18. Installation - lining a chimney. If you plan to burn wood or peat in a closed stove we strongly recomend you install a low-mass flexible liner even if you have a brand new tiled chimney. The argument for lining is covered fully in the chimney section; here we deal solely with installation procedures. XXThe first essential is to specify the correct diameter of liner. You should be able to find this information in your stove handbook. Alternatively consult the manufacturer or your local stove shop. Do not assume that the liner diameter corresponds to the diameter of the flue-connector on your stove. It may not – particularly in the case of cookers. XXNext make sure your chimney will accomodate the liner! If the flue is dead straight you may be able to inspect it with a torch, but if there are bends or other obstructions you would be wise to run a test length of liner through it. A section one metre in length should be adequate. Nail a block of rounded wood into each end and secure with a length of strong cord so that if the test length jams you can pull it out the way it went in.