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You should never block both the top and bottom of your chimney. Proper airflow is essential because the temperature inside the chimney will still fluctuate as your house warms and cools. Moisture can build up without ventilation, leading to dampness in your walls over time. Blocking the top prevents debris and animals from entering, but the chimney still needs air circulation to avoid condensation issues. Allowing the chimney to breathe maintains the health of your home and prevents long-term damage.

Wood fireplace inserts produce more heat without replacing the whole system. A fireplace installer can verify that you have a connector and chimney system to fit the wood-burning insert.

Gas fireplace inserts require less maintenance and are an efficient way to produce warmth. Some can also produce heat in the event of a power outage.

Electric fireplace inserts don't have a real open flame, so they produce flames that mimic a real fire surrounded by artificial logs with LED light. Many electric fireplace inserts produce heat from glowing elements while only using electricity.

Yes, if your gas fireplace has a flue, you typically need to open it when using the fireplace. Although gas fireplaces don’t produce the type of smoke and soot that wood-burning ones do, they still release combustion gasses like carbon monoxide. Opening the flue ensures these gasses safely exit your home through the chimney. Not all gas fireplaces need a chimney, however. Always check the manufacturer’s instructions for your specific gas fireplace model, as some newer models may have different ventilation requirements.

Sap, despite its stickiness, is primarily made of water and is responsible for wood being “green” when it’s first cut. Green wood doesn’t burn very easily and will snap and crackle a lot, not ideal for a fire pit or fireplace. That’s why it’s best to let fresh, sap-filled wood season or dry out for at least a season before you start burning.