Houseaddressorlot#:ConditionedFloorArea:

Ducttesterlocation:Pressuretaplocation:

Ring(ifapplicable): Open 123

TestMethod&Standard1

Test2

CFM25AirHandlerPresent

6CFM25per100sfofCFAAirHandlernotPresent

4CFM25per100sfofCFA

TestMethod&Standard1

Test2

CFM25AirHandlerPresent(TotalLeakage)

8CFM25per100sfofCFAAirHandlerPresent(LeakagetoExterior)

6CFM25per100sfofCFA1.TestresultsmustcomplywithoneoftheStandardsoptions.2.TestCFM25mustbeequaltoorlessthanthecalculatedtarget.

StandardTestedCFM50

Glossary

SLA:Specificleakagearea

((______CFM50X0.055)(______CFAX144))=SLA

_________dividedby________=SLA0.00030SLA __________

SLA=__________

CalculatedTarget

.04X________CFA__________CFM25

CalculatedTarget

.08X________CFA__________CFM25

CalculatedTestResult

PostConstruction:Atornearfinalinspection.Thehomemustbecompleteenoughtopressurizethehometo25pa.

CFM25:Cubicfeetperminuteofairleakageat25pascalsofpressure

TotalLeakage:Aggregationoftheentiresystemsductleakageinaducttest.LeakagetoExterior:AggregationofallductsystemleakstotheexterioroftheCFAinaducttest.CFA:Conditionedfloorarea

DucttestingCalculator(NewConstruction)

AirLeakagetestingCalculator(BlowerDoorTest)

CFM50:Cubicfeetperminuteofairleakageat50pascalsofpressure

RoughIn:Afterinstallationofthecompleteairdistributionsystembutbeforeinstallationofinsulationandsheetrock.Allowsforaccesstoallductseamsandconnectionsforreevaluationofsealintegrityifstandardisnotmetinintitialtest.

Pascal(pa):Unitofpressure

AtRoughin(TotalLeakage)

PostConstruction

__________

__________

.06X________CFA__________CFM25

__________

__________

.06X________CFA__________CFM25

DuctTestingCodeLanguage

AirLeakageTestingCodeLanguage

503.10.3Sealing:Allducts,airhandlers,filterboxes,andbuildingcavitiesusedasductsshallbesealed.JointsandseamsshallcomplywithSectionM1601.3oftheInternationalResidentialCodeorSection603.9oftheInternationalMechanicalCode.Ducttightnesstestingshallbeconductedtoverifythattheductsaresealed.Asignedaffidavitdocumentingthetestresultsshallbeprovidedtothejurisdictionhavingauthoritybythetestingagent.Whenrequiredbythebuildingofficial,thetestshallbeconductedinthepresenceofdepartmentstaff.Ducttightnessshallbeverifiedbyeitherofthefollowing:Postconstructiontest:Leakagetooutdoorsshallbelessthanorequalto6cfmper100squarefeetofconditionedfloorareaoratotalleakagelessthanorequalto8cfmper100squarefeetofconditionedfloorareawhentestedatapressuredifferentialof0.1inchesw.g.(25Pascals)acrosstheentiresystem,includingthemanufacturersairhandlerenclosure.Allregisterbootsshallbetapedorotherwisesealedduringthetest.Roughintest:Totalleakageshallbelessthanorequalto6cfmper100squarefeetofconditionedfloorareawhentestedatapressuredifferentialof0.1inchesw.g.(25Pascals)acrosstheroughedinsystem,includingthemanufacturer'sairhandlerenclosure.Allregisterbootsshallbetapedorotherwisesealedduringthetest.Iftheairhandlerisnotinstalledatthetimeofthetest,totalleakageshallbelessthanorequalto4cfmper100squarefeetofconditionedfloorarea.EXCEPTIONS:1.Ducttightnesstestisnotrequirediftheairhandlerandallductsarelocatedwithinconditionedspace.2.Ducttightnesstestisnotrequiredifthefurnaceisanondirectventtypecombustionapplianceinstalledinanunconditionedspace.Amaximumofsixfeetofconnectedductworkintheunconditionedspaceisallowed.Alladditionalsupplyandreturnductsshallbewithintheconditionedspace.DuctsoutsidetheconditionedspaceshallbesealedwithamastictypeductsealantandinsulatedontheexteriorwithR8insulationforabovegradeductsandR5

502.4.5BuildingAirLeakageTesting: Buildingenvelopeairleakagecontrolshallbeconsideredacceptablewhentestedtohaveanairleakagelessthan0.00030SpecificLeakageArea(SLA)whentestedwithablowerdooratapressof50Pascals(0.2inchw.g.).Testingshalloccuratanytimeafterroughinandafterinstallationofpenetrationsofthebuildingenvelope,includingpenetrationsforutilities,plumbing,electrical,ventilation,andcombustionappliancesandsealingthereof.Whenrequiredbythebuildingofficial,thetestshallbeconductedinthepresenceofdepartmentstaff.TheblowerdoortestresultsshallberecordedonthecertificaterequiredinSection105.4.EXCEPTIONS:1.Additionslessthan750squarefeet.2. Oncevisualinspectionhasconfirmedthepresenceofagasket(seeSection502.4),operablewindowsanddoorsmanufacturedbysmallbusinessshallbepermittedtobesealedoffattheframepriortothetest.SpecificLeakageArea(SLA)shallbecalculatedasfollows:

SLA =(CFM50x0.055)/(CFAx144)Where:CFM50 =Blowerdoorfanflowat50PascalpressuredifferenceCFA =ConditionedFloorAreaofthehousingunit

Duringtesting:Exteriorwindowsanddoors,fireplaceandstovedoorsshallbeclosed,butnotsealed.Dampersshallbeclosed,butnotsealed;includingexhaust,intake,makeupair,backdraft,andfluedampers;Interiordoorsconnectingconditionedspacesshallbeopen;accesshatchestoconditionedcrawlspacesandconditionedatticsshallbeopen;doorsconnectingtounconditionedspacesshallbeclosedbutnotsealed;Exterioropeningsforcontinuousoperationventilationsystemsandheatrecoveryventilatorsshallbeclosedandsealed;Heatingandcoolingsystem(s)shallbeturnedoff;HVACductssupplyandreturnregistersshallnotbesealed.