Make sure you don t install any co detector too close to any appliance that generates heat.
Carbon monoxide detector distance from furnace.
In small homes where 20 foot distance is not possible place the alarm as far away from fuel burning sources as possible.
How far should a carbon monoxide detector be placed from a furnace or boiler.
The main thing that you are trying to avoid here is false alarms.
Do not place the detector right next to or over a fireplace or flame producing appliance.
Homes with attached garages.
The detector may be placed on the ceiling.
Because carbon monoxide is slightly lighter than air and also because it may be found with warm rising air detectors should be placed on a wall about 5 feet above the floor.
Detector within 10 feet of the internal door to your garage.
In short you should place your carbon monoxide detector at least 15 feet away from your furnace and this same rule applies to all other combustion appliances.
Avoid kitchens garages and furnace rooms.
Keep units at least 20 feet 6 meters away from common sources of combustion particles.
Keep the area ventilated to prevent unwanted alarms.
You will need more than one detector.
If you have an enclosed garage directly attached t o the home then you should also place a.
Keep at least 12 feet 3 7 m distance from the furnace or boiler if otherwise not specified in the user manual.