These Bird guards and Vents below should only be used on redundant flue and will have to be removed before sweeping the chimney as these could cause a Chimney Fire. This service is available please see pricing/Bird guards.
Vents are NEVER to be used with a live solid fuel burning appliance as they are, as the name implies for venting a redundant flue. Even if a chimney is not being used there should still be a small airflow to ensure that damp does not build up causing further issues with the chimney integrity.
These Bird Guards are for a Gas fires only and should not to be use with solid fuel appliances as the mesh size is incorrect, mesh size need to be 1′ x 1′ for solid fuel and will have to be remove and replace with the correct mesh size Bird Guard before using the solid fuel fire.