13
Figure 41 – Rigid Guy Angle
Figure 425 – Maximum Freestanding Height
OPERATING PRECAUTIONS
A licensed or qualified vent sweep should be contacted to clean
the vent. Contact local building or fire officials about restrictions
and installation inspection in your area.
For tee caps, adequate clearance is required around clean‐outs to
assure accessibility for removal of caps and products accumulated
within the vent
It is recommended that exterior mounted venting systems located
in geographical areas which experience sustained low ambient
temperatures be enclosed to reduce or limit condensation,
creosote buildup and poor draft.
MAINTENANCE
Venting and Exhaust Systems
1.
After the installation of the vent or exhaust system,
ensure that the required clearances are maintained and
that the system continues to be supported properly.
2.
The venting system should be inspected if there is any
evidence of damage to the vent system, and at least
annually, for internal deposits, soundness and correct
clearances. Cleaning and repairs shall be as needed.
3.
Caulking on exterior portions of the vent, flashing, rain
collar, etc. should be inspected and repaired or replaced
as needed to prevent leakage.
4.
Painted portions of the vent shall be cleaned and
touched‐up or repainted as required to prevent
corrosion.
5.
Supports, guys, braces, etc. should be inspected at least
annually to make sure bolts are tight.
6.
For further information see NFPA 211, latest edition,
chapter titled Maintenance.