Houses leak air due to pressure differences between the inside and outside, behaving much like a hot air balloon. The strongest pressure imbalances occur at the top and bottom of a structure rather than the middle. As warm air rises, it exits through unsealed openings near the roof, which simultaneously creates a vacuum that pulls cool air in through gaps near the foundation. We measure and pinpoint these air leaks using a specialized blower door test.
What Is a Blower Door Test?
A blower door test is a state-of-the-art diagnostic tool designed to measure your home’s overall airtightness and uncover hidden drafts.
By temporarily sealing a specialized, high-powered fan into an exterior doorway, we depressurize your home—lowering the indoor air pressure. This pressure difference draws outside air through every unsealed gap, crack, and opening in your building shell, making even the smallest invisible leaks easy to identify.
What to Expect During Your Test
- Setup & Inspection: We temporarily fit a flexible frame and calibrated fan panel into one of your exterior doorways and close all other windows and doors.
- Depressurization: The fan pulls indoor air out of the home, temporarily creating a pressure difference between the inside and outside.
- Leak Detection: Using advanced tools like thermal imaging cameras and smoke pencils, we visually trace and map out draft sources throughout your home.
- Actionable Results: You receive a detailed report showing your home’s total leakage rate alongside prioritized recommendations for air sealing.
Ready to Make Your Home More Comfortable?
Don’t let your energy dollars leak out through the walls. Schedule your comprehensive blower door test today and take the first step toward a warmer, cooler, and more efficient home.
Q: Why do I need one if my house feels comfortable?
A: Comfort hides energy waste. You might feel fine inside, but your system could be running double-duty pulling hot attic air through unsealed light fixtures and wall gaps. A test pinpoints exactly where conditioned air and money escape.
Q: Will it make a mess or blow soot everywhere?
A: Not when done right. Cold ashes and closed dampers keep soot inside the firebox. The pressure difference is mild—roughly equivalent to a 15 mph breeze against the outside walls.
Q: How does sealing air leaks help my HVAC system?
A: Stopping uncontrolled drafts reduces the thermal load on your equipment. Your furnace and air conditioner run shorter cycles, burn less energy, suffer less mechanical wear, and last years longer.
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