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24

WHERE NOT TO INSTALL YOUR CARBON 

MONOXIDE ALARMS

• Keep the carbon monoxide alarm at least 

3 m (10 ft) away from any cooking appliances, 

including the hob, oven, microwave, etc 

• This alarm should not be installed in locations 

where the temperature is below 5 °C (41 °F)

or above 45 °C (113 °F)

• In an enclosed space (for example, in a 

cupboard or behind a curtain)

• Where it can be obstructed (for example,  

by furniture)

• Directly above a sink

• Next to a door or window

• Next to an extractor fan

• Next to an air vent or other similar 

ventilation openings

• Where dirt and dust may block the sensor

• In a damp or humid location

EXAMPLES OF WHEN YOUR SMOKE 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 flammable liquids, like petrol 

• When someone’s clothing is on fire 

• Fires where the smoke is prevented from 

reaching the alarm due to a closed door or 

other obstruction 

CARBON MONOXIDE (CO) 

PRECAUTIONS

WHAT IS CARBON MONOXIDE?

Carbon Monoxide (CO) is an invisible, odourless, 

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 that are often sources 

of CO include oil or gas burning boilers, gas 

ovens, wood-burning fireplaces, and charcoal 

grills  If they are not properly maintained, are 

improperly ventilated or malfunction, CO levels 

can rise quickly  Additional sources include 

space and water heating, cooking, uncontrolled 

burning, tobacco smoking, internal combustion 

engine  CO is a real danger now that homes are 

more energy efficient  “Air-tight” homes with 

added insulation, sealed windows, and other 

weatherproofing can “trap” CO inside 
Electrical appliances typically do not produce CO  
Nest Protect will alarm:

• within 3 minutes at 300 ppm CO

• within 40 minutes at 100 ppm CO

• within 90 minutes at 50 ppm CO

Unit will not sound the alarm before 120 minutes 

of exposure at 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