Submittal Sheet

Technical Data Sheet
Z-VENT MODEL SVE IV SPECIAL GAS VENT SYSTEM
APPLICATION
Z-VENT is a factory built, engineered AL 29-4C special gas
venting system suitable for venting positive or negative
pressure residential and commercial gas fired heating
equipment. The maximum allowable continuous flue gas
temperature for Model SVE IV is 550° F(288°C ).
Model SVE IV Single Wall, 3 to 24in. dia.
For use with Category II, III and IV gas-burning appliances
only, where the maximum vent gas temperature at the
appliance outlet does not exceed 550°F. When the vent
system is installed in an unenclosed horizontal installation,
a minimum clearance to combustible construction of 3 in.
must be maintained. When the vent system is installed
in an unenclosed vertical installation, a minimum
clearance to combustible construction of 3 in. must be
maintained. When the vent system is installed in an
enclosed vertical installation, a minimum clearance to
combustible construction of 6 in. must be maintained. See
manufacturer’s installation instructions and appliance
manufacturer’s instructions for recommended clearances at
other vent temperatures.
Model SVE IV Double Wall, 3 to 24in. dia.
For use with Category II, III and IV gas burning appliances
only, where the maximum vent gas temperature at the
appliance outlet does not exceed 550°F. When the vent
system is installed in an unenclosed horizontal installation,
a minimum clearance to combustible construction of 2 in.
must be maintained. When the vent system is installed in
an unenclosed vertical installation, a minimum clearance
to combustible construction of 2in. must be maintained.
When the vent system is installed in an enclosed vertical
installation, a minimum clearance to combustible
construction of 6in. must be maintained. See manufacturer’s
installation instructions and appliance manufacturer’s
instructions for recommended clearances at other vent
temperatures.
CONSTRUCTION
The inner flue is manufactured from superferritic AL 29-4C
stainless steel. The AL 29-4C alloy shows excellent resistance
to chloride ion pitting, crevice corrosion and stress corrosion
cracking making it the ideal choice for battling the effects of
high temperature flue gases and corrosive condensate from
high efficiency gas heating equipment. A unique built-in
gasket system provides air and water tight connections with
no sealant required. Leakage tested to 2 1/2 times the UL
listed pressure rating of 8” water column.
The double wall system has a one inch air space between
the vent walls providing an insulation factor. This reduces
clearance to combustibles and helps to maintain stack
temperature, an important feature in the safe venting of
modern high efficiency heating equipment. The outer wall
is fabricated from type 304 stainless steel. Fusion welded
components provide superior fit, reduced turbulence and
flow resistance. Also eliminated are crevices and other spots
where condensation can collect and corrode the vent.
PATENTED SEALING SYSTEM
Z-VENT components are supplied with factory installed,
patented (US patent 6-523-865), self-sealing gaskets. The
gaskets special design along with precision engineered
close tolerance construction ensure an air and water tight
fit leakage tested to 2 ½ times the UL pressure rating of 8”
W.C.
APPROVAL
3 to 12in. UL tested and listed to UL1738/S636 Venting
Systems for Gas-Burning Appliances, Category II, III and IV.
File MH 18505
Email: [e-mail]
Website: www.z-flex.com
U.S.A.
20 Commerce Park North, Bedford,NH 03110-6911
Tel: [phone] Fax: [phone] Toll Free: 800.654.5600
CANADA
452 Attwell Drive, Etobicoke, ON M9W 5C3
Tel: [phone] Fax: [phone]
ver1 04/03