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// CODE SNIPPET

D.2 Occupant and Inspector Safety

2015 Michigan Residential Code > D Recommended Procedure for Safety Inspection of an Existing Appliance Installation > D.2 Occupant and Inspector Safety
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Prior to entering a building, the inspector should have both a combustible gas detector (CGD) and CO detector turned on, calibrated, and operating. Immediately upon entering the building, a sample of the ambient atmosphere should be taken. Based on CGD and CO detector readings, the inspector should take the following actions:

  1. The CO detector indicates a carbon monoxide level of 70 ppm or greater1 The inspector should immediately notify the occupant of the need for themselves and any building occupant to evacuate; the inspector shall immediately evacuate and call 911.
  2. Where the CO detector indicates a reading between 30 ppm and 70 ppm1 The inspector should advise the occupant that high CO levels have been found and recommend that all possible sources of CO should be turned off immediately and windows and doors opened. Where it appears that the source of CO is a permanently installed appliance, advise the occupant to keep the appliance off and have the appliance serviced by a qualified servicing agent.
  3. Where CO detector indicates CO below 30 ppm1 the inspection can continue.
  4. The CGD indicates a combustible gas level of 20% LEL or greater. The inspector should immediately notify the occupant of the need for themselves and any building occupant to evacuate; the inspector shall immediately evacuate and call 911.
  5. The CGD indicates a combustible gas level below 20% LEL, the inspection can continue.


     If during the inspection process it is determined a condition exists that could result in unsafe appliance operation, shut off the appliance and advise the owner of the unsafe condition. Where a gas leak is found that could result in an unsafe condition, advise the owner of the unsafe condition and call the gas supplier to turn off the gas supply. The inspector should not continue a safety inspection on an operating appliance, venting system, and piping system until repairs have been made.

Related Code Sections


D.2 Recommended Procedure for Safety Inspection of an Existing Appliance Installation, Occupant and Inspector Safety
the occupant of the need for themselves and any building occupant to evacuate; the inspector shall immediately evacuate and call 911. Where the CO ...
2015 Michigan Residential Code > D Recommended Procedure for Safety Inspection of an Existing Appliance Installation > D.2 Occupant and Inspector Safety
D.1.3 Recommended Procedure for Safety Inspection of an Existing Appliance Installation, Inspection Procedure
The safety of the building occupant and inspector are to be determined as the first step as described in D.2. Only after the ambient environment ...
2015 Michigan Residential Code > D Recommended Procedure for Safety Inspection of an Existing Appliance Installation > D.1 General > D.1.3 Inspection Procedure
Section 103 Scope and Administration, Department of Building Safety
The Department of Building Safety is hereby created, and the official in charge thereof shall be known as the code official ...
2015 Michigan Rehabilitation Code > 1 Scope and Administration > 103 Department of Building Safety
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The Department of Building Safety is hereby created and the official in charge thereof shall be known as the building official ...
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1704.2.1 Special Inspections and Tests, Special Inspector Qualifications
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2015 Michigan Building Code > 17 Special Inspections and Tests > 1704 Special Inspections and Tests, Contractor Responsibility and Structural Observation > 1704.2 Special Inspections and Tests > 1704.2.1 Special Inspector Qualifications
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