Instruction Manual

THREE
EASY STEPS
STEP 2 - (continued)
Size Limitations
Although there are pr
actically no limitations to the maximum siz
e of Thermolec custom-built heaters, all
CSA listed heaters m
ust comply to the f
ollowing minim
um dimensions:
Size Limitation Table
CSA listed custom heaters are av
ailable in virtually an
y KW rating.
Howe
ver,
Thermolec listing is
restr
icted to a maximum KW density of 22.5 KW per square foot of heated area f
or open coil and 13 KW
per square foot f
or tubular.
For a quick approximation of the maxim
um KW availab
le in a particular duct
size
, please use the following f
ormulas:
Modular Constr
uction for Air Handling Units
Thermolec heaters can be part of large
air handling units.
In this case, a heater
becomes a module of a bigger unit and is
designed to match the other components:
filter frames, fans, cooling coils, VAV
boxes, etc. Flanged units can be bolted
directly to adjacent sections or slip-in
models are inserted into a bigger unit.
Since there can be several special
conditions in such big units, the heater
has to be designed to accommodate
them. Special features can be installed
upon request: section with no heat,
pressure plates to equalize air flow, buffer
sections to space the heater
away from other components, etc.
Modular Heating Sections
Slip-in Type
Flanged Type
Slip-in Type Flanged Type
Open Coil Open Coil
Tubular
T
ubular
Minimum Duct Width
6”
5” 8”
7”
Dimension “W”
Minimum Duct Height
5”
4” 6”
6”
Dimension “H”
Open Coil T
ype
Maximum KW =
22.5 x width in inches x height in inches
SC or FC
144
T
ubular Type
Maximum KW =
13 x width in inches x height in inches
ST or FT 144