanced thermal--barrier framesbarrier frames

Energy CodesEnergy Codes

•• Code BasicsCode Basics•• Problems with the CodesProblems with the Codes•• KAW ActionsKAW Actions

Who makes the code?Who makes the code?U.S. Code Organizations:U.S. Code Organizations:•• International Code Council (ICC)International Code Council (ICC)•• National Fire Protection Association (NFPA)National Fire Protection Association (NFPA)•• American Society of Heating, Refrigeration, and American Society of Heating, Refrigeration, and

AirAir--conditioning Engineers (ASHRAE)conditioning Engineers (ASHRAE)–– Technically a standards organization, but often used as Technically a standards organization, but often used as

commercial energy code.commercial energy code.

These are These are privateprivate organizations, not part of federal organizations, not part of federal government.government.

National vs. Regional CodesNational vs. Regional Codes•• These organizations develop These organizations develop national model codesnational model codes..•• Actual legal authority is at the local level.Actual legal authority is at the local level.

–– States, Counties, CitiesStates, Counties, Cities

•• The national model code has no power until adopted by the The national model code has no power until adopted by the local jurisdiction.local jurisdiction.

•• Federal government has no direct authority, but Federal government has no direct authority, but ……–– Can create and influence proposed code changes.Can create and influence proposed code changes.–– Can force states to evaluate certain codes. Can force states to evaluate certain codes. –– Sets code requirements for government buildings.Sets code requirements for government buildings.

•• As a result, adoption and enforcement of codes vary As a result, adoption and enforcement of codes vary across the country, but the model code is still the major across the country, but the model code is still the major driving force.driving force.

U.S. Residential Energy CodesU.S. Residential Energy CodesDominated by two ICC codes:Dominated by two ICC codes:•• IRCIRC -- International Residential CodeInternational Residential Code•• IECCIECC -- International Energy Conservation CodeInternational Energy Conservation Code•• Approximately 70% of Approximately 70% of

states have adopted states have adopted IRC / IECC or equiv.IRC / IECC or equiv.

•• Several western states Several western states are are ““home rulehome rule”” and and leave code adoption to leave code adoption to individual town or individual town or county.county.

•• ASHRAE 90.2 also ASHRAE 90.2 also pushed by NFPA, pushed by NFPA, but rarely used.but rarely used.

U.S. Commercial Energy CodesU.S. Commercial Energy CodesDominated by two codes / standards:Dominated by two codes / standards:•• ASHRAE 90.1ASHRAE 90.1 -- Energy Standard for Buildings ExceptEnergy Standard for Buildings Except

LowLow--Rise Residential BuildingsRise Residential Buildings•• IECC IECC -- International Energy Conservation CodeInternational Energy Conservation Code

•• ASHRAE 90.1 is ASHRAE 90.1 is dominant, but dominant, but IECC is growing. IECC is growing.

•• IECC actually gives IECC actually gives builder the option to builder the option to use either ASHRAE use either ASHRAE 90.1 or simplified 90.1 or simplified prescriptive prescriptive requirements.requirements.

•• Some variations at Some variations at local level.local level.

Prescriptive vs. Performance RequirementsPrescriptive vs. Performance Requirements•• Prescriptive requirementsPrescriptive requirements

–– Specify minimum criteria for each individual property or Specify minimum criteria for each individual property or component in the design. component in the design.

–– Simple, but discriminates against products which do not Simple, but discriminates against products which do not exactly fit the design (regardless of performance).exactly fit the design (regardless of performance).

–– These often drive product design because of simplicity. These often drive product design because of simplicity.

•• PerformancePerformance--based requirementsbased requirements–– Specify minimum level for overall performance.Specify minimum level for overall performance.–– Only achieving the performance level matters, not how you Only achieving the performance level matters, not how you

get there.get there.–– More complex to calculate overall performance, but does not More complex to calculate overall performance, but does not

discriminate against individual components or materials.discriminate against individual components or materials.–– In energy codes, use In energy codes, use ““UAUA”” tradetrade--off to show equivalence of off to show equivalence of

overall envelope, or whole building calculation of annual overall envelope, or whole building calculation of annual energy cost.energy cost.

