I can sure use some help calculating the amount of hot water baseboard
heat needed for a finished basement. I tried using some traditional
heat loss calculations, but I'm not sure how to account for a 2x4
insulated outside room wall that is next to the basement cinderblock
wall.

Between the cinderblock wall ("=" and "|") and the insulated walls
("*") is about 12 inches of space. In this space is the sewer pipe.

============|
| ****|
| * *|
| **** *|
| * *|
| * *|
| * *|
| * *|
| *******|
============|

The room has two small basement windows and a doorway to upstairs. The
ceiling is 7ft. All walls -- interior facing and cinderblock facing --
are insulated with R13. The floor is a slab and the basement is never
below 62 in winter (the house in in northern NJ). Above the ceilings
are rooms. About 80 linear feet of interior wall is facing the
cinderblock wall.

I am planning on using hot water, but I would love to hear some
opinions on using electric for this scenario. The room will be used as
a playroom for kids and it will be heated mostly after school and
weekends.


Any help is greatly appreciated.

Best regards,

John