Before a blower test begins, the person testing must make sure of the following:
Close and lock all exterior doors and windows, with the exception of the opening where the blower is placed.
Open all interior doors.
Shut off heating / air conditioning and gas / oil fired water heating equipment
Close all fireplace, wood stove and chimney flu openings (dampers)
Empty ashes from wood burning stoves and fireplaces
Arrange the test around a time when fewer occupants are home.
Install the blower door unit in one of the exterior door openings and make sure that hose(s) are placed properly on the exterior of the building - away from the fan approx. 6', clear of any obstructions.