Thermolec Application &Technical Notes - Manual (Page 16)

THREE EASY STEPS
STEP 2 - (continued)
Exclusive Design advantage of the Thermolec Tubular heater construction
Thermolec Tubular elements can be removed through the control
box, which avoids the need to remove the heater from the duct and
thus reduces maintenance costs. However, precautions must be
taken in terms of clearance when installing the heater in order to
take advantage of this feature.
Please refer to SECTION 2 of this catalog for more detailed
considerations about open coil and tubular elements.