The detector may be placed on the ceiling.
Carbon monoxide detector distance from furnace.
Do not place the detector right next to or over a fireplace or flame producing appliance.
If you have an enclosed garage directly attached t o the home then you should also place a.
Avoid kitchens garages and furnace rooms.
If however they are more than 30 feet apart.
Make sure you don t install any co detector too close to any appliance that generates heat.
How far should a carbon monoxide detector be placed from a furnace or boiler.
Keep at least 12 feet 3 7 m distance from the furnace or boiler if otherwise not specified in the user manual.
Keep the area ventilated to prevent unwanted alarms.
Homes with attached garages.
In small homes where 20 foot distance is not possible place the alarm as far away from fuel burning sources as possible.
The main thing that you are trying to avoid here is false alarms.
Keep units at least 20 feet 6 meters away from common sources of combustion particles.
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.
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.
You will need more than one detector.