Enjoying a warm, cozy fire requires a clean, safe fireplace. Here are some tips for keeping it that way: Make sure your smoke detectors and carbon monoxide detectors are operational and installed correctly. Install on every floor as well as inside and outside of bedrooms. Use a fireplace for a short-duration fire — no longer than five hours. Keep the glass open to allow air to be drawn up to cool the chimney, but keep the screen closed to prevent sparks from jumping onto the