Synthetic Insulation Calculator

[Chambers]

Im now looking further and further into this pea pod underquilt and Im wondering how people calculate how much insulation to use. Ive decided on Primaloft as it seems to be the closest to down as possible with better performance in the wet.

So anyway. Does anyone have a formula that will help me work out how much to use for the area I will have or so I coule roughly calc a temperature rating? Surely there must be something as otherwise how would manufacturers work out their sleeping bag season ratings

Any help would be great, thanks guys

 

[lannyman8]

not sure Rich, would it be by TOG like in quilts, as in 13 tog for winter, worth a thought...

what does the manufacturers guide say, it should give a rough guide as to what thickness they recommend....

regards and best of luck with it.

chris

 

[resnikov]

Which primaloft and what weight are you using?

 

[Teepee]

1" of loft for every 20 deg Farenheit below 70F is the guideline for insulaton.

 

[PDA1]

Ray Jardine gives some non metric data in the quilt section of his web site. Insulation is covered in
http://www.rayjardine.com/ray-way/Quilt-Kit/index.htm
the insulation used is not named, but is Primaloft. Works out at about 20 deg f per inch.
Great hints on making a quilt also

 

[Chambers]

Which primaloft and what weight are you using?

Unknown as yet, that was why I was hoping to see how they calc up so I could work out price etc

1" of loft for every 20 deg Farenheit below 70F is the guideline for insulaton.

Thanks guys I'll work to that roughly and that it from there.

Thanks