What does a Certified Air Tightness Tester do, know and why does it matter.  Air Tightness certifications are provided in Canada by CRESNET – the Canadian equivalent of RESNET.  The purpose of CRESNET is to provide proper and effective energy audits and apply a proper HERS Index.

As I work closely with Home Energy systems and heating – knowing more about the whole building envelope is an important part of the job and how it can impact the solid fuel burning appliance and the occupants of the home.

If you are burning a wood stove, wood furnace, fireplace or insert – they all need air (oxygen) – the same as we do.  If they have no outdoor air supply they will attempt to use the air available to them in the home.  New fireplaces built to code will have external air supply – many new wood stoves, pellet stoves, etc. also have the provisions for external air supply to the fire.  The importance of this in a tight home can not be overlooked, not only is the oxygen the fire needs supplied – the potential of a downdraft is also eliminated.

Be smart; be safe!  Hire somebody certified to do the work!  Oh and yes I did get my Air Tightness Certification!