2006 IRC / IECC Prescriptive Requirements 2006 IRC / IECC Prescriptive Requirements Residential FenestrationResidential Fenestration

1.201.20

0.750.75

0.650.65

0.650.65

0.400.40

0.350.35

U U verticalvertical

0.750.75

0.750.75

0.650.65

0.650.65

0.600.60

0.600.60

U U skylightskylight

NRNR4 except 4 except MarineMarine

NRNR8, 7, 6, 5, 8, 7, 6, 5, 4 Marine 4 Marine

11

22

3 except 3 except MarineMarine

3 Marine3 Marine

ZoneZone

0.400.40

0.400.40

0.400.40

NRNR

SHGCSHGC

•• Thermally isolated sunroom: Thermally isolated sunroom: –– Zones 4Zones 4--8: max U = 0.50 for vertical, 0.75 for skylight 8: max U = 0.50 for vertical, 0.75 for skylight

•• Unconditioned or lowUnconditioned or low--energy (< 1 W/ftenergy (< 1 W/ft22) sunroom:) sunroom:–– No requirementsNo requirements

Problems with the Energy CodesProblems with the Energy Codes

1.1. Focus is still on just UFocus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

1. Focus is still on just U1. Focus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

•• Prescriptive U and SHGC requirements are simple, but have Prescriptive U and SHGC requirements are simple, but have no flexibility.no flexibility.

•• It is inaccurate to look at U, SHGC, and AL separately. It is inaccurate to look at U, SHGC, and AL separately. Total energy performanceTotal energy performance is determined by the is determined by the combinationcombinationof these factors.of these factors.

•• Prescriptive requirements do not allow for tradePrescriptive requirements do not allow for trade--offs offs between U, SHGC, AL even if have equivalent energy between U, SHGC, AL even if have equivalent energy performance.performance.

•• Products may greatly surpass one requirement (SHGC Products may greatly surpass one requirement (SHGC or AL) and only barely miss the other (U), but prescriptive or AL) and only barely miss the other (U), but prescriptive requirements give no credit.requirements give no credit.

•• Discriminate against nonDiscriminate against non--standard products.standard products.•• Having alternative performance methods for building is Having alternative performance methods for building is

not enough.not enough.–– Even if building performance methods are allowed, prescriptive Even if building performance methods are allowed, prescriptive

requirements drive product design for individual components.requirements drive product design for individual components.–– Use of performance methods are often too expensive for smaller Use of performance methods are often too expensive for smaller

commercial buildings or individual homes.commercial buildings or individual homes.–– Some code officials donSome code officials don’’t understand performance methods.t understand performance methods.

•• Need to support performanceNeed to support performance--based tradebased trade--offs in the offs in the codes and Energy Star. codes and Energy Star.

1. Focus is still on just U1. Focus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

1. Focus is still on just U1. Focus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

KAW Actions: KAW Actions: Energy StarEnergy Star®® Windows Windows •• Convinced DOE to adopt equivalent energy performanceConvinced DOE to adopt equivalent energy performance--

based criteria in the south and south central zones. based criteria in the south and south central zones. •• Allow higher U if compensate with lower SHGC.Allow higher U if compensate with lower SHGC.

–– More flexibility for nonMore flexibility for non--thermally broken aluminum products in thermally broken aluminum products in Southern zone.Southern zone.

–– Although still difficult, more flexibility for thermally broken Although still difficult, more flexibility for thermally broken aluminum aluminum frames in South Central zone.frames in South Central zone.

•• Allow more aluminum residential windows and doors to Allow more aluminum residential windows and doors to qualify for Energy Star labeling.qualify for Energy Star labeling.

•• Important precedent that all future changes must also be Important precedent that all future changes must also be performanceperformance--based. based.

