Here are a few tips to prevent smoke from entering the room when starting a fire in a fireplace.
- Make sure to build the fire towards the back of the fireplace.
- Use firewood that is well-seasoned and dry.  Green wood, or wood that is wet, will create much more smoke.
- Try to prime the chimney before starting the fire.  You can use a rolled up piece of newspaper for this.  Making the air in the chimney warm before starting the wood on fire will prevent cold air in the chimney causing a backup of the smoke.
- Consider installing a smoke guard, or glass doors to reduce the size of the fireplace opening.
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