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4. Coverage for Spot Heating
Applications
The area heated by a Quartz Halogen Heater depends on the height and the angle at
which the heater is mounted.
For 30° Heater Mounting Angle:
Area Covered = (Height)² x 2.66
Average Width of Beam = Height x 2.0
Throw of Beam = Height x 1.33
For 45° Heater Mounting Angle:
Area Covered = (Height)² x 5.72
Average Width of Beam = Height x 2.2
Throw of Beam = Height x 2.6
*Note:
Area covered, width and throw of beam are
measured at oor level.
The table below indicated throw and spread
measured 1 metre above oor level which may
be a more appropriate measurement for some
applications.
The following tables show the recommended mounting heights for three typical average
intensity requirements:
Average
Radiant
Intensity
on Heated
Area
(W/m²)
QXD1500 QXD3000 QXD4500
Height
(m)
Throw
(m)
Spread
(m)
Height
(m)
Throw
(m)
Spread
(m)
Height
(m)
Throw
(m)
Spread
(m)
Angled 30° from vertical
150 2.9 2.5 3.8 3.7 3.6 5.4 4.4 4.4 6.7
200 2.7 2.2 3.3 3.4 3.1 4.7 3.9 3.8 5.8
250 2.5 2.0 3.0 3.1 2.8 4.2 3.6 3.4 5.2
Angled 45° from vertical
150 2.3 3.4 2.9 2.9 4.9 4.2 3.3 5.6 5.0
200 2.1* 2.9 2.4 2.6* 4.1 3.5 3.0* 5.2 4.4
Note
1. Intensity is average intensity in W/m² based on Wattage of heater and area covered
and measured on a horizontal plane 1m above the oor level.
2. Heater mounting heights are in metres and are above oor level. Those marked ‘*’ are
minimum mounting heights for the particular heater model.
3. Throw and spread gures are in metres.
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