Installation Guidelines

Equipment sizing:

The choice of which unit(s) to install is dependent upon the heat loss value of the room that needs to be heated. This figure is calculated as the amount of heat (in Watts or BTUs) each room will lose at the near-coldest time period of the year. The result is the minimum amount of power that must be installed in the room so that the heating system will run efficiently and supply comfortable indoor temperatures for occupants. The heating system’s installed power capacity is then able to easily provide enough heat for the other 99% of the warmer days and nights of the year.

If an accurate heat loss calculation is unavailable, 40 Watts of heating power per cubic meter is a reliable level of installed wattage in the majority of cases.

Panel placement and installation:

Basic series panels are designed for ceiling installation and their recommended placement can be compared with installing room lighting. Basic panels output their full listed power and provide high surface temperatures of generally 145°C to 155°C. When installed, the glass heating surface of Basic panels should be at a distance of no more than 3 meters from the floor.

WIST NG series panels are designed for wall installation and should be placed on an external, heat-losing wall so that they are oriented toward the building’s interior. The lower edge of the panel should be 130cm to 150cm from the floor. WIST NG panels have a lower overall heat output of about 25% when compared with Basics due to their controlled electronic shutdown. This is a required protection feature that allows their surface temperatures to remain safe to the touch. Be sure to account for this lower output over time when installing your panel. A 1000 Watt WIST NG unit can be considered a 750 Watt output heater in practical terms.

FIRST Heating Systems panels are to be installed using only the supplied brackets / suspension hardware with which they are delivered.

Temperature control methods:

Radiant panels can provide the same perceptible level of comfort when thermostats are set at temperatures of about 2°C less than when using other heating methods. This causes a significant reduction of power consumption over time. Following a timed temperature schedule is also highly recommended to manage power use for when occupants are not present.


• Always follow heat loss calculations when the panels are to be used for primary heating.
• Install wall-mounted panels at positions facing the interior with wide view angle of the room.
• Install ceiling heat panels in a manner similar to light sources.
• Use a programmable thermostat with date/time scheduling and optimal start option.
• Place the thermostat on an inner wall in view of the panel heater.