1. Focus is still on just U1. Focus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

KAW Actions: KAW Actions: Energy StarEnergy Star®® Windows Windows • Equivalent Energy Performance Amendment

for Windows and Doors:

1. Focus is still on just U1. Focus is still on just U--factor, factor, not overall energy performance.not overall energy performance.

KAW Actions: KAW Actions: Northern tradeNorthern trade--off code proposaloff code proposal•• Proposal to IECC / IRC for residential fenestration in Proposal to IECC / IRC for residential fenestration in northernnorthern

cold climates. cold climates. •• Allow higher UAllow higher U--factor if balance with higher SHGC.factor if balance with higher SHGC.•• Equivalent energy performance as current prescriptive criteria, Equivalent energy performance as current prescriptive criteria,

based on LBNL report for Energy Star.based on LBNL report for Energy Star.•• Approved by IRC at preliminary hearings. Disapproved by IECC. Approved by IRC at preliminary hearings. Disapproved by IECC.

Final decision at final hearings in May.Final decision at final hearings in May.ALTERNATIVE FENESTRATION U-FACTOR AND SHGC REQUIREMENTS IN ZONES 6 THROUGH 8

GLAZED FENESTRATION SHGC

MAXIMUM FENESTRATION U-FACTOR

≤ 0.40 0.35 0.40 < SHGC ≤ 0.43 0.36 0.43 < SHGC ≤ 0.45 0.37 0.45 < SHGC ≤ 0.48 0.38 0.48 < SHGC ≤ 0.51 0.39 0.51 < SHGC ≤ 0.54 0.40

Problems with the Energy CodesProblems with the Energy Codes

2.2. TradeTrade--off Limits or off Limits or ““Hard CapsHard Caps””create artificial constraints.create artificial constraints.

2. Trade2. Trade--off Limits or off Limits or ““Hard CapsHard Caps””•• Hard caps set absolute limits on window Hard caps set absolute limits on window

properties which may never be exceeded, properties which may never be exceeded, even when tradeeven when trade--off methods are used to show off methods are used to show the building has equivalent total energy use.the building has equivalent total energy use.

•• Original proposal by DOE:Original proposal by DOE:–– UU--factor may never exceed 0.55 in zones 6factor may never exceed 0.55 in zones 6--8. 8. –– Intent was to prevent builders from using cheap, Intent was to prevent builders from using cheap,

singlesingle--pane windows in the north, by trading off pane windows in the north, by trading off improved insulation or HVAC.improved insulation or HVAC.

–– Unnecessary, because market has already eliminated Unnecessary, because market has already eliminated singlesingle--pane windows in the north.pane windows in the north.

2. Trade2. Trade--off Limits or off Limits or ““Hard CapsHard Caps””•• Certain parties are trying to impose more Certain parties are trying to impose more

restrictive caps to favor their products. restrictive caps to favor their products.

•• Most restrictive caps in 2004 IECC Supplement Most restrictive caps in 2004 IECC Supplement and 2006 New York Residential Code: and 2006 New York Residential Code:

–– UU--factor may never exceed 0.40 in zones 4factor may never exceed 0.40 in zones 4--8.8.

–– SHGC may never exceed 0.50 in zones 1SHGC may never exceed 0.50 in zones 1--3. 3.

–– Illogically, would require a Illogically, would require a lowerlower UU--factor than the factor than the prescriptive requirements for skylights and prescriptive requirements for skylights and thermallythermally--isolated sunrooms isolated sunrooms when using tradewhen using trade--offs!offs!

2. Trade2. Trade--off Limits or off Limits or ““Hard CapsHard Caps””•• Hard caps save no energy!Hard caps save no energy!

–– The entire point of tradeThe entire point of trade--off methods is that the off methods is that the building has equivalent overall energy efficiency.building has equivalent overall energy efficiency.

•• Caps place artificial constraints and limit Caps place artificial constraints and limit flexibility with regards to choice of fenestration flexibility with regards to choice of fenestration products. products.

