Infiltrometry test

Cold air infiltration through exterior walls, windows, doors, electrical outlets, etc. greatly affect the energy efficiency of the building and affect occupant comfort. To identify air leaks or heat losses, the engineer makes a infiltrometry test using an infiltrometer.

This test allows the professional to measure the quantity of exterior air entering the building and to locate the points of air infiltration in the exterior envelope.


The infiltrometer is a device equipped with a fan, a speed regulator, a pressure gauge and calculation software to analyze the data. By operating the fan, the pressure inside the ibuilding gradually decreases to allow outside air to enter through openings or unsealed cracks.

So, while the fan is running, thebuilding expert did a tour of the building with a smoke pear and a infrared camera (thermography) to determine precisely where there are air leaks that need to be sealed. Caulking unwanted air leaks will increase comfort and reduce energy consumption.

Places conducive to air leaks

On the floors

  • Doors and windows, windows and compression joints, caulking, chassis and frames;
  • Electric sockets and switches;
  • At the junction between exterior walls and floors;
  • The registers and bricks of the hearths;
  • Around the ducts of plumbing fixtures.

In the attic

  • Around the plumbing columns and other pipes at the floor level;
  • Around wires or light fixtures that cross the floor;
  • Around air ducts coming from below;
  • At the meeting point between the ceiling and the partitions;
  • The access hatches to the attic;
  • Around the fireplace;
  • Along the adjoining walls;

In the basement

  • The junction between the wooden structure and the wall of foundations, more precisely at the level of the seat rail;
  • Surroundings of ducts, shutters and spinning through foundation walls;
  • Through doors and windows;
  • Through the floor drains.
infiltrometry test

Air tightness test