Yes, if you have a fireplace, furnace, or gas appliance in your Boulder home, you need carbon monoxide testing, at least once a year, or immediately if you smell gas, hear hissing, or feel dizzy near your chimney or heating system. Boulder’s thin air and older homes (especially in Pearl Street or downtown) make CO buildup more likely. A certified chimney sweep can test for leaks and blockages during your annual sweep, saving you a separate service call.
What is carbon monoxide (CO) testing, and why does it matter in Boulder?
Carbon monoxide testing checks for dangerous levels of CO, a colorless, odorless gas produced by incomplete combustion in fireplaces, furnaces, water heaters, or even stoves. In Boulder, where many homes (especially those built before the 1980s) still use older heating systems, CO risks are higher due to: - High-altitude air: Boulder’s elevation (5,430 feet) means combustion burns less efficiently, increasing CO output. - Older chimneys: Many homes near Pearl Street or the Flatirons have masonry chimneys that may not vent properly, trapping CO indoors. - Gas leaks: Even modern appliances can develop cracks or blockages over time.
The Chimney Safety Institute of America (CSIA) recommends testing CO levels annually if you use gas appliances or a fireplace. A professional chimney sweep can test for CO and inspect your chimney for blockages or cracks that might be causing leaks, saving you from needing a separate CO detector installation or repair visit.
How does a chimney sweep detect carbon monoxide in Boulder homes?
During a standard chimney sweep appointment, our crew uses a portable CO detector to measure levels inside your chimney and near your heating appliances. Here’s how it works in a Boulder home: 1. Visual inspection: We check for soot buildup, rust, or cracks in your chimney liner, common in older homes near Baseline Road or the University Hill area, since these can allow CO to seep back into your home. 2. CO testing: Using a calibrated meter, we test for CO at the chimney opening, furnace vents, and near the fireplace. Levels above 35 parts per million (ppm) require immediate action. 3. Ventilation check: We ensure your chimney draws properly (critical in Boulder’s windy conditions) and that no debris or animal nests are blocking airflow. 4. Appliance review: If your furnace or water heater is older (pre-1990s), we’ll recommend a separate CO detector for your home, as these units often need replacement every 5–7 years.
Pro tip: If your CO levels are high, we’ll also inspect your chimney cap, many Boulder homes lack one, letting rain, animals, or CO back into the flue. Installing a cap during your sweep can cut future CO risks by 40%.
When should I test for carbon monoxide in Boulder, not just once a year?
While annual testing is standard, Boulder’s climate and home types demand extra vigilance. Test immediately if you notice: - Symptoms: Headaches, nausea, or dizziness, especially after using your fireplace or furnace. These are early CO warning signs. - Smells: A faint sweet or metallic odor near your chimney or gas lines (common in older homes with unsealed joints). - Soot: Black, powdery residue on fireplace glass or walls, indicates incomplete combustion and high CO output. - Appliance issues: Your furnace or water heater hisses, flickers, or turns on/off erratically (a red flag in Boulder’s dry air, which stresses older systems). - After repairs: If you’ve had your chimney relined or a gas line repaired, schedule a CO test within 48 hours to ensure no leaks remain.
Seasonal note: Boulder’s fall and winter (October–March) see a spike in CO calls because homeowners crank up furnaces and fireplaces without prior inspections. Book your sweep before the first cold snap, our crew fills up fast in November.
Can a chimney sweep fix a carbon monoxide problem, or do I need a separate technician?
A certified chimney sweep can resolve many CO issues during your appointment, but some require a specialist. Here’s what we handle vs. what we refer out: | Issue | Can a Chimney Sweep Fix It? | Next Steps | |--------------------------|-----------------------------------|----------------------------------------| | Blocked chimney (creosote, debris) | Yes | Cleaning + CO retest | | Cracked chimney liner | No (refer to mason) | Schedule a Level 2 inspection here | | Faulty chimney cap | Yes (install new cap) | Upgrade to stainless steel for Boulder’s weather | | Gas appliance leak | No (refer to HVAC/plumber) | Emergency CO detector + professional repair | | Poor draft/ventilation | Yes (adjust damper, check cap) | May need a stainless steel liner for older homes |
Important: If our CO test shows levels above 50 ppm, we’ll stop work immediately and recommend a separate HVAC technician, especially for gas lines. Many Boulder homes near Canyon Boulevard have outdated piping that needs sealing or replacement. Ask us for a trusted local referral during your sweep.
What’s the price for a carbon monoxide check in Boulder, and should you do it?
CO testing is included with every chimney sweep appointment from Daniel Thompson Chimney Inc., so you’re not paying extra. However, costs vary based on your home’s setup: - Basic sweep + CO test: $120–$180 (includes visual inspection, CO meter check, and cleaning if needed). - Level 2 inspection + CO test: $250–$350 (for homes with signs of damage, like cracks or rust near Pearl Street’s historic homes). - Emergency CO test only: $75–$100 (if you suspect a leak but don’t need a full sweep).
Is it worth it? Absolutely. Consider this: - CO poisoning sends 50,000 Americans to the ER yearly USA.gov, and Boulder’s older housing stock puts you at higher risk. - One CO-related repair (e.g., relining a chimney) can cost $1,500–$3,000, far more than an annual sweep. - Insurance may cover it: Some Boulder homeowners’ policies reimburse annual chimney inspections. Ask your insurer before your appointment.
