Modulating gas fired unit heater - K | Robur

Continuous modulation for maximal comfort.
K Series heaters with variable air flow rate and modulated heat input, with output range from 17.7 to 92 kW.

The winning characteristics

• Modulation of heat output and ventilation according to ambient requirements.
• Flame modulation burner with complete gas/air pre-mixing. This specific burner has been manufactured to ensure constant, continuous and efficient modulation of heat output between 100% to 56%.
• High efficiency for greater energy savings: from 92% up to over 96% at maximum heat output.
• Axial fan with widened blades, for a greater air flow, controlled by a built-in electronic circuit board that regulates the fan speed for precise comfort control.
• Advanced microprocessor controls modulate the heat input and regulate the fan speed.
• Air intake and exhaust outlet diameter of just 80 mm, a feature that allows savings to be made also during installation.
• Digital chronothermostat supplied as standard, offers a series of important regulation and control functions, resulting in a more precise and economical use of the heating system.
• Reduced size and weight, for faster and safer installation.
• K Series heaters have a lower size/heat output ratio than other warm air heaters currently available on the market.

Ideal applications

Modulation of heat output and air ventilation means that the K heaters can be used efficiently in all industrial and commercial premises as:

• workshops and factories, including large ones;
• commercial buildings and showrooms;
• rooms that require heating and ventilation;
• laboratories and sports halls.

Comfort, energy saving and seasonal efficiency:
the winning features of the K Series heaters

Comfort without competitors

Supply of heating output and ventilation is in proportion to the requirements of indoor space. Modulation of heat output and air flow rate are controlled and managed by an electronic circuit board and a digital chronothermostat installed in the indoor area to be heated.
On the basis of the temperature set and the heating conditions of the area, the electronic system supplies the right amount of heat and provides exceptionally high efficiencies and improved comfort.
During operation at full capacity, therefore, the heater is particularly efficient, pleasant and quiet.
The graphic below shows this particular capacity to keep comfort comparing the indoor temperature of a room heated with an ON-OFF heater and with a K Series heater when the heat request is reduced.
Thanks to the heat and the fan modulation and to an electronic system with a digital chronothermostat, the temperature is kept almost constant.

Energy savings and seasonal efficiency

K Series heaters have been designed to provide high thermal efficiency under all operational range.
In fact, for most of the winter season, heat requirements are less than the maximum specified in the project and it is in these conditions that Robur gas fired unit heaters perform at their best.
Their efficiency, already a remarkable 92% at maximum heat output, rises by 4 percentage points to 96.2%.
Furthermore, the modulation allows the amounts of on and off to be reduced and therefore increasing the efficiency of the overall system.

Digital chronothermostat for regulation and control

The digital chronothermostat, supplied as standard, offers:

• programmable timer for three separate temperature levels (comfort, reduced or freeze protection);
• winter operation in three selectable modes (automatic,manual, anti-frost);
• summer operation (ventilation only) with manual selection of ventilation speed;
• operational and fault diagnostics, with warning signals and alarm reset.

In addition, if more than one heater is installed in the same indoor space, it is possible to centralize the operation of all heaters, thus keeping unchanged the functions provided by the supplied chronothermostat.