Kitchen gas stove venting

[Barry Adair]

FYI: Many gas range manufacturers allow delivery of brand new units emitting CO up to 800ppm

Carbon monoxide (CO) concentration in Parts Per Million or as percentage of air

Parts Per Million

% of CO in air

Inhalation time and toxic symptoms developed

0 - 1 ppm

.0001%

Normal background levels

9 ppm

.0009%

Maximum allowable concentration short term in living area (ASHRAE)

25 ppm

.0025%

Maximum exposure TWA (Time Weighted Average) (ACGIH) in the workplace.

50 ppm

.005%

Maximum exposure allowed (OSHA) in the workplace.

200 ppm

.02%

Mild headache, fatigue, nausea and dizziness.

400 ppm

.04%

Serious headache - other symptoms intensify.
Life threatening after 3 hours.

800 ppm

.08%

Dizziness, nausea and convulsions. Unconscious within 2 hours, dead within 2 to 3 hours.

1600 ppm

.16%

Headache, dizziness and nausea.
Death within 1 - 2 hours.

3200 ppm

.32%

Headache, dizziness and nausea.
Death within 1 hour.

6400 ppm

.64%

Headache, dizziness and nausea.
Death within 25 - 30 minutes.

12,800 ppm

1.28%

Death within 1 - 3 minutes.

Effects can vary significantly based on age, sex, weight and overall health.

[Donald S. Capalety, Jr.]

I just went through this on my own home. A vent to the exterior is required in ca if it has a pilot light. Not if it has electronic ignition.