This cab heater is for air-recirculation. The heated air is distributed throughout the cab by means of two adjustable air vents and the three air outlets. One or both knock out pads can easily be removed to connecta demister tube no.1518-1 by means of rubber elbow no.& nbsp; 1518-2A.TECHNICAL DATA:2 speed blower6.0 kW heating capacity at 100°C TD290 m³/h air flow65 dB(A) sound level <span id=”sceditor-end-marker” class=”sceditor-selection sceditor-ignore” style=”line-height: 0; display: none;”> </span><span id=”sceditor-start-marker” class=”sceditor-selection sceditor-ignore” style=”line-height: 0; display: none;”> </span>12 or 24 Volt42 W power consumption16 mm diameter water connections Copper / Brass radiator Zinc plated steel cabinet coated with black polyester enamel2.8 kg<br>