Onix Tubing Installation Manual

Watts Radiant: Onix Installation Manual page 31
Walls and Ceilings
Radiant floors produce a limited
amount of energy, usually around 45—
50 BTU/sq.ft. This limit is set by the
maximum floor surface temperature of
85¡F. Most of the time this will be
seen in areas like sunrooms. In cases
like this where auxiliary heat is
required, supplemental heat may be
added in the form of baseboards or fan
coils.
Or, supplemental heat may be added
by simply increasing the radiant sur-
face area.
Tubing can be installed in an interior
wall or ceiling to increase the radiant
surface area for a given room.
Walls and ceiling panels may also be
used in cases where installation pro-
hibits a radiant floor installation.
Installation requirements are the same
for both ceiling and walls as seen in
other frame applications.
If Watts Radiant s SubRay product is
to be used for the ceilings or walls,
consult the SubRay installation manual
for further details.
Caution: In all wall or ceiling appli-
cations, Onix must be installed so it
is in contact with the wall or ceiling.
Poultry Netting
Poultry Netting (chicken wire) can be
used to support the Onix in the wall
cavity. Only install a radiant system in
an interior wall. Exterior walls can
have potentially higher back and edge
losses and will increase the risk of
freezing in the case of a power failure.
Foil-faced insulation should be
installed first with the foil facing the
tubing. Poultry netting is then installed
over the joists with just enough slack
to allow the wire some movement
back into the wall cavity.
Onix is attached to the netting with the
use of cable ties and spaced either on
8" or 4" centers. It is important not to
allow the tubing to go higher than 4’
Wall Stud/
Ceiling Joist
Poultry
Netting
Onix
Supply/Return Manifolds
Interior Wall
Interior Wall
Onix (Cross Section)
Poultry Netting
Foil-Faced Batt Insulation
Wall Stud/
Ceiling Joist
Walls and Ceilings
Onix transitioning from one
joist/stud bay to the next
Typical wall or ceiling application using poultry netting (chicken wire).
Cross section of a wall or ceiling application using poultry netting (chicken wire).
16”o.c.
8”o.c.