•• Discriminate against specialized products:Discriminate against specialized products:–– Glass blockGlass block–– Garden windowsGarden windows–– Metal hurricaneMetal hurricane--impact windows impact windows –– Metal sunroomsMetal sunrooms

2. Trade2. Trade--off Limits or off Limits or ““Hard CapsHard Caps””KAW Actions:KAW Actions:•• Helped modify 2006 IECC to provide more flexibility in Helped modify 2006 IECC to provide more flexibility in

zones 4zones 4--5 for metal hurricane products. 5 for metal hurricane products. UU--factor may never exceed 0.40 in zones 6factor may never exceed 0.40 in zones 6--8.8.UU--factor may never exceed 0.48 in zones 4factor may never exceed 0.48 in zones 4--5. 5. SHGC may never exceed 0.50 in zones 1SHGC may never exceed 0.50 in zones 1--3.3.Fixed skylight problem (limit U < 0.75 in zones 4Fixed skylight problem (limit U < 0.75 in zones 4--8) 8)

•• Helped convince 2006 IRC to stay with Helped convince 2006 IRC to stay with original DOE proposal.original DOE proposal.

UU--factor may never exceed 0.55 in zones 6factor may never exceed 0.55 in zones 6--8.8.Fixed skylight problem (limit U < 0.75 in zones 6Fixed skylight problem (limit U < 0.75 in zones 6--8) 8) No tradeNo trade--off limits in zones 1off limits in zones 1--5. 5.

•• Helped convince the IRC committee to completely Helped convince the IRC committee to completely remove traderemove trade--off limits in 2007 Supplement.off limits in 2007 Supplement.

Conflict with Conflict with thermallythermally--isolated isolated

sunroom sunroom requirements still requirements still

exists!exists!

Problems with the Energy CodesProblems with the Energy Codes

3.3. Energy Codes are kept separate Energy Codes are kept separate from Structural Codes.from Structural Codes.

3. Energy and Structural Performance3. Energy and Structural Performance•• The interrelationship between energy and The interrelationship between energy and

structural performance is largely ignored. structural performance is largely ignored. •• Codes often conflict, such as in the hurricane Codes often conflict, such as in the hurricane

zone which extends from zone 1 to zone 5.zone which extends from zone 1 to zone 5.•• Wind load and impact requirements often require Wind load and impact requirements often require

aluminum framing or heavy reinforcement, but aluminum framing or heavy reinforcement, but continuing to reduce Ucontinuing to reduce U--factor restricts structural factor restricts structural products.products.

•• If not resolved, problem has to be dealt with by If not resolved, problem has to be dealt with by either putting exception in local code or using either putting exception in local code or using performance alternatives.performance alternatives.

3. Energy and Structural Performance3. Energy and Structural PerformanceKAW Actions:KAW Actions: 2006 IECC Commercial Energy Code2006 IECC Commercial Energy Code•• PassedPassed critical code proposal with revised Ucritical code proposal with revised U--factor requirements factor requirements

that accommodate structural products while promoting energy that accommodate structural products while promoting energy efficiency. efficiency.

•• Previous requirements in 2004 Supplement were highly flawed:Previous requirements in 2004 Supplement were highly flawed:–– UU--factors would not have allowed aluminum operable windows or factors would not have allowed aluminum operable windows or

doors in northern half of U.S.doors in northern half of U.S.–– Favored nonmetal products, while ignoring structural requirementFavored nonmetal products, while ignoring structural requirements. s.

(vinyl windows in a highrise?!? vinyl curtainwall?!?)(vinyl windows in a highrise?!? vinyl curtainwall?!?)

•• AEC, AAMA, NBI developed compromise with revised UAEC, AAMA, NBI developed compromise with revised U--factor factor requirements that accommodate structural products.requirements that accommodate structural products.–– Clearer metal and nonmetal product categories.Clearer metal and nonmetal product categories.–– Will require increased thermal barrier, lowWill require increased thermal barrier, low--e.e.–– Will require double glazing except in Miami, Hawaii.Will require double glazing except in Miami, Hawaii.

