While your forced heating system runs, it can pick up dirt, dust, hair, and other particles from inside your house. Changing your furnace filters regularly is key to preventing this debris from getting stuck in your ducts and swirling around your home. With some types of furnaces, there’s also the potential for carbon monoxide leaks. However, staying up-to-date with your HVAC inspections and installing carbon monoxide sensors can help mitigate this risk.

Your pilot light needs to be on whenever you’re using your furnace to heat your home. However, you might decide to turn it off during the summer months, when you don’t need heating. Doing this can save you a little bit of money on utility costs—just make sure you’re fine with relighting your pilot light (or hiring a professional to do it) when fall comes around and you’re ready to get cozy.

You should only use water to put out a fire in your fireplace in an emergency situation. Even then, it is better to use a fire extinguisher to put out a fire quickly. Make sure every room in your house that has a fireplace also has a fire extinguisher—and that everyone in your household knows how to use one.

No, it is not safe to use an outlet that sparked. A spark from an outlet could indicate a short circuit, loose or frayed wiring, or other serious damage. Continuing to use an outlet that sparks can increase the risk of electrical shock, electrical fires, and other hazards. It's important to turn off the power to the outlet at the circuit breaker if possible and avoid using the outlet until a licensed electrician has inspected and repaired it.