2.0201.1 Combustion Appliance Zone (CAZ) Testing

Topic: 
Combustion Safety
Subtopic: 
Combustion Safety General
Desired Outcome: 
Accurate information about appliance safe operation is gathered
TitleSpecification(s)Objective(s)
2.0201.1a
Assessment

Emergency problems (e.g., ambient gas levels greater than 10% Lower Explosion Limit (LEL), ambient CO CO Carbon monoxide levels that exceed 70 ppm) will be communicated clearly and immediately to the customer, the home shall be evacuated, and appropriate personnel (e.g.: HVAC HVAC Heating, ventilation, and air conditioning technician, utility, emergency services) shall be contacted. ;            

Significant problems (e.g., gas leak less than 10% LEL, ambient CO CO Carbon monoxide levels that exceed 35 ppm but less than 70 ppm) will be communicated clearly and immediately to the customer and appropriate solutions will be suggested 

Examine appliance for signs of damage, misuse, improper repairs, and lack of maintenance 
 

Ensure system does not have potentially fatal problems 

2.0201.1b
Fuel leak detection

Inspect and test for gas or oil leakage at connections of natural gas, propane piping, or oil systems

If leaks are found, immediate action will be taken to notify occupant to help ensure leaks are repaired

The report will specify repair for leaks and replacement for hazardous or damaged gas or oil connectors and pipes

Detect fuel gas leaks

Determine and report need for repair

2.0201.1c
Venting

For oil systems that require a draft regulator Draft regulator A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value. Source: National Fire Protection Association 54, 2012 , the presence and operability of it (that draft regulator Draft regulator A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value. Source: National Fire Protection Association 54, 2012 ) will be verified and tested

Combustion venting systems will be inspected for damage, leaks, disconnections, inadequate slope, and other safety hazards

Determine if a regulator is present and working

Determine whether vent system is in good condition and installed properly

2.0201.1d
Base pressure test

Baseline pressure for naturally drafting vented appliances will be measured in Combustion Appliance Zone with reference to outdoors

Measure pressure difference between combustion zone and the outside under natural conditions

2.0201.1e
Depressurization test

CAZ CAZ Combustion appliance zone depressurization testing will be administered for all atmospherically vented appliances located inside the pressure boundary.  

Depressurization test will include exhaust fans, interior door closure, or duct leakage, or a combination thereof; the test will be done to determine the largest negative pressure per BPI BPI Building Performance Institute, www.bpi.org Standard 1200.

Determine worst-case depressurization in combustion zone due mechanical system fans

TitleSpecification(s)Objective(s)
2.0201.1a
Assessment

Emergency problems (e.g., ambient gas levels greater than 10% Lower Explosion Limit (LEL), ambient CO CO Carbon monoxide levels that exceed 70 ppm) will be communicated clearly and immediately to the customer, the home shall be evacuated, and appropriate personnel (e.g.: HVAC HVAC Heating, ventilation, and air conditioning technician, utility, emergency services) shall be contacted. ;            

Significant problems (e.g., gas leak less than 10% LEL, ambient CO CO Carbon monoxide levels that exceed 35 ppm but less than 70 ppm) will be communicated clearly and immediately to the customer and appropriate solutions will be suggested 

Examine appliance for signs of damage, misuse, improper repairs, and lack of maintenance 
 

Ensure system does not have potentially fatal problems 

2.0201.1b
Fuel leak detection

Inspect and test for gas or oil leakage at connections of natural gas, propane piping, or oil systems

If leaks are found, immediate action will be taken to notify occupant to help ensure leaks are repaired

The report will specify repair for leaks and replacement for hazardous or damaged gas or oil connectors and pipes

Detect fuel gas leaks

Determine and report need for repair

2.0201.1c
Venting

For oil systems that require a draft regulator Draft regulator A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value. Source: National Fire Protection Association 54, 2012 , the presence and operability of it (that draft regulator Draft regulator A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value. Source: National Fire Protection Association 54, 2012 ) will be verified and tested

Combustion venting systems will be inspected for damage, leaks, disconnections, inadequate slope, and other safety hazards

Determine if a regulator is present and working

Determine whether vent system is in good condition and installed properly

2.0201.1d
Base pressure test

Baseline pressure for naturally drafting vented appliances will be measured in Combustion Appliance Zone with reference to outdoors

Measure pressure difference between combustion zone and the outside under natural conditions

2.0201.1e
Depressurization test

CAZ CAZ Combustion appliance zone depressurization testing will be administered for all atmospherically vented appliances located inside the pressure boundary.  

Depressurization test will include exhaust fans, interior door closure, or duct leakage, or a combination thereof; the test will be done to determine the largest negative pressure per BPI BPI Building Performance Institute, www.bpi.org Standard 1200.

Determine worst-case depressurization in combustion zone due mechanical system fans