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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Does your heating need some care and attention?

April 3, 2018
Winter is coming to an end, the days are getting longer and warmer, and your heating is on less – now is the perfect time for a service. A regular service reduces your energy consumption and ensures that your heating will keep you nice and warm again next winter without problems.
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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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How can hotels and hospitals reduce their power and heating costs?

November 13, 2017
Hotels, hospitals and nursing homes consume huge amounts of energy. Programmes are used to keep consumption under control, and energy efficiency is the top priority when it comes to investment decisions.
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Busting the myths surrounding heat pumps

October 23, 2017
Heat pumps are more in demand than ever before: they supply heat efficiently and are environmentally friendly. Nevertheless, the more popular they become, the more quickly myths spread concerning their characteristics and operation. In this article, we’re going to straighten things up.
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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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What is BIM? - advantages of BIM in the work of a HVAC planner

December 14, 2016
Access to information, priority setting and proper communication between industries are of key importance for the success of designing systems. We currently have files at our disposal, which can be used in 3D modeling of these buildings and building systems. This will enhance the design process and ensure a constant flow of information between all the participants of the process. And that is what BIM (Building Information Modeling) is all about.
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Did you know that not heating water to the correct temperature can lead to Legionella contamination?

November 30, 2016
If You manage a hospital, hotel or own any heating system read our tips how to avoid Legionella. An improper micro climate with little air filtration can encourage the growth of a huge amount of contaminants, including the Legionella group.
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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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Heating efficiently: 9 hints for energy efficiency

November 2, 2016
Whether you are a tenant or the owner of a property – everybody can heat efficiently. With our hints you can save both energy and money, in that way you can minimize your ecological footprint and increase the energy efficiency of your household.
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Smart heating for offices which pays off, with reduction of costs by up to 30%

October 13, 2016
The investor's and developer's goal at the beginning of every project is quite obvious: To build or renovate the building using modern technologies. Execution costs often play a huge role in the decision-making process. However, this innocent idea does not always lead to the expected savings. One such project is the redevelopment of the historic building in the center of Prague.
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Gas boiler: Save energy with an annual professional check

September 7, 2016
Set up annual inspections for your gas boiler by a certified professional – ideally before the heating season begins. A clean and adjusted gas boiler avoids heating failure and saves energy.
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How to choose the best heat pump? Guidelines of the Swiss Heat Pump Test Centre.

July 26, 2016
A heating system based on a heat pump is characterised by durability, low maintenance and low operating costs. Eurostat data shows that heating still constitutes a significant portion of house maintenance costs.
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Maximum calorific value use with high hot water output doesn’t have to be a contradiction in terms

July 13, 2016
Apartment buildings, hotels and sports facilities often need hot water in great quantities during peak times so that everyone can shower at the same time. What is the most efficient, environmentally friendly and space-conserving way of providing this hot water?
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