"Providing full extraction system cleaning"

If ductwork cleaning is neglected and/or isn't cleaned on a regular basis, grease particles will quickly accumulate and contaminate the ductwork creating a serious risk of fire.  

                         

Insurance companies have stipulations regarding kitchen extraction systems. Failure to comply with these terms may invalidate any potential claim.

Take this example of a pub whose insurance company refused to pay out after fire damage. This was because the fire was caused by grease in the ductwork and a poorly-fitted ductwork system.