A patient seated in the chair before a blood draw
In person

House Dust (Greer) Allergy (IgE)

IgE antibodies to a house dust extract, from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
Nothing to do ahead of time. Water is fine.
Results
3 to 5 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

This blood test measures IgE antibodies to a house dust extract (H1), a broad mix of indoor dust components rather than one mite. People often check it for year-round symptoms that are worse indoors. A result shows sensitization, not necessarily allergy, and not which part of the dust is involved.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

For adults with year-round sneezing, congestion, or itchy eyes that seem worse indoors, who want to check for sensitization to house dust before seeing an allergist.

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your result shows whether your blood has IgE to house dust components. It does not say which part of the dust is involved, so an allergist may look at mite or other indoor results too.

House dust extract-specific IgE (h1)
Specific IgE is an antibody the immune system can make against one allergen. This marker measures IgE that recognizes a house dust extract, a broad mix of indoor dust components rather than one mite. A level above the lab’s reference range shows sensitization.
Why it’s measured: Checks for IgE sensitization to house dust when symptoms last all year and are worse indoors.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting needed, and nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 3 to 5 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

Your result is reported as an IgE level in kU/L and compared with the lab’s reference range. A level above the range shows sensitization.

  • Your number next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

An allergist or other healthcare provider reads this result with your symptoms and home environment, and decides on next steps.

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

House dust is a mix of indoor components, and this test uses an extract of that mix rather than a single allergen. A dust mite test looks at IgE to one mite species.

Because the extract is a mix, a positive result does not show which part of the dust is involved. An allergist may read it with dust mite, pet, mold, or cockroach results.

The lab offers two house dust extracts, each prepared by a different maker. Both measure IgE to a mix of indoor dust components.

If you are not sure which one fits, the licensed clinician in your state who reviews your request, or an allergist, can help. A result from either one shows sensitization, not necessarily an allergy.

No. Sensitization means your body has made IgE to house dust. An allergy means that exposure causes symptoms. Many people are sensitized without having symptoms, so a positive result alone does not mean you are allergic.

A negative result does not clear an allergy either. An allergist or other healthcare provider reads your result with your history.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.