Insulation guidelines and conduction factor

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&ollo'

(oste) on *+ne , 20,, 1hermaxx *ackets

he R Factor, K Factor and C Factor of Insulation

Ins+lation terms can e +ite conf+sin to an one o+tsi)e the in)+str . If o+45e e5er

o+ ht ins+lation for o+r ho+se o+ kno' that ins+lation 'ith a hi h $ factor is etter.+t 'hat exactl )oes that mean7 8i) o+ kno' that the $ &actor )e en)s on other

factors7

:hen it comes to + in more s ecific ins+lation ro)+cts like remo5a le ins+lation

jackets for hot i es +n)erstan)in the artic+lars of the three meas+res of ins+lation is

ke . In or)er to +n)erstan) the 'ell-kno'n $ factor it4s im ortant to +n)erstan) the

factors + on 'hich it relies the ; factor an) C factor.

If o+ are seekin o+t the form+las to calc+late these factors check o+t o+r $ C < ; &actor &orm+la Con5ersion

1a le that lists all the form+las )isc+sse) in this article. &or more information rea) on=

I :ant

; &actor C &actor $ &actor

I>a5e

; &actor C?;-factor/in. of

thickness

$? in. of thickness/;-

factor

C &actor ;?C-factor in. of

thickness

$?,/C-factor

$ &actor ;?in. of thickness / $-

factor

C-,/$-factor

None of

the

o5e

;? 1"-in / hr ft A& C? 1"/Bhr C ft C A&D $?hC ft C A&/ 1"

he K Factor of Insulation

W at is t e K Factor of Insulation?

1he ; factor of ins+lation re resents the material4s thermal con)+cti5it or a ilit to con)+ct heat. "s+all ins+lation

materials ha5e a ; &actor of less than one. 1he lo'er the ; factor the etter the ins+lation. 1he text ook )efinition of

Insulation Ratings: R Factor, K Factor & C Factor

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Pagina 1 di 16Insulation Ratings: Calculating R Factor, K Factor & C Factor

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the ; factor is E1he time rate of stea) heat flo' thro+ h a +nit area of homo eneo+s material in)+ce) a +nit

tem erat+re ra)ient in a )irection er en)ic+lar to that +nit area.F 1hat4s a mo+thf+l.

Sim lifie) the ; factor is the meas+re of heat that asses thro+ h one s +are foot of material that is one inch thick in

an ho+r.

Ho" #o I Calculate t e K Factor of Insulation?

If $ factor is +nkno'n the form+la to calc+late the ; factor of ins+lation isG

; factor ? 1"-in / hr ft A&

or

ritish 1hermal "nit-Inch (er S +are &oot (er >o+r (er &ahrenheit 8e ree

If $ factor is kno' this easier form+la can e +se) to calc+late the ; factorG

; factor ? inches of thickness / $ &actor

Ho" is t e K Factor of Insulation Re$orted?

; factors are re orte) at one or man mean tem erat+res. 1he mean tem erat+re is the a5era e of the s+m of the

hottest an) col)est s+rface tem erat+res 'hich the ins+lation material is ex ose) to.

(+t more sim l the testin a arat+s that )etermines the ; factor of an ins+lation material laces a sam le of the

material et'een t'o lates hot < col) an) the a5era e of the s+rface tem erat+res of those t'o lates e +als the

mean tem erat+re. >ere is an exam le of an ins+lation material4s ; factor re ortG

5ia Nomaco Ins+lation

Notice that as the mean tem erat+re rises so )oes the ; factor. It4s im ortant to o ser5e the ; factor < mean

tem erat+re 'hen com arin ins+lation.

he C Factor of Insulation

W at is t e C Factor of Insulation?

1he C factor stan)s for 1hermal Con)+ctance &actor. 1he C factor like the ; factor is a rate of heat transfer thro+ h

a material. 1he lo'er the C factor the etter the ins+latin ro erties of the material. It is the +antit of heat that

asses thro+ h a foot of ins+lation material.

1he C factor is )e en)ent + on the thickness of the ins+lation. 1he thicker the ins+lation is the lo'er the C factor 'ill

e an) th+s the etter the material 'ill e at ins+latin . 1his is one of the main )ifferences et'een the ; factor an)

C factor eca+se enerall the thickness of an ins+lation material 'ill not affect its ; factor.

Ho" #o I Calculate t e C Factor of Insulation?

2




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ima e *ack mick

If the ; factor is +nkno'n the form+la to calc+late the C factor of ins+lation isG

1"/Bhr ft A&D

or t+s/ho+r er s +are foot er )e ree & of tem erat+re )ifference

If the ; factor is kno'n this easier form+la can e +se)G

C factor ? ; factor / inches of thickness

he R Factor

W at is t e R Factor of Insulation?

1he $ factor +lls to ether all of the information of the other factors an)

makes it eas to j+) e the effecti5eness of ins+latin material. 1he $ factor

of ins+lation can e fo+n) most easil of the ins+lation factors )isc+sse)

an) it is the most o +lar in)icator of a material4s ins+lator ro erties.

Henerall it is liste) on an ins+lation material4s la el. 1he $ factor stan)s for

thermal resistance. 1he hi her the $ factor the etter the ins+lation.

1he text ook )efinition for $ &actor isG the +antit )etermine) the

tem erat+re )ifference at stea) state et'een t'o )efine) s+rfaces of a

material or constr+ction that in)+ces a +nit heat flo' thro+ h a +nit area.

ren4t text ooks s+ ose) to e hel f+l7

1o sim lif the $ factor is a 5aria le 5al+e that meas+res the a ilit of a

material to lock heat rather than ra)iate it. 1he 5aria le is the C factor 'hich is )e en)ent + on the thickness of the

material. It is the o osition to the flo' of heat ener .

