The main task is the installation
of the vent stack, which is included with all units.
The vent kits included in the
shipping carton are sufficient for installation in most single
story buildings. If more is needed they are normally easy to find.
All vent pipes are thinwall PVC.
The drawings illustrate some of
the more common vent stack configurations for self-contained
models and central system installations:
- Electric units with 2"
stacks should have the minimum number of bends, should use 45 o
elbows where possible, and should not have bends totaling more
than 360 os.
- 3" SpaceSaver/Ecolet
Mobile vents and especially 4" Non-Electric vent stacks
should be installed as straight as possible. If 45 degree
elbows are needed in a 4" vent stack then a 12 Volt fan
should be included in the installation.
- Merging a Sun-Mar vent with
other existing vents risks interference and is not advised.
- The diffuser included with all
but mobile units is a simple but effective device originally
patented by Sun-Mar principals to aid updraft, avoid winter
freeze up, and protect the vent from downdraft and weather.
- As shown in the drawing they
should be installed 2-3 feet above the peak of the roof for
- Vent joints within the
bathroom should be siliconed, vent joints outside should be
glued with CPVC glue.