▶ To prevent the risk of flue material overheat the appliance's
flue temperature is sensed and is limited. The flue
temperature limit is depending on inlet water temperature.
▶ Residential models: Maximum flue temperature is limited
to 145 °F (63 °C).
4.6.1 Vent options
This appliance can be installed as direct vent or Category IV.
The Greentherm T9900 SE/i is approved with the following
Vent or air intake pipe
Pipe cement / primer
Approved vent materials
For specific questions concerning vent material,
specifications, usage or installation, please contact the
vent manufacturer directly.
Approved Vent Manufacturers;
Do not use cellular foam core pipe for exhaust.This material is
approved for intake only.
The vent connection for the appliance is secured with a clamp
on the appliance exhaust adapter. All other vent connections
must be glued, except PP and flex PP. Slide the vent pipe into
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
the exhaust adapter. The exhaust pipe must be properly
supported and must be pitched a minimum of a ¼ inch per foot
back to the appliance. This allows the condensate to drain
Maximum vent lengths and equivalent lengths per table 8
Thermoplastic vent pipe
must be certified to ULC
Air Intake pipe may be of any
material listed (left)