Laura - Depreciate the gas stove over 7 years and the AC/Heating over 39 years.
The business use percent is your time-space percentage. If you don't know how to calculate this, give me the following information and I'll calculate it for you:
Total square feet of the home (include basement and garage)
Square feet of home used regularly for your business
Number of hours you work in the home (including hours spent caring for children and house spent on business activities after the children are gone)
Number of weeks you were in business in 2010
BTW: if your AC/Heating is energy efficient you are eligible for the energy tax credit. For more info:
http://www.tomcopelandblog.com/2011/...providers.html