A home inspection will look at the systems that make up the building such as :
Structural elements, foundation, framing etc. , Plumbing systems , Roofing , Electrical systems , Cosmetic condition , paint , siding etc
Have your furnace system serviced to ensure it's working efficiently and not emitting carbon monoxide. Clean permanent furnace filters and replace paper or disposable filters. If you have a wood stove or fireplace, have your chimney swept thoroughly. It should be cleaned before the soot build up reaches one-fourth inch thickness inside the chimney flue. Check the attic to see if insulation needs to be added or replaced, This is the most significant area of heat loss in many homes, so it is also important to see that it has proper ventilation. Inadequate ventilation could lead to premature deterioration of the insulation materials.You may also need to check insulation in exterior walls, crawl spaces and along foundation walls.