you are "buying a house" so you have already put in an offer,
and that would denote that your do not have a Realtor reprenenting you,
and you "need to know what kind of heat.."
so you can't call your Realtor, you do not have good info on the house, and you are not getting inspections?
Do you know what the term "CAVIAT EMPTOR" means?
Good luck and may God bless