Duct and Blower Door Testing Calculator

8/9/2019 Duct and Blower Door Testing Calculator

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Washington State Energy CodeDuct and Blower Door TestingCalculator For All Residential Occupancies

2010 Edition, September 1, 2010

WSUEEP10-028Prepared b! "u#e $o%ard, &ar'ordeen, Emil Sal(ber)

Funded in part b! *+e US epartment o. Ener) /'ort+%est Ener) EciencAlliance

Was+in)ton State UniersitEtension Ener) Pro)ram304 Plum Street SEPO 5o 6714Olmpia, WA 38406-714

E-mail!Ener)9ode:ener)%suedu







Duct Testing Code Language

Air Leakage Testing Code Language

'*+,+* Sealing" All ducts, air +andlers, Clter boes, and buildin) caities used as ductsseams s+all compl %it+ Section >1017 o. t+e Gnternational Residential 9ode or Section >ec+anical 9ode uct ti)+tness testin) s+all be conducted to eri. t+at t+e ducts are seadocumentin) t+e test results s+all be proided to t+e Hurisdiction +ain) aut+orit b t+e teb t+e buildin) ocial, t+e test s+all be conducted in t+e presence o. department staI ub eit+er o. t+e .ollo%in)!

Post-construction test! "ea#a)e to outdoors s+all be less t+an or e@ual to c.m per 100 s@Door area or a total lea#a)e less t+an or e@ual to 8 c.m per 100 s@uare .eet o. conditionedpressure diIerential o. 01 inc+es %) <24 Pascals= across t+e entire sstem, includin) t+eenclosure All re)ister boots s+all be taped or ot+er%ise sealed durin) t+e testRou)+-in test! *otal lea#a)e s+all be less t+an or e@ual to c.m per 100 s@uare .eet o. cotested at a pressure diIerential o. 01 inc+es %) <24 Pascals= across t+e rou)+ed-in sstemanu.acturerKs air +andler enclosure All re)ister boots s+all be taped or ot+er%ise sealed+andler is not installed at t+e time o. t+e test, total lea#a)e s+all be less t+an or e@ual to 6conditioned Door area ECET!./S"

1 uct ti)+tness test is not re@uired i. t+e air +andler and all ducts are located %it+in cond

2 uct ti)+tness test is not re@uired i. t+e .urnace is a nondirect ent tpe combustion appunconditioned space A maimum o. si .eet o. connected duct%or# in t+e unconditioned sadditional suppl and return ducts s+all be %it+in t+e conditioned space ucts outside t+esealed %it+ a mastic tpe duct sealant and insulated on t+e eterior %it+ R-8 insulation .or%ater resistant insulation %+en %it+in a slab or eart+

'&+0+' Building Air Leakage Testing" 5uildin) enelope air lea#a)e control s+all be cotested to +ae an air lea#a)e less t+an 000070 SpeciCc "ea#a)e Area <S"A= %+en testedo. 40 Pascals <02 inc+ %)= *estin) s+all occur at an time a.ter rou)+ in and a.ter installabuildin) enelope, includin) penetrations .or utilities, plumbin), electrical, entilation, andsealin) t+ereo. W+en re@uired b t+e buildin) ocial, t+e test s+all be conducted in t+e pr

*+e blo%er door test results s+all be recorded on t+e certiCcate re@uired in Section 1046

ECET!./S", Additions less t+an L40 s@uare .eet&+ Once isual inspection +as conCrmed t+e presence o. a )as#et <see Section 4026=, opemanu.actured b small business s+all be permitted to be sealed oI at t+e .rame prior to t+SpeciCc "ea#a)e Area <S"A= s+all be calculated as .ollo%s!

S"A M <9F>40 0044=B<9FA 166=W+ere!9F>40 M 5lo%er door .an Do% at 40 Pascal pressure diIerence9FA M 9onditioned Floor Area o. t+e +ousin) unit

urin) testin)!Eterior %indo%s and doors, Creplace and stoe doors s+all be closed, but not sealedampers s+all be closed, but not sealedN includin) e+aust, inta#e, ma#eup air, bac# dra.t,Gnterior doors connectin) conditioned spaces s+all be openN access +atc+es to conditionedconditioned attics s+all be openN doors connectin) to unconditioned spaces s+all be closedEterior openin)s .or continuous operation entilation sstems and +eat recoer entilatosealedN

$eatin and coolin s stem<s= s+all be turned oIN



$A9 ducts suppl and return re)isters s+all not be sealed



ion)

r Test) *est Result <S"A=

9alculated *ar)et

*est2 9F>

24

9alculated *ar)et

*est2 9F>

24

ation o. insulation andeal inte)rit i. standard is

+ to pressuri(e t+e +ome

in a duct test

WS1" Enter ro2ect andtest in3or4ation into thegreen cells only+ Targetcells will auto4aticallycalculate+



s+all be sealed oints and073 o. t+e Gnternationaled A si)ned adaitstin) a)ent W+en re@uiredt ti)+tness s+all be eriCed

are .eet o. conditionedoor area %+en tested at aanu.acturerJs air +andler

ditioned Door area %+en, includin) t+eurin) t+e test G. t+e airc.m per 100 s@uare .eet o.

tioned space

iance installed in anace is allo%ed Allconditioned space s+all beaboe )rade ducts and R-4

sidered acceptable %+ent+ a blo%er door at a pression o. penetrations o. t+eombustion appliances andsence o. department staI

able %indo%s and doorstest

and Due dampersNra%l spaces and

but not sealedNs s+all be closed and



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Duct and Blower Door Testing Calculator