What is a blower-door test, and why would I want one?
A blower-door test measures how much air leaks through your home's envelope. A calibrated fan installed in an exterior door depressurizes the house to 50 pascals, and a flow meter reports the resulting airflow in CFM50 (cubic feet per minute at 50 pascals) or ACH50 (air changes per hour). The number tells you whether your home is tight, average, or leaky. Tight homes hold heat in winter and keep smoke and pollen out in summer. Leaky homes waste 20 to 40% of the energy you pay for heating and cooling. A blower-door test is the only way to know which one you have.
When does it make sense to do home performance testing?
Three common cases. First, before a heat pump or major HVAC replacement: the Manual J load calculation is more accurate when actual envelope leakage is known. Second, when comfort problems persist: drafts, rooms that never feel right, high bills. Third, when planning energy upgrades: insulation, air sealing, window replacement. The test surfaces the actual problem so you spend on the right fix instead of guessing.
What does a duct-leakage test reveal?
A duct blaster pressurizes the duct system to 25 pascals and measures the leakage rate in CFM25. Two numbers are reported: total leakage (how much air leaks out of the ducts at all) and leakage to outside (how much escapes the conditioned envelope into the attic, crawlspace, or outdoors). Most older Albany-area duct systems leak 20 to 35% of conditioned air, which is heating or cooling you paid for, going to unconditioned space. Sealing the ductwork is often the single highest-ROI energy upgrade available.
What is infrared thermal imaging used for?
An infrared camera shows surface temperature differences across walls, ceilings, windows, and other building components. With the home depressurized (during a blower-door test) or under thermal stress (a cold winter morning), the camera reveals where insulation is missing or compressed, where air leakage paths exist, and where thermal bridges (studs, joists, framing) are letting heat through. The image makes invisible problems obvious.
How much does home performance testing cost?
Tru72 offers home performance testing as a standalone diagnostic service. Pricing varies with scope: a focused blower-door + duct-leakage test is most common; full audits adding infrared imaging and a written report cost more. Energy Trust of Oregon may subsidize testing as part of qualifying programs for some homeowners. Call (541) 926-2321 for current pricing and a scope walkthrough.
Will this qualify me for any rebates?
Possibly. Some Energy Trust of Oregon programs require pre and post air-sealing or duct-sealing testing to qualify for the associated rebates. Federal energy-efficient home improvement tax credits also require qualified audits in certain cases. Tru72 documents test results in the format required by the relevant program when you tell us up front which program you're pursuing.
How long does the testing take?
A standard blower-door + duct-leakage test is about 90 minutes to 2 hours. Adding infrared imaging brings it to 2.5 to 3 hours, depending on home size. A full audit with a written report typically completes within the same visit; the report follows in 2 to 3 business days.
Does Tru72 also do the air-sealing and duct-sealing work after testing?
Tru72 performs duct sealing directly (Aeroseal in-duct sealing for accessible duct runs, manual sealing where access is available). For whole-home envelope sealing (attic insulation, knee walls, basement and crawl space sealing), we recommend specialist envelope contractors and coordinate the work so test-out results can be measured.