At our new home, the furnace was real messed up. You had debris blocking airflow, forcing the oil furnace to work harder and run endlessly to reach thermostat settings. This uses more energy, raises energy bills, and really impacts comfort. There’s also the fear of the oil furnace overheating and killing you from carbon monoxide. Even at peak capacity, I doubted the oil furnace would be particularly energy efficient. I hired a licensed HVAC company specialist to inspect the oil furnace, including the duct system, and provide a recommendation. Fortunately, the air duct was in fantastic enough condition to keep. We were able to get by with having the ducts professionally cleaned and sealed. This process was fairly involved and fancy, but was handled hastily and with no destruction to the home. Unfortunately, the oil furnace was beyond saving. The company discovered a minor crack in the heat exchanger. Since the heat exchanger prevents the introduction of combustion byproducts, such as carbon monoxide, it’s harshly crucial. The cost of a brand new heat exchanger is more than a whole new oil furnace. Although the new oil furnace was a big expense, I felt better knowing we were relying on a safe, energy efficient piece of equipment. The new oil furnace keeps our home perfectly comfortable, even on the coldest of times.