Planning

• One of the great things about direct-vent fireplaces installations is that although you can install a direct-vent system in a chimney, a chimney is not a requirement. Another advantage is that you can install your fireplace just about anywhere you have the necessary space for the unit and an accessible exterior wall. Depending on the product's required installation method and what you choose, you can be enjoying the warmth and comfort of a direct-vent fireplace in a matter of hours.
  
  Find out the local building codes for direct-vent fireplace installations. It is also a good idea to read the manufacturer's specifications for installing the product. Improperly installing the unit can void your warranty.
  
  If the direct-vent flue installation is a DIY project, read your homeowner's policy or speak to your insurance company to find out if you are covered if you perform the installation. Some insurance carriers will not pay on claims for damages resulting from a DIY project installed by an unlicensed person.
  
  

Installation Process

• Generally, use 7-inch-diameter pipe with a 4-inch inner exhaust pipe to run the fireplace flue to the opening. Exhaust the fireplace horizontally through an exterior wall, or vertically through the roof. Consider using a traditional fireplace that has been out commission; however, you may have to install a chimney liner to bring the older structure up to modern standards and building codes.
  
  Once you have determined the type of installation method, make a plan. This will help you visualize and clarify what you will require to complete the direct-vent flue installation as easily and quickly as possible. Also know the type of kit you'll need for the flue installation method you select.
  
  For horizontal connections, secure the direct-vent pipe to the port at the rear of the fireplace. When you buy the required kit for an outside wall installation, it usually includes a 24-inch vertical direct-vent flue pipe and an adjustable direct-vent pipe. The kit should also contain a 90-degree elbow, wall thimble collar and a horizontal vent cap. If you do not want the fireplace flue pipe visible in the interior living space, eliminate the vertical length and vent from the rear of the fireplace straight through the adjacent wall.
  
  If you run your direct-vent fireplace flue through the roof, you'll need to measure the run and purchase enough direct vent flue pipe. Most vertical runs are limited to 30 to 35 feet, so check your local code.