Heatiator ECO-ADV-WS22 Manual

A SERVICE OF

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Heatilator•ECO-ADV-WS22•7057-128C•August13,2010

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



Thekvalueindicatestheamountofheat(inBTU’s)thatwillow

in1hourthrought1squarefootofauniformmaterial1inchthick

foreachdegree(F)oftemperaturedifferencefromonesideof

thematerialtotheother.TheLOWERthekfactormeansless

heatisbeingconductedthroughthenon-combustiblematerialto

thecombustiblematerialbeneathit.Thekvalueofamaterial

mustbeequalorsmallerthentherequiredkvaluetobeaccept-

able.

 (BTU)(inch)

  (foot

2

(hour)(

o

F)



The R value is a measure of a material’s resisteance to heat

transfer.Rvalueisconvenientwhenmorethanonematerialis

usedsinceyoucanaddtheRvaluestogether,whereasyoucan

notdothisfor kvalue.TheHIGHERtheRfactormeansless

heatisbeingconductedthroughthenon-combustiblematerialto

thecombustiblematerialbeneathit.TheRvalueofamaterial

mustbeequalorlargerthentherequiredRvaluetobeaccept-

able.



Divide1bykandmultiplytheresultstimesththicknessininches

ofthematerial.

 R=1/kxinchesofthickness



DividetheinchesofthicknessbyR.

 k=inchesofthickness/R

Calculatons:

Example:Floorprotectionrequireskvalueof.84,3/4inchthick.

Alternativematerialhasakvalueof.6andis3/4inchthick.

Divide.6by.75=kvalueof.80.Thiskvalueissmallerthan.84

andthereforeisacceptable.