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All installations and services must be performed by qualified service personnel.
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restriction, leakage, corrosion or other deficiencies which could cause
an unsafe condition.
3. Insofar as is practical, close all building doors and windows and all
doors between the space in which the appliances remaining connected
to the common venting system are located and other spaces of the
building.
4. Turn on clothes dryers and any appliance not connected to the
common venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan.
5. Close fireplace dampers.
6. Follow the lighting instructions. Place the appliance being inspected in
operation. Adjust thermostat so appliance will operate continuously.
7. Test draft hood equipped appliances for spillage of flue gases at the
draft hood relief opening after 5 minutes of main burner operation. Use
the flame of a match or use a draft gauge.
8. If the improper venting is observed on any of the appliances during the
above testing, the common vent system must be corrected. Follow the
steps outlined in the National Fuel Gas Code, NFPA 54/ANSI Z223.1 -
2002 or the latest edition thereof, to resize the vent system to
approach the minimum size using the appropriate tables in the
appendix of the Code.
9. Return doors, windows, exhaust fans, fireplace dampers and the
remaining appliances to their previous conditions of use after
determining that each appliance remaining connected to the common
venting system is venting properly when tested as outlined above and
the vent system is properly sized.
NOTICE: Common vent sizing of two Category I appliances may be done as
referenced in the National Fuel Gas Code, NFPA 54/ANSI Z223.1 - 2002 or the
latest edition thereof.
3. Condensing in the Chimney
Due to the improved designs, resulting in increasing thermal efficiencies of our
furnaces, more heat is being placed into the home instead of up the chimney.
This means the stack temperature will be lowered, which may result in