#SHC Web http://www.engineeringtoolbox.com/specific-heat-solids-d_154.html

from pint import UnitRegistry 
u = UnitRegistry ()

The next cell quanitfies my estimates for the area of a rectangular prism that is modeled to be the ETC.

#size of box
length = (16 * u.inch).to (u.feet)
width = (12 * u.inch).to (u.feet)
height = (12 * u.inch).to (u.feet)
window = (64 * u.inch**2).to (u.feet**2)
surface_area_Box = 2 * (width*length + height*length + height*width)
surface_area_cb = surface_area_Box - window
#List of R-Val
rval_cardboard = 3 * (u.ft**2 * u.degR *u.hr / u.BTU)
rval_box = rval_cardboard * (1/4)
rval_foam = 1.93 * (u.ft**2 * u.degR *u.hr / u.BTU) 
rval_InAF = .68 * (u.ft**2 * u.degR *u.hr / u.BTU)
rval_OutAF = .17 * (u.ft**2 * u.degR *u.hr / u.BTU)
rval_WAF = .68 * (u.ft**2 * u.degR *u.hr / u.BTU)
#UA of box and window 
RVAL_CB = rval_box + rval_foam + rval_InAF + rval_OutAF
RVAL_WIN = rval_InAF + rval_OutAF + rval_WAF
UA_CB = (1 / RVAL_CB) * surface_area_cb
UA_WIN = (1 / RVAL_WIN) * window
TOT_UA = UA_CB + UA_WIN
TOT_UA

The next cell creates the UA product for the english value