Model Type R3F
steel double panel radiators of the lengths and in locations
as indicated, and of capacities, style and having
accessories as scheduled. The double heating panel radiation
shall be of one-piece all-welded steel construction,
consisting of a pair of flattened water tube panels welded
to headers at each end. Welded to the inside of each panel
shall be steel corrugated fins to increase the convective
output of the radiator. The fins shall start at no less than
3 from the end of the radiator, and shall have no less than
32 fins per foot. A third set of fins shall be added to the
backside of the radiator for maximum convective output. The
radiators shall include an integral heavy gauge (0.09
minimum) all-welded perforated top grille, which will cover
the top of all of the finned areas (for curved radiators
the grille is omitted).
The headers shall include all necessary inlet, outlet and
vent connections as required. Standard connection sizes are
½ NPT tapered thread for supply and return piping, and 1/8
for the vent connection. Internal baffling is provided where
required for proper water flow.
The radiant heating panels shall be available in lengths
from 2-0 to 29-6 in two inch even increments without the
need for splicing. The panel radiation shall be capable of
being mounted to typical stud wall construction without
additional blocking or strapping. Appropriate wall mounting
brackets shall be provided with the radiation.
The panel radiation shall be manufactured in the USA.
ALTERNATE: The double panel radiators (up to
four tubes tall) are to be provided with floor-mounted
pedestals (OR Cantilever Wall Brackets) in
lieu of the wall mounting brackets.
Pressure ratings for the radiation shall be as follows:
STANDARD: Working pressure-56 PSI maximum, Test Pressure-74
MEDIUM: Working pressure-85 PSI maximum, Test Pressure-110
HIGH: Working pressure-128 PSI maximum, Test Pressure 184
Panel radiation expansion shall not exceed 1/64 per foot of
radiation at 215ΊF. The installer shall provide adequate
expansion compensation for each radiator.
The panel radiation shall be cleaned and phosphatized in
preparation for the powder coat finish. The radiation is
then finish painted with a gloss powder coat finish, for a
total paint thickness of 2-3 mils (0.002 - 0.003). The
color shall be selected form the Runtals standard colors,
or optional colors shall be available at and additional
All Runtal radiators are covered by a 5-Year Limited
Subject to compliance with requirements, provide flat tube
panel radiation as manufactured by Runtal North America,
OPTIONAL ITEMS WHICH MAY BE ADDED TO THE
Ribbed pipe cover trims, finished to match the radiators
shall be provided with the radiation.
The radiation manufacturer shall provide combination shutoff
valve/union fitting of less than two inches in width for the
supply and return to each panel radiator, to be field
installed by others.
Runtal-Flex connectors shall be used where appropriate to
provide expansion compensation for the radiators.