Legal Definition of a Bedroom in Indiana

[Eric Long]

I am looking at a duplex with a 1/1 on the main floor and 3/1 on the top floor. When I was on the top floor I notice one room only had a space heater for heat, which I thought did not qualify as a heat source. 

Another question, on the main floor there is an area that could qualify as a bedroom however it has a door leading directly to the attached garage. If it was locked both ways, could it count as bedroom (everything else to satisfy a bedroom requirement should be met)?

I've hopelessly been looking on google for this answer and past BP forum posts didn't yield any results. Thanks in advance!