For comparison, the SI unit of thermal resistance is R = K.m²/W, and 1 ft² F° h / Btu = approx. 0.1761 K.m²/W.
... Barrow-in-Furness[?] Kendal Museum[?] Museum of Lakeland Life[?], Kendal[?] Tullie House Museum, Carlisle Derby and Derbyshire Derby Industrial Museum[?] Derby ...