Conductivity
		W/mK	btu/in hour ft2 F	btu/ ft hour ft2 F	W / cm2 C /cm	W / m2 C / cm	USE:
	Ordinary glass	0.80000000	5.54677744	0.46223145	0.00799984	79.99839761	80.00000000
	Window pane	0.10000000	0.69334718	0.05777893	0.00099998	9.99980000	10.00000000
	Brick red	0.60000000	4.16008308	0.34667359	0.00599988	59.99879821	60.00000000
	Brick insulative	0.15000000	1.04002077	0.08666840	0.00149997	14.99969955	15.00000000
	Wood	0.05000000	0.34667359	0.02888947	0.00049999	4.99989985	5.00000000
	Concrete	0.80000000	5.54677744	0.46223145	0.00799984	79.99839761	80.00000000
		k to be used for heat measured in WATTS, thickness in CM, area in M2, temp. diff in C