Page 874 - 2018_IRC

APPENDIX D

d. OFF. Where required by the local building b. ON. Measure the CO in the firebox (log sets
code in earthquake prone locations, inspect installed in wood burning fireplaces or in the
that the water heater is secured to the wall vent (gas fireplace) after 5 minutes of main
studs in two locations (high and low) using burner operation. The CO should not exceed
appropriate metal strapping and bolts. threshold in Table D.6.
e. ON. Measure the CO in the vent after 5 min- (8) Gas Clothes Dryer
utes of main burner operation. The CO should a. OFF. Where installed in a closet, verify that a
not exceed threshold in Table D.6. source of make-up air is provided and inspect
(4) Cooking Appliances that any make-up air openings, louvers, and
ducts are free of blockage.
a. OFF. Inspect oven cavity and range-top
exhaust vent for blockage with aluminum foil b. OFF. Inspect for excess amounts of lint around
or other materials. the dryer and on dryer components. Inspect
that there is a lint trap properly installed and it
b. OFF. Inspect cook top to verify that it is free does not have holes or tears. Verify that it is in
from a build-up of grease. a clean condition.
c. ON. Measure the CO above each burner and at c. OFF. Inspect visible portions of the exhaust
the oven exhaust vents after 5 minutes of duct and connections for loose fittings and
burner operation. The CO should not exceed connections, blockage, and signs of corrosion.
threshold in Table D.6. Verify that the duct termination is not blocked
(5) Vented Room Heaters and that it terminates in an outdoor location.
Verify that only approved metal vent ducting
a. OFF. For built-in room heaters and wall fur-
naces, inspect that the burner compartment is material is installed (plastic and vinyl materials
free of lint and debris. are not approved for gas dryers).
d. ON. Verify mechanical components including
b. OFF. Inspect that furnishings and combustible drum and blower are operating properly.
building components are not blocking the
heater. e. ON. Operate the clothes dryer and verify that
exhaust system is intact and exhaust is exiting
a. ON. Measure the CO in the vent after 5 min- the termination.
utes of main burner operation. The CO should
not exceed threshold in Table D.6. f. ON. Measure the CO at the exhaust duct or ter-
mination after 5 minutes of main burner opera-
(6) Vent-Free (unvented) Heaters tion. The CO should not exceed threshold in
a. OFF. Verify that the heater input is not more Table D.6.
than 40,000 Btu input, but not more than TABLE D.6
10,000 Btu where installed in a bedroom, and CO THRESHOLDS
6,000 Btu where installed in a bathroom. Boilers (all categories) 400 ppm air free
b. OFF. Inspect the ceramic logs provided with Central Furnace (all categories) 400 ppm air free 2, 3
1
gas log type vent free heaters that they are Floor Furnace 400 ppm air free
properly located and aligned.
Gravity Furnace 400 ppm air free
c. OFF. Inspect the heater that it is free of excess
lint build-up and debris. Wall Furnace (BIV) 200 ppm air free
Wall Furnace (Direct Vent) 400 ppm air free
c. OFF. Verify that the oxygen depletion safety
shutoff system has not been altered or Vented Room Heater 200 ppm air free
bypassed. Vent-Free Room Heater 200 ppm air free
d. ON. Verify that the main burner shuts down Water Heater 200 ppm air free
within 3 minutes by extinguishing the pilot Oven/Broiler 225 ppm as measured
light. The test is meant to simulate the opera- Top Burner 25 ppm as measured (per burner)
tion of the oxygen depletion system (ODS).
Clothes Dryer 400 ppm air free
e. ON. Measure the CO after 5 minutes of main
burner operation. The CO should not exceed Refrigerator 25 ppm as measured
threshold in Table D.6. Gas Log (gas fireplace) 25 ppm as measured in vent
(7) Gas Log Sets and Gas Fireplaces Gas Log (installed in wood 400 ppm air free in firebox
burning fireplace)
a. OFF. For gas logs installed in wood burning
fireplaces equipped with a damper, verify that 1. Parts per million
the fireplace damper is in a fixed open posi- 2. Air free emission levels are based on a mathematical equation (involving
carbon monoxide and oxygen or carbon dioxide readings) to convert an
tion. actual diluted flue gas carbon monoxide testing sample to an undiluted air

2018 INTERNATIONAL RESIDENTIAL CODE ® 849
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