Take a look up your chimney flue. To do this Light up your chimney flue with a torch. Position yourself so you are able to look directly up your chimney flue (mind out for soot getting in your eyes).

Locate where you want your Chimney Sheep® will sit. We suggest the nearest/lowest part of your flue for ease of measuring and installation. If your flue is narrower further up, you can measure higher up.

Now you need to measure your chimney flue. Chimney flues vary in shape and different shapes have slightly different measuring requirements. For round flues, measure the diameter. For square or oblong flues, measure the depth and width. For unusual shaped flues, measure the largest depth and width dimensions of the aperture.

Finally, measure the height from where your Chimney Sheep® will sit to the opening of your flue. This is to ensure the safety tag on the handle is visible. If you’re pushing it more than 30cm up the chimney, you’ll need to buy more 15cm extension rods which are available to buy from our Chimney Sheep® accessories collection.

The measuring process is now complete! Put your measurements into our sizing chart and we'll tell you what size is most suitable for your flue.