Windows do not let in fresh air unless they are open, but your house has sufficient air inlets, (exhaust fan ducts, range hood duct, infiltration around doors and windows, fireplaces, etc,) that combustion will not create a problem. And ranges are designed to install on wood floors and next to wood cabinets. The only critical dimension is the cabinet above the range and that is either high enough otherwise you could not use it, or you have a range hood which satisfies the non-combustible requirement.