3. Energy and Structural Performance3. Energy and Structural Performance2006 IECC 2006 IECC –– Commercial Fenestration RequirementsCommercial Fenestration Requirements

If place a sunroom on a highrise building (e.g. hotel, penthouse), use these U-factors, depending

on frame type.Also have to meet SHGC

requirements.

3. Energy and Structural Performance3. Energy and Structural PerformanceKAW Actions:KAW Actions: ASHRAE 90.1ASHRAE 90.1•• ASHRAE 90.1 is still the dominant commercial energy ASHRAE 90.1 is still the dominant commercial energy

code.code.•• Recent update to fenestration criteria (last update was Recent update to fenestration criteria (last update was

1999).1999).•• Initial proposal was highly flawed, and did not consider Initial proposal was highly flawed, and did not consider

structural requirements:structural requirements:–– UU--factor of 0.43factor of 0.43--0.47 in zones 10.47 in zones 1--44–– UU--factor of 0.32factor of 0.32--0.36 in zones 50.36 in zones 5--88–– TripleTriple--glazing down to Indianapolis, and problems for operable glazing down to Indianapolis, and problems for operable

products all the way south!products all the way south!–– Favored nonmetal windows in all zones, regardless of structural Favored nonmetal windows in all zones, regardless of structural or or

durability requirements.durability requirements.•• Successfully convinced subcommittee to adopt similar Successfully convinced subcommittee to adopt similar

categories and values as our IECC proposal.categories and values as our IECC proposal.–– Stringent but realistic for structural products. Stringent but realistic for structural products. –– They did tweak the numbers in zones 7They did tweak the numbers in zones 7--8 (N. Minnesota, Alaska).8 (N. Minnesota, Alaska).

3. Energy and Structural Performance3. Energy and Structural Performance

•• Just completed public review. Just completed public review. •• Will become an addendum to 2007 edition. Will become an addendum to 2007 edition.

Available for use, but not of part of the published standard untAvailable for use, but not of part of the published standard until il Jan 2009 midJan 2009 mid--cycle supplement, and July 2010 full standard.cycle supplement, and July 2010 full standard.

KAW Actions:KAW Actions: ASHRAE 90.1ASHRAE 90.1Changes shown on IECC table for simplicity:

0.40 0.40

0.45 0.45

0.45 for nonresidNR for resid, semiheated

Problems with the Energy CodesProblems with the Energy Codes

4.4. Long term durability of energy Long term durability of energy performance is ignored.performance is ignored.

4. 4. Long Term Energy PerformanceLong Term Energy Performance•• What matters is energy performance over the What matters is energy performance over the

lifetime of the building lifetime of the building –– not just when it is not just when it is installed.installed.

•• U, SHGC, and Air Leakage can change over time U, SHGC, and Air Leakage can change over time as different types of products degrade. as different types of products degrade.

–– Air infiltration can increase dramatically if frame deforms Air infiltration can increase dramatically if frame deforms over time from thermal and pressure cycling. over time from thermal and pressure cycling.

•• Aluminum has superior durability over vinyl, Aluminum has superior durability over vinyl, wood, and fiberglass, but amount of change is wood, and fiberglass, but amount of change is debated.debated.

•• NFRC has tried to examine this issue NFRC has tried to examine this issue (unsuccessfully) for the last 14 years.(unsuccessfully) for the last 14 years.

Other IssuesOther Issues

Fenestration Energy Rating ProgramsFenestration Energy Rating ProgramsNew New GreenGreen StandardsStandards

Fenestration Energy Rating ProgramsFenestration Energy Rating Programs

NFRC 100 and 200NFRC 100 and 200•• Current program works well for factoryCurrent program works well for factory--built built

residential products.residential products.•• Cumbersome and expensive for siteCumbersome and expensive for site--built built

commercial productscommercial products–– Not suited to wide product variation and involvement of Not suited to wide product variation and involvement of

different parties (frame manufacturer, glass fabricator, different parties (frame manufacturer, glass fabricator, glazing contractor, etc.)glazing contractor, etc.)

