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.

If a storm or other natural disaster occurs in your area, you may not have immediate access to help. According to the U.S. Federal Emergency Management Agency, keep a disaster preparedness kit in your home with enough essentials to sustain your family for at least 72 hours. Put this in an easily accessible location to have it handy in case anything unthinkable happens.

Chimneys should either be sealed or waterproofed, which is different from sealing off—closing at both ends—a chimney. Waterproofing and sealing are both crucial steps to take to prevent water damage and the chimney leaking inside the house. While waterproofing is more comprehensive, both help safeguard your chimney, extending its life span and preventing expensive repairs. 

Bioethanol fireplaces are safe when users follow the instructions and maintain the fireplace. Ethanol is flammable, however, and should be kept away from flammable surfaces, children, and pets.