I searched the internet for the last 2 hours learning and understanding the Watt/Watt Hour/BTU conversions using data collected.

I am not sure what I might be missing, but Wikipedia has supported that a defined Watt ~ 3.412 BTUs.

Some simple constants:

1 Watt (W) = 1 Joule per second

1 BTU ~ 1055.05585 J

1 hour (h) = 3600 seconds (s)

So, inherently, a simple formula can be derived to convert BTUs into what I believe should be Watts:

W = Joules(BTU)/Seconds(Time Elapsed) OR 1055.05585/3600 ~ .293 W Rating

Their number of 3.412 has apparently been used by applying:

W = Seconds/Joules OR 3600/1055.05585 ~ 3.412 W

This makes no sense to me and appears to be the inverse of a Watt.

Once the Watt has been calculated, you simply multiply by the time of usage:

Watts * Time (in hours)