Local tip: If you’re in a rental property, Colorado law requires landlords to provide working CO detectors, but chimney-related CO leaks (from fireplaces or vents) are often missed. Landlords in Louisville or Lafayette often overlook this, ask for a CO test before signing a lease.
What if my Boulder home has no chimney but still has a furnace or gas stove?
Even without a chimney, gas appliances generate CO, and Boulder’s thin air makes combustion less efficient. Here’s what you need to know: - Furnaces and water heaters: These should be inspected annually by an HVAC technician for CO leaks. A chimney sweep cannot service these, but we’ll check if your venting system (often a PVC pipe) is cracked or blocked. - Gas stoves: Modern models are safer, but older stoves (common in pre-1990s Boulder homes) can leak CO if the burner ports are clogged. Never use a stove for heat, this is a top cause of CO poisoning. - CO detectors: Mandatory in Colorado for homes with fuel-burning appliances. Place detectors: - 15 feet from fuel-burning appliances (e.g., furnace, stove). - Outside bedrooms (critical for Boulder’s high-altitude sleep disruption risks). - On every level of your home.
Action step: If your home has no chimney but uses gas, combine: 1. An annual HVAC inspection (for furnace/water heater safety). 2. A chimney sweep visit (to check venting, even if it’s a small PVC pipe). 3. CO detector testing (press the test button monthly, many Boulder homeowners forget this step).
I rent in Boulder, does my landlord have to test for carbon monoxide?
Colorado law (CRS 38-12-101) requires landlords to: - Install CO detectors in rental units with fuel-burning appliances or attached garages. - Maintain detectors in working order (tested annually). - Disclose known CO risks (e.g., a faulty furnace) before you sign the lease.
But here’s the catch: Landlords often overlook chimney-related CO sources, like: - Fireplace vents (common in older rentals near the Boulder Canyon area). - Shared chimneys (if your unit connects to a neighbor’s fireplace). - Blocked chimney caps (letting CO back into the flue).
What you can do: 1. Ask for a CO test before moving in, many landlords won’t refuse if you cite the law. 2. Request a chimney inspection if your unit has a fireplace. Use our rental-friendly inspection service, we’ll document findings for your landlord. 3. Install your own CO detector ($20–$50) if the landlord hesitates. Place it 10 feet from the fireplace and outside the bedroom. 4. Report issues immediately if you smell gas or feel sick near the fireplace. Boulder’s fire department responds to CO leaks as emergencies Boulder, CO.
| Service | Cost Range | Best Time to Book | Who Should Do It |
|---|---|---|---|
| Annual chimney sweep + CO test | $120–$180 | Fall (Sept–Oct) or Spring (March–April) | Certified chimney sweep |
| Emergency CO test only | $75–$100 | Immediately if you suspect a leak | Chimney sweep or HVAC tech |
| Furnace/water heater CO inspection | $100–$200 | Before winter (Oct) or after repairs | Licensed HVAC technician |
| CO detector installation | $20–$50 | Anytime (mandatory in rentals) | Hardware store or electrician |
| Chimney relining (if CO leaks from cracks) | $1,500–$3,000 | After a Level 2 inspection reveals damage | Masonry specialist |
Frequently Asked Questions
My chimney sweep in Boulder didn’t mention carbon monoxide testing, should I ask for it?
Yes, always ask. Reputable chimney sweeps in Boulder include CO testing in every appointment, it’s a safety standard. If yours didn’t, it’s a red flag. Look for CSIA-certified crews like ours, who follow national guidelines. CO testing takes 5 minutes and could save your life. If they refuse, walk away and call someone else.
I feel dizzy after using my fireplace in my Pearl Street home, could it be carbon monoxide?
Almost certainly. Dizziness, headaches, or nausea after using a fireplace are classic CO poisoning symptoms, especially in older Boulder homes with unlined chimneys. Stop using the fireplace immediately, open windows, and test CO levels with a portable detector (available at hardware stores for $20). Then schedule a chimney sweep + CO test, your flue may be cracked or blocked.
My Boulder home has a wood stove, do I need extra carbon monoxide testing beyond the chimney sweep?
Absolutely. Wood stoves burn hotter and less efficiently than fireplaces, producing more CO, especially in Boulder’s dry air. Test CO levels every 6 months if you use your stove regularly. Also: - Burn only seasoned wood (wet wood creates more creosote and CO). - Crack a window slightly when using the stove to improve airflow. - Upgrade to a certified wood stove if yours is older than 10 years the EPA’s Burn Wise program.
How do I know if my Boulder chimney is leaking carbon monoxide instead of just needing a sweep?
Watch for these CO-specific signs (beyond normal chimney issues like soot): - Yellow or flickering flames (normal is blue). - Black, sticky creosote on the fireplace glass or walls (indicates poor combustion). - Condensation inside the chimney (sign of a draft problem trapping CO). - Animals nesting in the chimney (squirrels or birds can block airflow, increasing CO risks). If you see any of these, pause fireplace use and call a chimney sweep for a CO test + Level 2 inspection.