User's Manual
WARNING
The alarm only indicates the presence
of carbon monoxide gas at the sensor.
Carbon monoxide gas may be present in
other areas.
Individuals with certain medical problems should
consider using detection devices with lower COHb
alarming capabilities and consider warning
devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm.
SYMPTOMS OF CO POISONING
The following symptoms are related to CARBON
MONOXIDE POISONING and are to be discussed
with ALL members of the household:
• Mild Exposure: Slight headache, nausea,
vomiting, fatigue (often described as
‘Flu-like’ symptoms).
• Medium Exposure: Severe throbbing headache,
drowsiness, confusion, fast heart rate.
• Extreme Exposure: Unconsciousness,
convulsions, cardiorespiratory failure, death.
• Many cases of reported CARBON MONOXIDE
POISONING indicate that while victims are
aware they are not well, they become so
disoriented they are unable to save themselves
by either exiting the building or calling for
assistance. Young children and household
pets are typically the first affected.
CARBON MONOXIDE (CO) PRECAUTIONS
WHAT IS CARBON MONOXIDE?
Carbon Monoxide (CO) is an invisible, odorless,
tasteless gas produced when fuels do not burn
completely, or are exposed to heat (usually fire).
These fuels include: wood, coal, charcoal, oil
natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO
such as oil or gas burning furnaces, gas ovens,
wood-burning fireplaces, and charcoal grills. If
they are not properly maintained, are improperly
ventilated or malfunction, CO levels can rise
quickly. CO is a real danger now that homes are
more energy efcient. “Air-tight” homes with
added insulation, sealed windows, and other
weatherproong can “trap” CO inside.
Electrical appliances typically do not produce CO.
The Nest Protect CO sensor meets the alarm
response time requirements of the American Na-
tional Standard ANSI/UL 2034. Standard alarm
times are as follows:
• At 70 PPM, the unit must alarm within
60-240 minutes.
• At 150 PPM, the unit must alarm within
10-50 minutes.
• At 400PPM, the unit must alarm within
4 to 15 minutes.
WARNING
This carbon monoxide alarm is designed
to detect carbon monoxide from any source
of combustion. It is NOT designed to detect
any other gas.
• Near fresh air vents, ceiling fans, or in very
drafty areas. Drafts can blow smoke away
from a smoke alarm, preventing it from
reaching the sensor.
• In insect infested areas. Insects can
clog openings to the sensor and cause
unwanted alarms.
• Less than 12 inches (30.48 cm) away from
fluorescent lights. Electrical “noise” can
interfere with the sensor.
• In “dead air” spaces. “Dead air” spaces may
prevent smoke from reaching a smoke alarm.
WHERE NOT TO INSTALL YOUR CO ALARMS
• Keep carbon monoxide alarm at least 5 ft (1.5 m)
away from any cooking appliance including
stovetop, oven, microwave, etc.
• This alarm should not be installed in locations
where the normal ambient temperature is below
4.4°C (40°F) or exceeds 37.8°C (100°F).
EXAMPLES OF WHEN YOUR ALARM MAY
NOT BE EFFECTIVE
Your alarm may not be effective in protecting
against fire in certain cases:
• Smoking in bed
• Leaving children unsupervised
• Cleaning with ammable liquids, like gasoline
• When someone’s clothes have caught on re
• Fires where the smoke is prevented from
reaching the alarm due to a closed door or
other obstruction
• Incendiary res where the re grows so rapidly
that an occupant can’t get out, even with
alarms in proper locations
WHERE NOT TO INSTALL YOUR SMOKE ALARMS
For best performance, AVOID installing a smoke
alarm in these areas:
• Where combustion particles are produced.
Burning material creates combustion particles
which could cause your smoke alarm to go off
unnecessarily. Areas to avoid include poorly
ventilated kitchens, garages, boats, recreational
vehicles, and furnace rooms. Keep a smoke
alarm at least 20 feet (6 m) from from the source
of combustion particles (stove, furnace, water
heater, space heater) if possible. In areas where
a 20-foot (6 m) distance is not possible – in
mobile, or smaller homes, for example – it is
recommended a smoke alarm to be placed as far
from these fuel-burning sources as possible. The
placement recommendations are intended to
keep a smoke detector at a reasonable distance
from a fuel-burning source, reducing “unwanted”
alarms. Unwanted alarms can occur if a smoke
alarm is placed directly next to a fuel-burning
source. Ventilate these areas as much as possible.
• In air streams near kitchens. Air currents can
draw cooking smoke into the sensor of a smoke
alarm near the kitchen.
• In very damp, humid or steamy areas, or
directly near bathrooms with showers. Keep a
smoke alarm at least 10 feet (3 meters) away
from showers, saunas, dishwashers, etc.
• Where temperatures are regularly below 40˚F
(4˚C) or above 100˚ F (38˚C) including unheated
buildings, outdoor rooms, porches, or unfinished
attics or basements.
• In very dusty, dirty, or greasy areas. Do not install
a smoke alarm directly over the stove or range.
Clean a laundry room unit frequently to keep it
free of dust or lint.
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