Radiant gas heater, aluminised steel reflectors, induced burner, 36 kW heat input, natural gas consumption 3.4 m³/h, horizontal mounting height 5-11 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
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VSSLIE Linear models - aluminised steel reflectors, induced burner
VS15SLIE8 15 kW heat input, natural gas consumption 1.4 m³/h, horizontal mounting height 4-5 m, length 8 m, weight 53 kg, 2 year WARRANTY
VS15SLIE8
15 kW heat input, natural gas consumption 1.4 m³/h, horizontal mounting height 4-5 m, length 8 m, weight 53 kg, 2 year WARRANTY
VS25SLIE8 23.5 kW heat input, natural gas consumption 2.3 m³/h, horizontal mounting height 5-7 m, length 8 m, weight 53 kg, 2 year WARRANTY
VS25SLIE8
23.5 kW heat input, natural gas consumption 2.3 m³/h, horizontal mounting height 5-7 m, length 8 m, weight 53 kg, 2 year WARRANTY
VS35SLIE10-5 36 kW heat input, natural gas consumption 3.4 m³/h, horizontal mounting height 5-11 m, length 10.5 m, weight 103 kg, 2 year WARRANTY
VS35SLIE10-5
36 kW heat input, natural gas consumption 3.4 m³/h, horizontal mounting height 5-11 m, length 10.5 m, weight 103 kg, 2 year WARRANTY
VS40SLIE13-5 40 kW heat input, natural gas consumption 3.8 m³/h, horizontal mounting height 5-11 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS40SLIE13-5
40 kW heat input, natural gas consumption 3.8 m³/h, horizontal mounting height 5-11 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS45SLIE13-5 44 kW heat input, natural gas consumption 4.2 m³/h, horizontal mounting height 6-12 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS45SLIE13-5
44 kW heat input, natural gas consumption 4.2 m³/h, horizontal mounting height 6-12 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS50SLIE13-5 48 kW heat input, natural gas consumption 4.6 m³/h, horizontal mounting height 7-13 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS50SLIE13-5
48 kW heat input, natural gas consumption 4.6 m³/h, horizontal mounting height 7-13 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VSLIE Linear extended models - aluminised steel reflectors, induced burner
VS25LIE10-5 23.5 kW heat input, natural gas consumption 2.3 m³/h, horizontal mounting height 5-7 m, length 10.5 m, weight 72 kg, 2 year WARRANTY
VS25LIE10-5
23.5 kW heat input, natural gas consumption 2.3 m³/h, horizontal mounting height 5-7 m, length 10.5 m, weight 72 kg, 2 year WARRANTY
VS35LIE13-5 36 kW heat input, natural gas consumption 3.4 m³/h, horizontal mounting height 5-11 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS35LIE13-5
36 kW heat input, natural gas consumption 3.4 m³/h, horizontal mounting height 5-11 m, length 13.5 m, weight 126 kg, 2 year WARRANTY
VS40LIE16 40 kW heat input, natural gas consumption 3.8 m³/h, horizontal mounting height 5-11 m, length 16 m, weight 147 kg, 2 year WARRANTY
VS40LIE16
40 kW heat input, natural gas consumption 3.8 m³/h, horizontal mounting height 5-11 m, length 16 m, weight 147 kg, 2 year WARRANTY
VS45LIE16 44 kW heat input, natural gas consumption 4.2 m³/h, horizontal mounting height 6-12 m, length 16 m, weight 147 kg, 2 year WARRANTY
VS45LIE16
44 kW heat input, natural gas consumption 4.2 m³/h, horizontal mounting height 6-12 m, length 16 m, weight 147 kg, 2 year WARRANTY
VS50LIE16 50 kW heat input, natural gas consumption 4.8 m³/h, horizontal mounting height 7-13 m, length 16 m, weight 147 kg, 2 year WARRANTY
VS50LIE16
50 kW heat input, natural gas consumption 4.8 m³/h, horizontal mounting height 7-13 m, length 16 m, weight 147 kg, 2 year WARRANTY

VSLI / VSALI technical data

Model VS / VSA
15LI 20LI 25LI 30LI 35LI 40LI 45LI 50LI
Nominal gross heat input kW 15.0 19.5 23.5 29.5 36.0 40.0 44.0 50.0
Nominal gas rate per burner natural gas (G20) m3/h 1.4 1.9 2.3 2.8 3.4 3.8 4.2 4.8
Gas connection BSP/Rc 1/2"
Electrical supply   230V 1 phase 50Hz, max. 1 A
Exhaust flue – twin wall diameter mm 127
Flue gas temperature standard length °C 210 - 270
extended length °C 160 - 210
Dimensions standard length m 5.98 6.99 8.02 10.66 10.89 13.49 13.49 13.49
extended length m 8.02 10.66 10.66 12.65 13.49 / 16.09 16.09 16.09 16.09 / 18.59
width mm 315 470
height mm 390
Recommended mounting height range horizontal mounting m 4 - 5 5 - 7 5 - 7 5 - 9 5 - 11 5 - 11 6 - 12 7 - 13
inclined / wall mounted m 3.5 - 4.5 4 - 5 4 - 5 4 - 6 4 - 7 4 - 7 5 - 8 6 - 9
Weight standard length kg 43 49 53 72 103 126 126 126
extended length kg 53 72 72 84 126 / 147 147 147 147 / 166

