As a Home owner or Landlord, you're responsible for the safety of your familey or tenants, therefore you should ensure all of the gas boilers in your properties are safe to use, works correctly and are safe guarded against the dangers of Carbon monoxide.                                                 

By having an Annual Boiler check Carried out you can ensure the above as well as ensuring the boiler efficiency is checked and maintained.You can also ensure any standard faults are pick up on. If any faults are found, rectificational advise can be given and by doing this you will ensuring the Safety of your Familey and tenants.