The new energy-saver heating systems for the horticulture branch: Doll overhead-attached heaters type-series HR
novel type blow-out jalousie for a noticeably equal warmth-allocation in the greenhouse. Optionally available blow-out cone for application of a perforated warm-air film tube.
high energy prices are demanding efficient heating systems for horticulture. By the use of the patent annular gap recuperator these devices are having a German TÜV- approved substantially higher system-efficiency as conventional heating systems. As with this Doll-patent the radiant heat of the combustion chamber, which otherwise turns out to be lost heat, becomes absorbed by the recuperator and is being transformed again into useful heat.
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- very compact, light and aerodynamically efficient construction design.
- optionally for equipment with oil or gas blower burner.
- special-combustion chamber and recuperator made out of stainless-steel.
- low indoor pollutants and radiation radiation losses.
- high efficiency by the usage of the revolutionary, new and also economical combustor geometry.
- special-sickle ventilator for a smooth and silent run, with high air throughput.
- equal heat-allocation with no exhaust lines attached or with film tubes.
- applicable overhead-attached, compact construction layout.
- casing fully zinc-coated and additionally plastic-coated.
- exhaust nozzles on the side for simple connection with the exhaust fume line.
- very easy installation over 4 serially equipped attachment eyes.
- easy servicing and cleaning, easy to maintain by an unproblematic access to all parts and components.
- practical round form, versatile installation options.
- installation possible above the cultivation area, thereby no interference with the usable surface.
- novel, specially design blow-out jalousie for an homogeneous heat allocation and adjustable heat-recycling down to the floor.
- no generation of expensive stand-by heat as like warm-water heating system-operation.
- compact type of construction with backside ventilation for reduction of device-limited unheated zones in the building.
- system stand-by and system failure optically observable via signal lamps.
- selector switch for heating or aeration mode-
- delivery as a complete UNIT with burner, switching board and thermostat controllers, completely built up and wired.
- special-coating finish for minimal light absorption.
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DOLL HR-type series: All in all an outmost economic, cost-effective and powerful instant-heating system for the best climate for growth in greenhouse processes!
Technical specfications:
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HR 50
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HR 80 |
HR 100
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| Electrical connector: |
230 V / 50 HZ |
230 V / 50 HZ |
400 V / 50 HZ (230 V available)
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Heating power:
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up to 60 kW |
up to 80 kW |
up to 110 kW |
Air throughput:
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4400 m³/h |
5946 m³/h |
8176 m³/h |
Energy supply:
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heating oil
/compressed natural gas(CNG)
/liquefied petroleum gas(LPG)
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heating oil
/CNG
/LPG
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heating oil
/CNG
/LPG
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Exhaust-fume line diameter:
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150 mm |
200 mm |
200 mm |
Device diameter:
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780 mm |
780 mm |
780 mm |
Entire length:
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1110 mm |
1730 mm |
1760 mm |
Weight:
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80 kg |
110 kg |
135 kg |
