Easy Radiant Works ED-40U, Operating Instructions Manual

Page: 19 / 44

19
VENTING REQUIREMENTS
VENTING TO THE OUTSIDE
In all cases, appliance venting must satisfy all requirements of the most recent versions
of the
National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane
Installation Code, CSA B149.1, and any other provisions made by local authorities
having relevant jurisdiction.
MATERIALS
All venting must be conventional venting material, with a minimum 26 gauge single-wall
metallic gas vent pipe of at least 4” (10 cm) diameter. An agency certified side wall vent
thimble or roof stack system approved for high temperature applications may also be
used for combustible wall/roof penetrations. Unless otherwise specified by the vent
manufacturer, minimum clearances to combustibles for un-insulated single wall vent
materials is 6” (15 cm).
Agency certified single wall, double wall, and insulated venting systems must meet or
exceed the above criteria. All manufactured vent material, adapters, thimbles and
terminations used must be certified for use with positive pressure gas fired appliances,
with a continuous temperature rating of a minimum of 450 F (232 C). Transition
between single wall, double wall or insulated vent materials as requirements dictate. In
cases where a manufactured venting system’s certified installation instructions
contravene this manual (e.g., vent lengths, vent clearances, number of elbows,
transitions, required terminations, etc.) defer to the specifications outlined in the venting
system’s manual.
In cases where suitability for a manufactured vent system is in
question, contact Easy Radiant Works, the vent manufacturer, or the local gas
authority for clarification.
VENT LENGTHS
Minimum Vent Lengths: A minimum total length of 36” (91 cm) of venting material is
required for this heater. A minimum vent length of 12” (30 cm) is required prior to any
vent elbow or tee in the exhaust venting.
Maximum Vent Lengths: The maximum allowable length of vent pipe is 30 ft (9.1m).
This length includes the combination of inlet air vent for combustion and exhaust
venting.
THE RADIANT TUBE IS NOT INCLUDED IN THE MEASUREMENT. For
every 90 degree bend in the system, 5 ft (1.5 m) must be deducted from the total
allowable vent length. Exceeding these allowable lengths may create condensation or
soot conditions and will void appliance certification and warranty.
If using single wall un-insulated vent material longer than 25 feet (7.6 m) it is
recommended that the venting after the 25’ (7.6 m) mark be of a insulated material, or
insulated with a suitable insulation material that is approved and specified by the
insulation manufacturer to withstand temperatures up to 450 F (232 C). Insulating single
wall venting in situations where excessive condensation occurs is also recommended.