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Chimney inspection of a brick fireplace

Service · A1 Chimney & Roofing

Carbon Monoxide Testing

Carbon monoxide testing checks whether a fireplace or heating appliance is spilling carbon monoxide into the house. It is a test of that appliance and its vent. It is not a medical test, and it is not a promise about the whole house.

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CSIA certified
CSIA certifiedchimney sweeps
5.0 ★★★★★25,719 Google reviews
Licensed & insuredour own technicians

The work

What is carbon monoxide testing?

Carbon monoxide is a gas you cannot see or smell. A blocked flue, a damaged liner, a bad heat exchanger, or a fireplace used with a poor draft can send it into a room. The test measures the air at the appliance while it runs and looks at the venting that should be carrying the exhaust out.

If anyone feels sick, dizzy, or has a headache, or if an alarm is sounding, get everyone outside and call emergency services before you call A1. Do not stay inside to troubleshoot.

Why it matters

Why this work matters

A passed test on one day does not mean a damaged flue is fine forever. If the liner is cracked or the chimney is blocked, the repair still has to happen. The test tells you whether gas is spilling now.

A wood fireplace that smokes into the room needs the draft and the flue looked at, not only a meter reading.

What to expect

What to expect

The appliance is run, the readings are explained in plain language, and any vent problem is named. The price of the test is given before it starts. If anyone is sick, leave first.

A1 Chimney & Roofing is a nationwide team with its own licensed and insured technicians in 27 states. The price is explained before any work starts. Homeowners have left 25,719 Google reviews with a 5.0 rating.

Financing availableSpread larger repairs into monthly payments.
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How it works

Four steps, no surprises

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  1. STEP 01

    Book

    Online in a minute, or call the 24/7 line. We confirm your local A1 technician and a time window.

  2. STEP 02

    Inspect

    Your technician checks the chimney and the roof around it, and photographs what they find.

  3. STEP 03

    Price in writing

    You get the findings, the photos and a written price. Nothing starts until you say yes.

  4. STEP 04

    Fixed & cleaned

    Drop cloths down, debris hauled away, before-and-after photos sent to you.

Reviews

A1 Chimney is different. They truly care about your chimney and want to see you get the best use out of it.

SV
Sam V.Chimney service · ★★★★★ on Google

They relined my chimney and did a great job. The technician was respectful and left the work area clean.

CD
Charles D.Chimney relining · ★★★★★ on Google

Book online

Book this service

For a carbon monoxide test when no one is sick and no alarm is sounding, call (855) 8-CALL-A1. If people feel sick, get outside and call emergency services first.

  • Licensed & insured, our own technicians
  • Written price before any work
  • Before-and-after photos of the job

Prefer to talk? Call (855) 8-CALL-A1 — we pick up 24/7.

Book an Appointment Online

Schedule directly with our scheduling system.

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Water coming in? Smoke backing up?

Call the 24/7 line. Our team picks up day or night and sends a technician near you.

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