The short answer is yes, but the longer answer is more complex. Unless the fireplace is ventless by design, you’ll need some type of exhaust pipe system to safely send fumes and other harmful byproducts out of the house. Even then, ventless fireplaces are not always permitted because they do keep the byproducts inside of your house. Ventless fireplaces are safest when installed in spaces that are themselves well-ventilated, like large rooms with lots of windows.

Yes, a faulty or broken light switch can be a serious fire hazard. Malfunctioning switches, often due to loose connections, exposed wiring, or overheating, can cause sparking or arcing. If you hear a crackling, popping, or hissing sound when you use the switch, it indicates live electricity arcing inside, which is a significant hazard that can ignite nearby flammable materials. If you suspect your light switch is faulty, turn off the power to that circuit at the breaker and contact a qualified electrician to remedy the issue.

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.

Your smoke detector might be too high in some homes or circumstances to reach yourself. If you feel unsafe getting on a ladder to replace your hardwired smoke detector, call a licensed electrician or local handyman to knock this project off your to-do list. If you have a battery-operated smoke detector, your local fire department can change the batteries or help you replace the detector—just make sure you call the non-emergency number.

In any case, do not let this project go unresolved, as it could turn into a huge safety issue.