Insulation R Values: feathers
Insulation R-values and thermal conductivity data from NIST SRD 81 — covers fiberglass, foam, cellulose, mineral wool, and other building insulation materials
| material id | record id | date | delta t (F) | delta x (in) | density (lb/ft3) | description | form | k w mk (W/mK) | material | mean temp (F) | r value per inch (ft2hF/BTU/in) | rsi per inch (m2K/W/in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| feathers | 332 | 6/5/1943 | 14.01 | 1.011 | 1 | Domestic duck down; 1 in. | Loose | 0.2548 | Feathers | 103.67 | 0.566044 | 0.099686 |
| feathers | 333 | 6/7/1943 | 14.54 | 1.006 | 2.5 | Turkey feather fiber (down?); 1 in. | Loose | 0.2385 | Feathers | 103.96 | 0.604729 | 0.106499 |
| feathers | 353 | 12/14/1943 | 21.43 | 0.778 | 1.58 | 50 % chicken, 50 % turkey, fluffed, placed in balloon-cloth, 3/4 in. | Loose | 0.2393 | Feathers | 77.05 | 0.602707 | 0.106143 |
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