To prevent carbon monoxide poisoning on a propane heater, make sure that your heater is suitable for indoor use. When you run the heater, it should always be in a well-ventilated area with proper air circulation. Installing carbon monoxide detectors on every level of your home is also essential. If you have any questions about using a heater indoors, contact a local heating and oil company for more information.

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.

The National Fire Protection Association (NFPA) says you can place smoke detectors on either the ceiling or the wall, depending on the setup of your room. Since smoke rises, the ceiling makes sense, but if you go with a wall mounting, the alarm should be installed high up—no less than 12 inches from the ceiling. 

To stop a smoke alarm from chirping, you must first determine what the device is alerting you to. If your battery is out or has been removed, simply change the battery and the chirping should stop. If it does not, try resetting the alarm, checking the breaker, or calling a professional to take a look.