Electric Aerotherms (Air Duct Heaters with Fan-Ventilation System)

ELECTRIC AEROTHERMS & FAN-HEATERS for HVAC units
(Air Duct Heaters for HVAC units and Air Conditioning Units + Coupling Convey Ring + Fan-Ventilation System)

GENERAL CHARACTERISTICS

Upon customer demand, we complete our Air Duct-Heaters range with the supply of standard and non-standard fan-heater systems for HVAC units and Air-Conditioning Units / Air Handling Units, suitable for being installed into AHUs (Air Handling Units), that means Air Duct Heaters with enclosed with Ventilation-Fan Systems (Axial And Centrifugal Fan).
These units are installed onboard Air Heating Units (either with finned and non-finned heating elements) by means of a metal frame casings, named “Coupling convey ring”, in order to allow to the fan-system propeller to supply a homogeneous air-flow velocity crossing the air inlet of the electrical air heating unit (Electric Air Heating Unit / Duct Heater) at certain indispensible technical parameters, which we summarize as follows:

Supply Voltage (Volts)
Phases: Single-Phase or 3-Phase
Fan-Ventilation System Engine Power in KW required to produce a given air velocity, measured in meters per second (m/s), or air delivery(m3/h).
Air-Ventilation velocity (in RPM – ripeats per minute)
Pressure Drop (in Pascal o ml of water columns)
Diameter of the Fan-system propeller (in mm)

These fan-heating units are composed with a fan-system engine enclosed with propeller and a cylindric convey ring.

Our Electrical Fan-Heaters (Aerotherms and Air Channel Duct Heaters) can be equipped with industrial ventilation fan-systems, as per what below summarized:

Centrifugal Fan Systems
Axial Helical Fan Systems

The range of application of such Air Ventilation Fan-heaters / Aerotherms is incredibly wide, with air delivery in the range from 120 to 250.000 m³/h, air pressures from 5 to 5000 kgf/m², with ventilation fan engines with nominal power from 0,18 to 500 kW and with propeller diameter from 160 to 1.600 mm., up to a diameter of 2.000 mm. for the most exigent applications.

Besides, we can design and manufacture special versions of such air ventilation fan-heaters / Aerotherms suitably applied to high temperature applications, abrasive dusts, inflammable and/or dangerous gases, etc.), either for material type or for specific application/design needs, in order to suit any of our custumer needs.

CERTIFIED QUALITY PRODUCT

The entire range of our electric aerotherms / fan-heating units is sturdy and fully reliable; these are built with high indisputable experience italian leading manufacturers’ fan-system engines, whose production cycles are certified and subject to the strictest technical-dimensional checks and electric tests in compliance with our own standards set forth ISO 9001:2015 certified Corporate Quality System and in full compliance with the latest european and international rules in force.

The construction and the documentation supplied to each electro-ventilation system is in compliance to European Directive Machine 89/392/CE and all electro-ventilators we’ve been applying to our Air heating units are exclusively marked “CE”.

SOME TYPICAL APPLICATIONS:

The sectors of application of our electric HVAC fan-heaters and aerotherms equipped with electro-ventilator either with Radial/Centrifugal or Axial fan type are mainly designed for several applications in various industrial sectors; some of its typical uses and applications are as follows:

Air-Conditioning and Climatization Units Industry (Air HVAC and AHU plants and machineries)
Hot Chambers, Drying Ovens, Packing-Packaging machineries, Fume abatement plants, Air-drying plants
Coating Cabins and Painting plants, Pre-heating ovens, Autoclaves heating
Manufacturing industry, Wood machines, Glass surfaces treatment machines, Tannery industry, Paper mill industry, Building industry and Brickworks, Textile industry, Farm industry, etc.

“Main guide-lines for ventilation and aerolics”:

With the term “ventilator” it is intended to refer to a rotating machine composed with engine and propeller which transfers to the fluid (air flow) which crosses it a certain energy, in terms of full pressure. The proportional ratio between the maximum pressure whilst the outlet-flow and the suction/intake must never overtake the coefficient of 1.2, related to standard technical conditions of air ( ρ = 100.000 N/m² t = 16°C ).

The full power installed onboard an air electric heater (measured in kW) has to be calculated by using the following formula:

KW =	LM x (T.OUT – T.IN)
	2500

KW =	SCFM x (T.OUT – T.IN)
	2500

LM = Air Delivery (in L/min)

T.IN = Air Intake Temperature (°C) (normalmente pari a 20°C)

T.OUT = Air Outlet Temperature required (°C)

SCFM = Standard Cubic Feet per Minute = (Liters per min. / 28.3)

T.IN = Air Inlet Temperature (°F) (typically 70°F)

T.OUT = Required Air Outlet Temperature (°F)

The main figures which are typical of a fan-system are:

Air delivery: air flow measured in terms of volume or mass related to air conditions at the time of suction. Given a certain value of air delivery at the temperature “t”, then its value, in normal conditions, is calculated by mean of the following formula:

SOME EXAMPLES:

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Electric Aerotherms (Air Duct Heaters with Fan-Ventilation System)

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