|VSX Recuperative U-Tube models - aluminised steel reflectors, blown burner, more than 20% greater efficiency than standard units, natural gas only|
|Nominal gross heat input||kW||20.0||25.0||32.0||36.0||40.0||44.0||49.5|
|Nominal gas rate per burner||natural gas (G20)||m3/h||1.9||2.4||3.1||3.4||3.8||4.2||4.7|
|Electrical supply||230V 1 phase 50Hz, max. 1 A|
|Exhaust flue – twin wall diameter||mm||127|
|Flue gas temperature||°C||190 - 250|
|Recommended mounting height range||horizontal mounting||m||4.5 - 7||5 - 8||5.5 - 9||6 - 10||6.5 - 11||7 - 12||7.5 - 13|
|inclined / wall mounted||m||3.5 - 5||4 - 5||4 - 6||4.5 - 6.5||5 - 7||5.5 - 8||6 - 9|
|Above burner & heat exchanger assembly||B||500||500|
|To the sides||C||1300||1300|
|Horizontally from heat exchanger outlet unflued||E||1200||1200|
|End of the heater to the wall||F||700||700|
U tube heater model concentrates radiant heat to a certain area of the room and not the whole of its space.
Heater design, in particular the fact that the hot air blown into the flue is near the burner, allowed Nortek company to create a unique product - a gas fired radiant tube heater with heat exchanger for recuperation. Technology of forced burner used in Linear models contributed to this, blowing fan is mounted above the burner, the hot air is pushed forward the heater tubes toward the flue. Instead of a direct connection to a flue on heater back, a unique heat exchanger was created. Hot exhaust air flows through it and warms pulled into the burner clean air. Air flows has no direct contact so pulled air is suitable for combustion, it's not pre-polluted.
Combining all of these components Nortek designed VSX unit of the thermal efficiency of up to 90% and radiant up to 65% (~50% on standart units).
Renowned for its pioneering track record, Nortek, Europe’s leading supplier of radiant tube heating systems, has yet again raised the industry standard in terms of innovation and technical performance.
The range of high efficiency Vision radiant tube heaters delivers exceptional performance in terms of efficiency and the potential to reduce energy costs.
The foundation of this development is a high efficiency advanced burner.
Bolt in place brackets for safe secure reflector fixing.
Ideal in any application where a secure system is required, such as - wind exposure around overhead doors or hangar doors (walls).
All models are compatible with Nortek ‘SmartCom3’ control systems. SmartCom3 units incorporate a host of features such as self-learning optimised start-up to ensure increased comfort and energy savings.
Working in the same way as the sun, radiant heat warms all solid objects and surfaces in its path through electromagnetic waves. Being mounted overhead, Nortek radiant heaters produce infrared heat that is directed downwards to low level by a reflector.
Infrared energy passes inertly through the air, dissipating as heat upon contact with people and surfaces thus creating a comfortable, all-round radiant warmth at lower air temperature. This reduces wasteful heating of empty space and makes substantial energy savings over conventional boiler and air systems.
Radiant heating has traditionally been predominant in industrial and commercial buildings, especially where there are large, high bay areas or where there are a high number of air changes within the environment.
Vision has been developed with these markets in mind and with a view to making radiant heating truly competitive within new smaller industrial and commercial buildings.
Its application is universal including environments with high air change, frequently opened doors, or where there is a need for zonal heating in very large premises.
The highly efficient performance of Vision provides greatly reduced running costs and improved capital payback, setting new industry standards.
Benefits of radiant tube heating
Properties of radiant heat
Optimum economy and fuel savings
Units can be installed unflued or individually flued (including concentric flues to minimise building penetrations).
Fresh air can be ducted into the heat exchanger from outside the building to provide clean combustion air, required when there are contaminates in the atmosphere.
Burner ratings range between 20 and 50kW in 5kW increments. The new burner head located within the firing tube leg provides a very long flame with even heat distribution. NOx emissions are very low – as low as 52ppm on certain models.
Mounted adjacent to the burner housing. Significantly increases thermal efficiencies up to 90% and enhances radiant efficiency above 60%. (Patent P308150GB).
Burner controls are mounted within a chassis that incorporates hinged doors for ease of access for commissioning and maintenance.
CALCOAT® tubes – a high technology process that applies a tough, dense, highly emissive surface both inside and out that eliminates the need for painting. As a result CALCOAT® ensures a long lasting surface that will not rust or flake, protects welds and maintains the highest of emissivity factors throughout the entire life of the heater.
Stainless steel spiral turbulators optimise tube temperatures by ‘scrubbing’ the flue gases against the tube surface, maximising heat transfer and increasing radiant efficiency.
Standard radiant heater
AmbiRad Vision (VSX)
AmbiRad Vision improves temperature distribution along the entire length of the heater