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Special ventilation equipment for ceiling installtion

The application

The air conditioner is a ventilating unit for recycling heat that has accumulated under the roof. With its small dimensions, the air conditioner can easily be installed under the roof of the hall.

The way it works

The air conditioner switches on automatically as soon as the temperature under the roof is 2 to 3°C higher than that in the working area. As soon as temperature uniformity is established, the air conditioner switches off, so that current consumption is reduced to a minimum. In the struggle against losses of heat, the air conditioner presents a simple, effective and inexpensive solution.

Our specialist personnel will gladly advise you and calculate your energy saving for you.

Energy optimization with heat recycling system

All installations with a room height of at least approx. 4.5 m can be optimized by the differential temperature-controlled heat recycling systems. These systems prevent the formation of layers of warm air under hall roofs, shorten heating-up times and ensure the optimized circulation of air in rooms.

How the air conditioner works
In accordance with the well known law of physics, warmer air rises because it is lither than the same volume of cooler air.
This fact causes difficulties for heating, particularly for heating high halls. The temperature difference per metre as hall height rises depends on many factors, e.g. the design of the construction, and natural and mechanically caused air movements.
Temperature measurement in a great many halls with different heights and various heating systems have resulted in average temperature increase of approx. 1.2°C per metre as hall height rises.
Thus, in a hall 10 m high, a temperature difference between floor and roof of approx. 12°C must be assumed. If, therefore, the desired room temperature in the work area is 18°C (measured 1.40 m above the floor), the absolute air temperature under the roof will be approx. 30°C.

The solution to this temperature stratification problem is an additional vertical circulation of the air in the room. The objective must be to transport down into the work area the warm air that accumulates under the hall roof because of the laws of physics. A sufficient degree of circulation in the hall can reduce or even prevent temperature stratification.


Measured temperature variations in halls with and without an air conditioner

The air conditioner forces the vertical movement of air in industrial halls. It is installed under the hall roof. Adequate vertical air movement is achieved when 2.5 times the room's volume is circulated per hour. Measurements have shown that there is virtually no temperature difference between floor and roof with this rate of circulation (as shown in Figure 1). The use of the air conditioner can thus prevent the accumulation of unwanted layers of warm air under the roof. This means reduced transmission under the roof and into the walls. So the air conditioner helps in your efforts to reduce operating costs, while at the same time giving the environment additional protection.

Installed air conditioners transport the accumulated layers of warm air by an additional vertical circulation of the air in the working area. A sufficient degree of circulation in the hall can reduce or even prevent temperature stratification.

For ceiling installation, housing made of aluminium-zinc alloy coated sheet steel, complete with protective grille on motor in accordance with DIN EN 294, and adjustable air-guidance louvre. Blow-off head quadrilateral vertical (swirl diffuser).

Single-stage alternating-current axial fan (5-stage with optional switch), die-cast, with maintenance-free external-rotor motor, 230 V, 50 Hz, IP Code 54. Electrical design in accordance with VDE, thermal class F. Full motor protection by incorporated thermal contacts, with externally attached terminal box.

Optionally with hard-wired ceiling temperature sensor and repair switch.