Question? Just ask us!
Free Encyclopedia of Building & Environmental Inspection, Testing, Diagnosis, Repair
InspectAPedia ® Home
ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
ACCURACY vs PRECISION of MEASUREMENTS
AIR CLEANER PURIFIER TYPES
AIR LEAK DETECTION TOOLS
AIR POLLUTANTS, COMMON INDOOR
AIR QUALITY IMPROVEMENT STRATEGIES
ANIMAL or URINE ODOR SOURCE DETECTION
BACKDRAFTING HEATING EQUIPMENT
BIBLIOGAPHY for ENVIRONMENTAL HEALTH, MOLD, IAQ
BIOGAS PRODUCTION & USE
BLOWER DOORS & AIR INFILTRATION
BOOKSTORE - ENVIRONMENTAL
BUILDING SAFETY HAZARDS GUIDE
CARPETING & INDOOR AIR QUALITY
CHINESE DRYWALL HAZARDS
CHLORINE IN DRINKING WATER
COMBUSTION PRODUCTS & IAQ
COMBUSTION GASES & PARTICLE HAZARDS
CONDENSATION or SWEATING PIPES, TANKS
CPSC Indoor Air Pollution Book Online Copy
DRAFT MEASUREMENT, CHIMNEYS & FLUES
DUST SAMPLING PROCEDURE
EMERGENCY RESPONSE, IAQ, GAS, MOLD
ENVIRO-SCARE - PUBLIC FEAR CYCLES
ENDOCRINE DISRUPTERS at BUILDINGS
Fireplaces & Woodstove Contaminants
FLAME COLOR, BLUE vs YELLOW COMBUSTION
Formaldehyde Gas Hazard Reduction
GAS DETECTION INSTRUMENTS
GAS LP & NATURAL GAS SAFETY HAZARDS
GAS PRESSURES LP vs NATURAL GAS
HEATING OIL EXPOSURE HAZARDS, LIMITS
HOUSE DUST ANALYSIS
HOUSE DUST COMPONENTS
HUMIDITY CONTROL & TARGETS INDOORS
HYDROGEN SULFIDE GAS
Indoor Air Pollution Book Online CPSC
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INDOOR AIR QUALITY IMPROVEMENT GUIDE
LP & Natural Gas Pressures
GAS LP & NATURAL GAS SAFETY HAZARDS
MOLD ODORS, MUSTY SMELLS
MSDS MATERIAL SAFETY DATA SHEETS
MVOCs & MOLDY MUSTY ODORS
Museum Artifact Preservation
ODORS GASES SMELLS, DIAGNOSIS & CURE
ODORS IN WATER
OXYGEN - O2
PARTICLE SIZES & IAQ
PESTICIDE EXPOSURE HAZARDS
PLASTIC ODORS-SCREENS, SIDING
PLUMBING SYSTEM ODORS
PVC - VINYL BUILDING PRODUCTS
RADON HAZARD TESTS & MITIGATION
METHANE GAS HAZARDS
SEPTIC SYSTEM ODORS
SMELL PATCH TEST to Track Down Odors
SULPHUR & SEWER GAS SMELL SOURCES
UFFI UREA FORMALDEHYDE FOAM INSULATION
URETHANE FOAM Deterioration, Outgassing
VAPOR CONDENSATION & BUILDING SHEATHING
VENTILATION in BUILDINGS
VINYL SIDING or WINDOW PLASTIC ODORS
VOCs VOLATILE ORGANIC COMPOUNDS
WATER ODORS, CAUSE CURE
Carbon monoxide CO alarm sound-off troubleshooting:
this document discusses the causes of CO alarms going off - when a carbon monoxide alarm sounds you should assume there is dangerous carbon monoxide gas (CO) present. But other things might set off some alarm and not all of them are CO hazards.
Beware that the production of dangerous carbon monoxide gas in a building is usually not constant - it can start and stop. So even if someone tests and does not find CO gas present, especially if your CO alarm has been sounding, you can NOT assume that conditions are safe in the building, and further expert visual inspection of heating equipment, chimneys, etc. are in order.
For example, simply closing the door to a boiler room where gas fired equipment is operating can cause sudden production of CO gas if there is insufficient combustion air when the door is closed. Yet when someone opens the door to inspect the area, more combustion air is provided. CO production may stop.
Green links show where you are. © Copyright 2014 InspectApedia.com, All Rights Reserved.
Seek prompt advice from your doctor or health/safety experts if you have any reason to be concerned about exposure to toxic gases. Carbon monoxide poisoning can be fatal but exposure at lower limits can produce flu-like symptoms and headaches that are often mistaken for ordinary illness.
Carbon monoxide detector alarms may sound for a variety of reasons, but until you have diagnosed for sure why a particular alarm has sounded, you should assume that it has detected dangerous carbon monoxide indoors and you should follow our safety advice above.
Here are some causes of Carbon Monoxide Detector alarms sounding:
All of these conditions are dangerous. Follow our safety advice above
Safety Suggestions: Install Carbon Monoxide Detectors in addition to Smoke Detectors
Carbon monoxide detectors are inexpensive and readily available, both as a battery-operated unit and as a unit that plugs into an electrical outlet in the home.
No home should be without this safety protection, and homes with gas-fired equipment (natural gas or LP propane), space heaters, or other sources of risk should be extra cautious. Smoke detectors do not protect against carbon monoxide poisoning, and the opposite is also true. Carbon monoxide detectors do not warn of smoke or fire.
Continue reading at CO EXPOSURE LIMITS or select a topic from the More Reading links shown below.
Suggested citation for this web page
Green link shows where you are in this article series.
Frequently Asked Questions (FAQs)
I just bought a carbon monoxide detector about a month ago and when I came home today it was chirping and displayed LB for low battery. I was wondering if the alarm could of went off while I was at work and drained the battery and that's why it was chirping. - Jona 2/8/2012
Jona, chirping from a CO alarm means that it needs a new battery. The chirp is a signal, not a cause, of low battery problems.
why don't manufacturers of smoke alarms make them easier to read, instead of beige raised lettering on a beige background ? hard to replace battery when you cannot read directions - PoliceFan123 8/21/2012
Police: I agree that some embossed plastic instructions are hard to read. I suspect the underlying reason that these notes are not made in a different color combines an aesthetic opinion (for lettering on exposed surfaces) along with a wish to keep the product cost low as possible.
Here's a tip: before installing your next CO alarm or smoke detector, if you want to make its plastic embossed indicators, arrows, or instructions easier to read in the future, try just touching the raised lettering or symbols with a magic marker.
Use the "Click to Show or Hide FAQs" link just above to see recently-posted questions, comments, replies, try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
Search the InspectApedia website
HTML Comment Box is loading comments...
Technical Reviewers & References