Assertion: insulation's effectiveness | /r/HasProperty | evaluated by its r-value
Facets:
value: commonly
type: TEMPORAL
value: in units of k⋅w−1⋅m2
type: OTHER
Source sentences:
text: The effectiveness of bulk insulation is commonly evaluated by its R-value, of which there are two - metric (SI) (in units of K⋅W−1⋅m2) and US customary (in units of °F·ft2·h/BTU), the former being 0.176 times the latter, or the reciprocal quantity the thermal conductivity or U value W.K−1⋅m-2.