Sizing and positioning SunSwitch Quartz Halogen Heaters

This guide is based on the application of SunSwitch quartz halogen infra red heaters with Philips elements. Other infra red heaters (e.g. ceramic plaque heaters and quartz heaters) emit heat at different wavelengths or less efficiently, and so this guide is not applicable for these. Please contact us on 01424 883344 for further advice.

Positioning
In general, we recommend placement of quartz halogen heaters above head height, angled downwards at about 45 degrees. This ensures the infra red rays warm the side of the body. Ideally, heaters should be placed so that more than one side of the body is warmed at once. We do not recommend that quartz halogen heaters are angled straight down, because this can overheat the top of peoples' heads and yet they will still be cold:

Space heating
To avoid cold spots (unheated zones), heaters should be installed so their output overlaps. Unheated zones usually occur where the heaters installed have too low a power output for the area being heated, there are too few heaters, or they are too far apart. The key is to ensure the heaters selected have a throw which is greater than half the distance between the heaters:

Type of work
The amount of heat required will depend on the building and the type of work undertaken:

	Highly insulated	Poorly insulated	Light cladding
Sedentary work	100W/m2	130W/m2	175W/m2
Light work	85W/m2	100W/m2	125W/m2
Heavy work	70W/m2	85W/m2	115W/m2

Please note that the information provided above is purely for guidance. Results in reality will be affected by physical factors - the structure of the building and weather conditions, for example - and by subjective factors, such as an individual's personal idea of comfort. Additionally, the height at which heaters are mounted will affect the size and warmth of the zone being heated (the further away they are, the bigger the heated zone will be, but it will also be less warm).

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