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RoofVent® and TopVent® with heat pump, the energy-saving champions

August 6, 2018
Decentralised systems for ventilation, heating and cooling large halls have proved themselves in practical applications alongside centralised systems due to their excellent ability to adapt to the many and varied prevailing ventilation requirements. Hoval has been manufacturing decentralised climate...
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What is the significance of the CE marking and the declaration of incorporation for HVAC units? What you need to know.

February 16, 2018
The CE marking represents a confirmation from the manufacturer of a product, stating that – in accordance with EU Regulation 765/2008 – the product fulfils the fundamental requirements of the directives that apply to it. It is not a seal of quality.
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Comfort ventilation: just a hype or absolute necessity?

January 18, 2018
Hardly any new residential building can do without controlled ventilation: As a rule, new buildings are so well insulated for energy reasons that there is no spontaneous exchange of air. However, comfort ventilation also makes sense for existing houses.
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Who and what causes mildew, and how can you prevent it?

January 18, 2018
Mildew does not only occur in old walls. Mildew can also strike in new buildings. Where there is moisture, the furry fungus can sprout. Are the inhabitants to blame for not airing out the building enough? Architects who plan incorrectly? Or negligent craftsmen?
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Requirements of the ErP Directive on HVAC systems. What you need to know.

December 19, 2017
When one starts to get to grips with the requirements of the Ecodesign Directive with regard to HVAC systems, one encounters a plethora of regulations.
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Central or decentralised hall ventilation? A guide to help you decide

July 7, 2017
When is central hall ventilation the better choice, and when should decentralised ventilation be used? This neutral comparison by Dipl.-Ing. Jürgen Dorenburg looks at technical aspects, customer benefits and financial considerations.
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Calculating the supply air flow with the help of the load calculation – what you need to know.

May 29, 2017
The purpose of a hall ventilation system is to distribute supply air by means of a controlled and therefore calculable indoor air flow in order to dissipate heat loads and pollutant loads. There are various types of air guidance system which can perform this task. A design procedure is therefore required which makes it possible to assess the potential air guidance systems and select the best one for the requirements in question.
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Pollution in the working area – what you need to know.

March 14, 2017
Pollution in the working area depends on the air flow concept as well as the type, arrangement and magnitude of the heat loads; beyond that, it depends on the type and arrangement of the air outlets. For example, pollution levels up to 100% with mixed ventilation can be reduced to below 10% using alternative air flow patterns.
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Mixed and stratified ventilation in manufacturing halls – what you need to know.

January 11, 2017
The energy-efficient operation of hall ventilation is insured according to the current view by regulations in the Energy Saving Ordinance (EnEV) and the Energy-related Products Directive (ErP). They prescribe high requirements on the efficiency of room ventilation equipment. In fact, the actual energy saving starts much earlier, namely with the selection of the calculation method that is most suitable for the particular requirements on ventilation of a hall.
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Ventilation system for the production hall: naturally or mechanically?

November 9, 2016
Climate technology in a production hall has to be able to provide supply air and dissipate heat loads and/or pollutant loads. In principle, air flows can be transferred in two ways: either mechanically by ventilation and air-conditioning units or without machines by means of free (natural) ventilation using pressure differences. These pressure differences are created inside the hall by heat released during the production processes (negative pressure) and outside by wind pressure.
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