Also, if the battery is over five years old, take the time to have it tested and replaced if necessary. I love a nice warm wood fire. Keep your firewood covered but allow airflow around the wood. If the woodpile is sealed too well condensation can build up and the wood might be too wet. Clean your chimney every few years.
Creosote build-up can create a fire hazard.
Remember to keep your chimney's damper closed when not in use. Even oil-fired units need attention to maintain efficiency. In addition, an HVAC pro can help you protect your family from deadly carbon monoxide.