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.

In general, it will take about 90 minutes to burn the creosote sweeping log by itself, allowing it to work its magic. This may be longer or shorter depending on the conditions of your chimney.

The primary disadvantage of a ventless fireplace is that it doesn’t have an exterior venting system. This means that the byproducts from combustion are emitted into your home, which raises some safety concerns. In addition, ventless gas fireplaces produce moisture as they burn—and if there’s no ventilation, you could end up with a mold problem.

If your oven is new, then it’s likely that the oven smoking is due to it being a new unit. In this case, you don’t need to worry about the oven smoking. However, if your oven is old, you can’t identify any burnt food or grease that could be behind the smoking, or you have concerns about the heating element, then you should hire an oven technician to inspect your unit.