You're right to be concerned about proper placement, especially in a boiler room. While smoke and heat detector placement near beams is often well-defined in codes, CO detector placement is generally NOT dictated based on beam pockets.

Here's the breakdown and why

Key Differences & Why Beam Pockets Don't Matter as Much for CO:
Carbon Monoxide is Density-Neutral (Nearly)

Unlike smoke and heat, which are buoyant and tend to rise, carbon monoxide is very close in density to air. This means it disperses more evenly throughout the room, rather than stratifying at the ceiling.

CO Detectors Detect Accumulation

They're designed to detect the concentration of CO over time, not necessarily the first whiff of it.

Primary Concern: Breathing Zone

CO detectors should be placed where they can detect CO in the breathing zone of occupants.

General Guidelines for CO Detector Placement (Even in a Boiler Room)


Manufacturer's Instructions

This is ALWAYS your first point of reference. Different detectors have slightly different requirements.2.

Location



On each level of the home or building. Boiler room is a separate level. Outside of sleeping areas. (If the boiler room is near sleeping areas) Centrally located

Ideally, in the boiler room, choose a location that allows the CO to disperse and be detected quickly.

Away from obstructions

Don't place it behind furniture or curtains that could block airflow.

Near Fuel-Burning Appliances (but not right on top of them)

This is the boiler room, so that's the focus.3.

Height



Wall-Mounted

Generally recommended, typically 5 feet (1.5 meters) from the floor. This puts it in the breathing zone. Avoid dead air space at the ceiling or floor.

Ceiling-Mounted

Can be used but are generally less effective than wall-mounted detectors for CO. (If you must ceiling-mount because of other issues, follow the manufacturer's specific instructions).

Specific Considerations for a Boiler Room with Beams


Ignore the Beams for CO Placement (Mostly)

The beams don't significantly change the CO detection strategy. Focus on the general principles of location and height.2.

Focus on the Boiler

Consider where leaks are MOST likely to occur from the boiler (vents, connections, etc.). Place the CO detector in a location that would likely detect CO emanating from these areas, while still remaining within the height and central location recommendations. Do not place the detector directly above the boiler. Heat can damage the sensor, and any small amount of stratification could lead to false readings.3.

Airflow

Be aware of the room's airflow patterns. Is there forced air? Natural ventilation? Place the detector where the airflow will likely carry CO to it.4.

Consult Local Codes and Authorities Having Jurisdiction (AHJ)

While national codes provide guidelines, local codes may have specific requirements for boiler room CO detection. Contact your local building inspector or fire marshal.

In Summary

Forget about using the beam pockets for CO detection. Follow the general CO detector placement guidelines, taking into account the specific characteristics of your boiler room (boiler location, potential leak points, airflow). Prioritize wall-mounted detectors at breathing zone height and consult local codes.

Disclaimer: I am an AI chatbot and cannot provide professional advice. Always consult with qualified professionals for specific safety recommendations and code compliance. Flag for review