- Restore and weatherize original windows and doors, sealing the exterior envelope of the house. Visit here for more information on weatherizing original windows. Refrain from replacing windows with energy-efficient models; the result would adversely affect one of your cottage's most character-defining features. Nor is it worth it in the long run.
- Have the efficiency of your HVAC system checked and if necessary upgrade to a more efficient model. If you are especially ambitious, consider geothermal.
- Switch to LED light bulbs or CFL's if possible. Consider installing motion sensors.
- Add insulation strategically to the attic and/or basement to prevent heat from escaping rather than to the walls, which can harbor moisture and contribute to other problems.
- Invest in quality, heavy draperies that when closed help to prevent heat from escaping from single pane windows.
- Don't forget the basics. Close off rooms that are rarely used, turn off lights, unplug appliances that are rarely used. Monitor your energy use.
- If your cottage has an existing wood-burning stove, use it! If you know your historic house previously contained a wood-burning stove, investigate where it might have been located and consider installing a period-replica. Some homes can be heated entirely from wood-burning stoves.
- Consider installing solar panels on an inconspicuous place, perhaps on a rear or side elevation of your roof if your historic district ordinance allows for them.
- If you are still convinced that your original windows are contributing to the problem, carefully install low-E exterior storm windows.
- Make sure your appliances have an Energy Star rating.
By living in a historic home and virtually recycling all the materials, you are already saving a HUGE amount of embodied energy! By making some initial investments, you can save a lot more on your utility bills in the long run. And if you produce more energy that you consume (a possibility with solar panels), you may even end up with your utility company paying you!
Have a great day and stay warm!