A Gas Safety Check Benfleet engineer will inspect the ventilation in both room, try combustion

https://trentonlnnl304.wordcanopy.com/posts/gas-safety-check-benfleet-for-busy-landlords-simplified-scheduling

A Gas Safety Check Benfleet engineer will verify the air flow in each room, experiment combustion, and check that flues are usually not blocked or incorrectly geared up.