Inspection Training

How to Inspect the Combustion Air at the Heating System

While inspecting the heating system the inspector will want to check for proper combustion air supply in the room that has the heating system. This is something that is required when you have a gas appliance. Please review the entire procedure below.

NACHI SOP

International Standards of Practice for Performing a General Home Inspection

 

3.6. Plumbing

 

I. The inspector shall inspect:

N/A

 

II. The inspector shall describe:

N/A

 

III. The inspector shall report as in need of correction:

N/A

 

IV. The inspector is not required to:

R. Evaluate or determine the adequacy of combustion air.

 

Axium SOP Differences

Axium Requires: The inspector should check for the presence of combustion air in the room where the heating system is located.

 

Tools Needed

No tools required to inspect the Combustion Air Supply.

Procedure

  • While inspecting the heating system you will want to check for the presence of combustion air coming into the room. There is one picture required for this section and it should show the the combustion air supply.

Common Defects

  • The combustion air supply is either blocked or not present in the room where the heating system is located.

 

Common Mistakes

  • Not checking for the presence of combustion air.
  • Not checking to see if the combustion air is being blocked by a material.

 

Report / Software

IN


  • The combustion air supply for this appliance consisted of [word 1], which appeared to be adequate. Combustion air provides the oxygen needed for the safe and efficient operation of fuel burning appliances. An adequate supply of fresh air around all fuel burning appliances with open combustion apartments is vital for their safe operation. Years ago, the air could come from inside or outside the building, however, more recent standards prefer for combustion air to come from the outside only.
    • 1 Duct
    • 2 Ducts
    • Attic Vents
    • Crawlspace Vents

NI

  • N/A

NP

  • Not Present/Defect: The combustion air supply for this appliance [word 1]. A qualified contractor should evaluate and make necessary corrections according to current standards. Combustion air provides the oxygen needed for the safe and efficient operation of fuel burning appliances. An adequate supply of fresh air around all fuel burning appliances with open combustion apartments is vital  for their safe operation. Years ago, the air could come from inside or outside the building, however, more recent standards prefer for combustion air to come from the outside only.
    • Blocked
    • Not Present

RR

  • The combustion air supply for this appliance [word 1]. A qualified contractor should evaluate and make necessary corrections according to current standards. Combustion air provides the oxygen needed for the safe and efficient operation of fuel burning appliances. An adequate supply of fresh air around all fuel burning appliances with open combustion apartments is vital for their safe operation. Years ago, the air could come from inside or outside the building, however, more recent standards prefer for combustion air to come from the outside only.
    • Blocked
    • Not Present


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