https://blogfreely.net/mouseli....tter39/dont-buy-into
What is Checked on ? Gas Safety Certificates are legally required. This is important for your tenants' safety and health, and to prolong the life of your appliances. Your engineer will examine the safety of your gas appliances and pipes. They will then issue the certificate. If an appliance is deemed to be immediately dangerous or At Risk, it must be replaced immediately. Ventilation Your engineer will examine the ventilation channels in every appliance as part of the gas safety inspec