Residential blower door testing — $375 total ($200 deposit at booking; remaining $175 plus any travel on a follow-up invoice). Available Fri–Sat. Travel free within 20 miles of our Sumner office (16202 64th St E Ste 117); farther trips $1.75/mi round trip. Commercial testing needs a custom quote — call (253) 802-8738. Enter the job-site address when you book.
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Our family: Dow Engineering, Build Sherpas. Same office in Sumner.
WA Blower Door, a tradename of Dow Engineering PLLC · 16202 64th St E Ste 117, Sumner, WA 98390 · (253) 802-8738
Dow Engineering PLLC