VSLF / VSALF technical data

Model VS / VSA
15LF 20LF 25LF 30LF 35LF 40LF 45LF 50LF
Nominal gross heat input kW 13.8 19.5 23.5 29.5 36.5 40.0 45.0 50.0
Nominal gas rate per burner natural gas (G20) m3/h 1.3 1.9 2.3 2.8 3.5 3.8 4.3 4.8
Gas connection BSP/Rc 1/2"
Electrical supply   230V 1 phase 50Hz, max. 1 A
Exhaust flue – twin wall diameter mm 127
Flue gas temperature standard length °C 250 - 290
extended length °C 180 - 240
Dimensions standard length m 5.98 6.99 8.02 10.66 10.89 13.49 13.49 13.49
extended length m 8.02 10.66 10.66 12.65 13.49 / 16.09 16.09 16.09 16.09 / 18.59
width mm 315 470
height mm 390
Recommended mounting height range horizontal mounting m 4 - 5 5 - 7 5 - 7 5 - 9 5 - 11 5 - 11 6 - 12 7 - 13
inclined / wall mounted m 3.5 - 4.5 4 - 5 4 - 5 4 - 6 4 - 7 4 - 7 5 - 8 6 - 9
Weight standard length kg 43 49 53 72 103 126 126 126
extended length kg 53 72 72 84 126 / 147 147 147 147 / 166

Minimum clearance distances to combustible surfaces

Gas heaters VSLI and VSLF clearance distances to combustible surfaces

Model VS15LF VS20LF VS25LF VS30LF VS35LF VS40LF VS45LF VS50LF
VSA15LF VSA20LF VSA25LF VSA30LF VSA35LF VSA40LF VSA45LF VSA50LF
VS15LI VS20LI VS25LI VS30LI VS35LI VS40LI VS45LI VS50LI
VSA15LI VSA20LI VSA25LI VSA30LI VSA35LI VSA40LI VSA45LI VSA50LI
Above reflector (VSLF/VSLI natural gas models) A 150 150 150 150
Above reflector (all VSALF/VSALI and VSLF/VSLI LPG models) A1 280 280 280 280
Above burner B 500 500 500 500
To the sides C 750 750 750 750
Beneath tubes D 1500 1700 2100 2100
Horizontally from heater outlet unflued E 1200 1200 1200 1200
End of the heater to the wall F 500 500 500 500
Above heater outlet flued G 150 150 150 150
Above heater outlet unflued G1 500 500 500 500

Linear heater model evenly distributes radiated heat by the entire floor area below. Units available in four versions:

  • VSLF - blowing fan is mounted above the forced burner, the hot air is pushed forward the heater tubes to the flue pipe. This results in much more convenient and less expensive heater service and installation, no need to do additional wiring toward the fan. This model comes with a stainless steel reflectors and reflector end caps.
  • VSLI - exhaust fan is mounted at the end of the heater on the opposite side of the induced burner, the hot air is pulled via heater tubes toward the fan which connects to flue. This model maintenance and installation is not as convenient as VSLF, but in case of damaged heater tubes it's preventing gas combustion products from entering the premises. This model comes with a stainless steel reflectors and reflector end caps.
  • VSALF - same as VSLF, the only difference is that it's equipped with aluminized steel reflectors without reflector end caps, cheaper version.
  • VSALI - same as VSLI, the only difference is that it's equipped with aluminized steel reflectors without reflector end caps, cheaper version.

Introduction

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.

New advanced burner technology

  • New slim-line burner head provides a long evenly distributed flame that dramatically improves temperature distribution along the entire length of the heater, delivering a more even floor coverage
  • Combustion occurs entirely within the firing tube. Not only does this reduce the size and weight of the traditional burner control housing but it also helps to reduce noise levels (as quiet as 47 dB(A) 3m free field)
  • Choice of burner ratings from 14 to 50 kW
  • All units are CE approved
  • NOx emissions as low as 52ppm on certain models – 40% lower than standard radiant heater

ConstructionVision radiant heaters constructions

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).

Additional control at the touch of a button

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.

Radiant Heating

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.

Universal Application

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

  • Greater Comfort, “sandwiched” between a warm floor below and low intensity span above
  • Increased Efficiency, heat “work zone” not ceiling. Not increasing heat transfer by “scrubbing” building envelope with moving air
  • Faster Recovery when doors open/close, due to heat “reservoir” in the mass of the floor
  • Now Ambi-Rad Improves on a proven concept

Properties of radiant heat

  • Emitted by hot surfaces
  • Travels in straight lines
  • Passes through the air without heating it
  • Absorbed by cooler solid objects on which it falls

Applications

  • Aircraft hangars
  • Automotive workshops and showrooms
  • Factories
  • Retail outlets
  • Sports arenas and halls
  • Warehouses
  • Workshops

Optimum economy and fuel savings

  • The elimination of both distribution and standby losses coupled with high operational efficiencies at the point of use enable fuel savings of up to 65% compared with conventional heating systems.
  • Excellent radiant performance. More of the available heat generated is distributed to floor level thereby improving efficiency and reducing energy consumption.
Vision radiant gas fired heaters
Manuals 15 MB
Declarations of conformity 210 KB
Brochures 1.1 MB
EC certificate 2.5 MB
SmartCom controller
Manuals 2.9 MB
Brochures 1.1 MB