Ho" #o I Calculate t e R Factor of Insulation?

1here are a fe' form+las to calc+late the $ factor of ins+lation )e en)in on if o+r ; factor an) C factor are kno'n.

If the are +nkno'n o+ can +se this form+laG

h ft A&/ t+

or

)e rees & times s +are feet of area times ho+rs of time er t+s of heat flo'

If o+r ; factor an) C factor are kno'n o+ can +se these form+las 'hich ma e easier to +seG

$-factor ? , / C-factor

or

$-factor ? thickness in inches / ;-factor

;ee in min) that these factors are s ecific to the materials ein meas+re). &or instance if o+ take t'o ieces of

attin that are rate) at $ ,, an) +t them to ether o+ 'on4t et $ 22 co5era e. "n)erstan)in the ins an) o+ts of

the factors that hel )escri e ho' effecti5e ins+lation material is 'ill o a lon 'a to hel in make the + in

rocess easier.


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!out herma%% &ac'ets1hermaxx *ackets 'as fo+n)e) o5er 2 ears a o 'ith a sin le +r oseG to sa5e ener 'hen tra)itional sta -in- lace ins+lation isnot ractical. Com inin ex ertise in heat loss 'ireless monitorin ins+lation )esi n an) se5eral other )isci lines 'e45e ecomethe J, ro5i)er of remo5a le ins+lation jackets an) co5ers.Vie' all osts 1hermaxx *ackets

1his entr 'as oste) in $ecent Ne's < " )ates. ookmark the ermalink.

( Res$onses to Insulation Ratings: R Factor, K Factor & C Factor

(in ackG Ins+lation material for heat an) so+n) K /ein )aLLler.com

s0e) moha/at ali sa sG + +st ,M 20,3 at 2G 2 am

i nee) to kno' the k factor of o+r coolin t+nnel 'e ha5e am ient of 26 )e c an) 'e nee) tem insi)e t+nnel 6 )e c 'hatsho+l) e the k factor an) 'hat sho+l) e the )encit of + foam 7

$e l

:ill jones sa sG + +st 22 20,3 at 3G0 m

>i S e)

It seems o+ are askin a o+t a t+nnel rather than a i e or 5al5e. Is that correct7

$e l

>eather sa sG No5em er 20,3 at 2G,9 am

EIns+lation $atin sG Calc+latin $ &actor ; &actor

< C &actorF en)e) + ein en+inel com ellin an)insi htf+l= :ithin the resent )a societ that4s trick to )eli5er.1hx #arlene

$e l

O+is P. $i5era sa sG ril 9 20, at ,G 9 m

>i

I o+ ht a freeLer 'ith ,00Q ri i) "rethane ins+lation. It 'as o+re)-in- lace 'ith )ensit of 2.2 O s/c+ ft ; ? 0.,2 "?0.02$? 0. 1his ins+lation ot 'et 'ith , allon of 'ater in a ftx ft anel. Since "rethane is a h rosco ic material )oes thismaterial 'ith these s ecifications a sor lar e amo+nt or small amo+nt of 'ater7

$e l

1o)) ook sa sG ril , 20, at ,,G M am

C+re) ol +rethane foam a sor s 5er little 'ater an) the foam str+ct+re sho+l) e close) cell so that 'ater cannotinfiltrate thro+ h the ins+lation either. I 'o+l) ex ect the 'ater to make 5er little )ifference in the erformance of theins+lation.

$e l

H 6aker sa sG Pa , 20, at G 2 m




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#x an)next re5io+sClose

(re5io+s0/0

Next

>a5e 2 fi er lass 'ra aro+n) )+ct. R., so+n) liner in other )+cts R..!+estion 'hat is the E;F factor )ifference et'een these t'o ins+lations

$e l

:ill *ones sa sG Pa ,9 20, at 6G, m

1he +nits for E;F are t+-in/hr-ft -A& B>o' man 1"4s 'ill ass thro+ h a ,F thick iece ,2Fx ,2F s +are in one ho+r er)e ree of tem erat+re )ifferential. In or)er to com are E;F factors 'e m+st look at each )ifferent t e of material at thesame tem erat+re. Post )ata I45e seen +ses M & for the tem erat+re constant.8+ct 'ra G 0.3 t+-in/hr-ft -A&H roc So+n) locG 0.3 t+-in/hr-ft -A&*ohn Pansfiel) # +i ment S in lassG 0.23 t+-in/hr-ft -A&'ens Cornin M00 series so+n) oar) G 0.2 t+-in/hr-ft -A&1he lo'er the E;F factor the etter the thermal ins+latin ro erties of the material.

$e l

:hoTs sa5in mone 'ith 1hermaxx *ackets7

Sa5e Pone Sa5e #ner .

1hermaxx *ackets ins+late an) rotect i es 5al5es

an) machiner in all t es of en5ironments

)ramaticall re)+cin ener costs.

,2 92 ,M31otal C+stomer 1"Ts (er >o+r Sa5e)=

>o' m+ch can o+ sa5e7

>a5e a +estion or rea) to or)er7 Call B203D 932-9639 or sk a !+estion

1hermaUU *ackets OOC. K ,6 >amilton Street :est >a5en C1 06 ,6 K B203D 932-9639 K [email protected]

ll $i hts $eser5e).

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Insulation guidelines and conduction factor