Yes, you should seal and cap an unused chimney to protect it from damage. Sealing the structure helps prevent moisture damage, which can lead to issues like cracks, spalling, efflorescence, and damaged mortar joints. Capping the chimney is also crucial to prevent blockages, damage from invasive critters, and downdrafts, while still allowing for proper air ventilation to manage moisture. For the best results, consult a chimney professional to select the right type of chimney or flue cap for your home. It's also wise to continue with annual chimney inspections to maintain the structure's integrity.

Some Christmas lights are marked as being “UL Safety Certified” or Underwriters Laboratories Safety Certified. This lab is a trusted source for determining the safety standards of electrical products—you should make sure your Christmas lights have this label. Brush up on other electrical safety tips before installing any lighting features. 

Regular inspections, using dry wood, and installing chimney caps help maintain efficiency and safety.

Your local town or municipality’s fire code and other applicable ordinances will set out the requirements for installing and maintaining a private fire hydrant. These rules can vary from place to place, so it’s crucial to consult with your town’s fire or code enforcement departments before you install a private hydrant on any property you own. Alternatively, you can hire a professional fire service consultant to help you interpret local laws and ensure you’re fully compliant with those requirements.