A Blower door: A blower door test is made up of a fan that mounts into the frame of an exterior door, small hoses, and a monometer is used to give CFM (Cubic Foot per Minute) readings. The fan depressurizes the home by sucking the air out, making the pressure inside lower. The outside air pressure then leaks in through all unsealed cracks and openings (air leakage). The auditor will then determine where these leaks are entering and then perform proper air sealing measures.

Air Sealing/Air Leackage

While running the blower door test, in many homes you will find there are cracks and openings in various places that bring in outside air, this is knows as air leakage. Cracks and openings are not ventilation. Ventilation is controlled air flow, air leakage is not. Outside air leaking in can bring is polluted, dusty air into the home, this can be a health and safety concern. Sealing up those air leaks will make any home more energy efficient and save money on energy costs.


Ventilation is very important when making a home energy efficient. It lets the proper amount of air needed to flow in and out regularly, and keeps it controlled. If an airtight home is not vented properly it can seal in moisture and/or air pollutants in the home. Both which are health and safety issues. This Problem can be found by running the blower door test, to find out if the house is too tight.

Combustion Appliance Testing: CAZ testing or Combustion Appliance Zone is a safety test with protocols that have been developed by BPI (Building Performance Institute). This safety test is essential to perform for the safety of the occupants of the home. The primary goal for this testing is to identify the combustion appliances in a home are drafting properly.
Our appliances such as our heaters and water heaters use fire when in use, therefore, the combusted gases need to vent to the outside. During the CAZ test we want to know if there is any back drafting or spillage of these gases from the appliances. We are also looking for flame roll out or evidence of it which creates a fire hazard.


Refrigerator Testing:Depending on the year, model and size, each refrigerator is supposed to use a certain amount of KWH (Kilowatt hours) per hour. This reading detects how much energy this refrigerator is using. This test is run for a minimum of 1 hour, after that hour the test gives a KWH reading for that unit. There is a chart that is used to determine if the refrigerator passes or fails based on the KWH reading and the KWH on the chart. We also use many database resources that will determine how much energy your refrigerator is using and how much you can save if you purchase a new one. .