Install Instructions

Page 3 of 18
WARNING
It is understood that all appliances requiring inside combustion air must have sufficient supply of the air for proper
combustion of the fuel air mixture within the appliance. What may not be understood is this supply of air shall be free of
corrosive contaminants. Air mixture containing corrosive contaminants when under fire through the combustion process of
the appliance produces exhaust gases containing these corrosive contaminants. These contaminants are prevalent in the
condensate of these gases throughout the vent system and will eventually damage the vent material. Refer to Table 1 for
listing of products.
The supply air to the heating appliance shall be free of any contaminants. Heating appliances installed in areas where the
supply air is contaminated shall have clean combustion air piped directly to the unit.
PRODUCTS THAT WILL CONTAMINATE THE COMBUSTION AIR SUPPLY IN THE MECHANICAL ROOM
Salts – Sodium Chloride used in water softeners Adhesives, cements, glues used to fasten building products
Dirty air due to renovation / construction Solvents containing Hydrochloric acid / Muriatic acid
Chlorine based swimming pool chemicals Chlorinated waxes and/or cleaners
Chlorine type bleaches, cleaning solvents, laundry
detergents
Aerosol sprays containing Chloro-flourocarbons (CFC’s)
Fabric softeners used in clothes dryers Paint & varnish and remover solvents
Permanent wave hair product solutions Refrigerant leaks
Table 1 ** List is subject to change without notice.
With the above contaminants present, failure to remove these contaminants or to pipe combustion air
directly to the heating appliance can eventually lead to the deterioration of the venting material by way
of the contaminated condensate, resulting in severe personal injury, death or substantial property
damage.
SPECIAL STAINLESS STEEL VENTING
For use with Category II, III, & IV gas burning appliances
Contact Local Building or Fire Officials about Restrictions and Installation Inspections in your area as well as National codes: USA
-National Fuel Gas Code ANSI-Z223.1/NFPA 54, CANADA – CAN/CSA-B149.1
Natural gas and propane installation
code.
Please refer to appliance manufacturers' instructions to determine proper sizing and connection of venting system to appliance,
including maximum horizontal length, maximum height, and installation clearances (air spaces). The proper operation of the vent
system and appliance requires parts specified by Z-FLEX with no deletions or substitutions.
In order to validate a warranty installation Z-FLEX recommends that a professional with Special Gas Venting experience or a certified Gas
Ticket professional MUST
perform the installation.
These instructions are intended as a guide to assist a professional installer.
When the Z-VENT system is installed, the following should be observed:
1. A venting system that exits the structure through a sidewall or the like, shall terminate not less than 12 inches (254 mm)
above the ground or normal snowline. (Minimum Clearance to Vent Termination Illustrations).
2. The termination of a system shall be located above the snow line in geographical areas where snow accumulates. The
termination area should be kept clear of snow and ice at all times.
3. The vent shall not terminate less than 7 ft. (2.13 m) above a paved sidewalk or driveway.
4. The termination shall be 6 ft. (1.8 m) or more from the combustion air intake of any appliance.
5. The system shall terminate more than 3 ft. (.91m) from any other building opening, gas utility meter, service regulator or
the like.
Contaminants Notice