–– Largely ignored for curtainwall, storefront, etc.Largely ignored for curtainwall, storefront, etc.•• Does it work for siteDoes it work for site--built sunrooms?built sunrooms?

Fenestration Energy Rating ProgramsFenestration Energy Rating ProgramsAAMA 507AAMA 507•• Developed especially for rating commercial products.Developed especially for rating commercial products.•• Based on data from NFRC simulations and tests, but more Based on data from NFRC simulations and tests, but more

flexible for determining wholeflexible for determining whole--product U and SHGC as a product U and SHGC as a function of centerfunction of center--ofof--glass values and actual size.glass values and actual size.

•• Easier and less expensive for industry, and will also Easier and less expensive for industry, and will also increase enforcement increase enforcement –– good for everyone. good for everyone.

•• AEC, GANA, Conner submitted joint proposal to allow AEC, GANA, Conner submitted joint proposal to allow AAMA 507 as alternative to NFRC AAMA 507 as alternative to NFRC sitebuiltsitebuilt ratings for ratings for fenestration in commercial buildings. fenestration in commercial buildings. –– Not approved at preliminary hearings, but modified proposal Not approved at preliminary hearings, but modified proposal

will be voted on at final hearings.will be voted on at final hearings.

Fenestration Energy Rating ProgramsFenestration Energy Rating Programs

NFRC ComponentNFRC Component--Based Modeling Approach (CMA)Based Modeling Approach (CMA)–– New rating program under development.New rating program under development.–– Component approach similar to AAMA 507, where Component approach similar to AAMA 507, where

individual components (frame, glass, and spacer) are individual components (frame, glass, and spacer) are combined into final wholecombined into final whole--product rating.product rating.

–– New rating procedure will be big improvement over siteNew rating procedure will be big improvement over site--built procedure, built procedure, ifif it is simple and costit is simple and cost--effective. effective.

–– Potentially better than AAMA 507, but costs and final Potentially better than AAMA 507, but costs and final outcome are still very uncertain.outcome are still very uncertain.

–– Initial focus is commercial fenestration, but could be Initial focus is commercial fenestration, but could be important to sunrooms (especially siteimportant to sunrooms (especially site--built). built).

New New GreenGreen StandardsStandards•• National Green Building StandardNational Green Building Standard

–– NewNew standard for highstandard for high--performance green homes. performance green homes. –– Joint collaboration between NAHB and ICC.Joint collaboration between NAHB and ICC.–– Could compete with LEED for Homes program from USGBC.Could compete with LEED for Homes program from USGBC.

•• ASHRAE 189ASHRAE 189–– NewNew standard for highstandard for high--performance sustainable commercial performance sustainable commercial

buildings buildings (not including low(not including low--rise residential)rise residential)..–– Joint collaboration between ASHRAE, USGBC, and IESNA.Joint collaboration between ASHRAE, USGBC, and IESNA.–– Written as a standard, Written as a standard, notnot a design guide. Initially voluntary, a design guide. Initially voluntary,

but could likely replace LEED in mandatory codes but could likely replace LEED in mandatory codes (e.g. government buildings). (e.g. government buildings).

•• Both will be important to monitor.Both will be important to monitor.–– For both, first public review draft expected by July.For both, first public review draft expected by July.

To find out more about KAW, contact:To find out more about KAW, contact:•• Aluminum Extruders CouncilAluminum Extruders Council ((mail@aec.orgmail@aec.org))•• Greg Patzer (Greg Patzer (gpatzer@tso.netgpatzer@tso.net))•• Tom Culp (culp@birchpointconsulting.com)Tom Culp (culp@birchpointconsulting.com)