A hundred years ago, homes were more easily heated when they were small. Fast-forward to the present day, and homeowners are free to embrace open floor plans more in tune with the casual tenor of contemporary life. By erasing the barriers between adjoining rooms, you can achieve a brighter, airier, and arguably more inviting arrangement of space. Of course, demolition work isn't necessarily a do-it-yourself affair. Consult a contractor for advice on how to proceed.