Calculate the R value of (a) a window made of a single pane of flat glass in thick, and (b) A thermal window made of two single panes each in thick and separated by a in air space (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of ...

a b c R 0890 ft FhBtu The insulating glass in the table must have sheet ...

Calculate the R value of (a) a window made of a single pane of flat glass in.

Question:

Calculate the R value of
(a) a window made of a single pane of flat glass ⅛ in. thick, and
(b) A thermal window made of two single panes each ⅛ in. thick and separated by a ¼ in air space.
(c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single pane window?