Making Ottawa Winters More Comfortable and Affordable   Ottawa winters ask a lot of our homes. Long cold spells, icy wind, and deep snow mean our heating systems work hard from late fall into spring. When the furnace never seems to stop, monthly bills climb quickly. That is where energy-efficient heating becomes so important for comfort, cost control, and the environment.   In practical terms, energy-efficient heating means getting more usable warmth from every unit of energy we pay for. It is about matching the right equipment to the home, designing the system thoughtfully, and setting it up so it runs smoothly all season. A well planned system should provide steady, quiet heat without hot and cold swings or unnecessary