ISH Frankfurt 2025: a point of reference for the HVAC and DHW sectors
The ISH Frankfurt trade fair, to be held from 17th to 21st March 2025 at the prestigious Messe Frankfurt, is widely confirmed as the leading international showcase for techology and innovation in the water, heating and air conditioning sectors (HVAC&R).
Every two years, ISH welcomes 150,000 professionals from those sectors and 2,500 exhibitors from over 60 countries, consolidating its role as a key event for companies, sector experts and stakeholders to come together and exchange ideas.
The 2025 edition will have a special focus on sustainable, digital solutions, with the aim of meeting global challenges related to energy efficiency, smart resource managment and technological innovation.
An unmissable experience for the HVAC&R sector
ISH Frankfurt 2025 will host a uniquely wide range of exhibitors, as well as offering quality opportunities for interaction and networking. The event also acts as a unique stage for delegates to find out about new technologies, offering in-depth analysis of the latest business trends and providing the perfect opportunity to consolidate professional partnerships.
One of the innovative features of this year’s edition is the event’s subdivision into eight solution fields which will not only make the visitor experience more intuitive, but also facilitate access to specific areas of interest. These will be:
- modern, sustainable bathroom solutions;
- water transportation systems;
- advanced installation technologies;
- efficient, renewable heat generation;
- air conditioning and indoor air quality;
- smart, digitalised building management;
- software for system design and management;
- industrial production for the healthcare sector and HVAC.
ISH Water and ISH Energy: the event’s core themes
Organisers of ISH 2025 have decided to divide the event into two theme-based macro-areas, in order to facilitate easy visitor access to the various parts of the trade fair even further.
The first is ISH Water, dedicated to hydrological efficiency, drinking water hygiene and sustainable bathroom design. The focus will be on technologies that ensure maximum possible comfort without wasting resources, with innovative solutions for water treatment and distribution.
The other part of the event is ISH Energy which will focus on renewable energy sources, heat generation and smart air conditioning systems. This section will include presentations of the latest developments regarding heat pumps, high efficiency boilers, ventilation and integrated energy management systems.
To complete the ISH Frankfurt 2025 experience, there will be some dedicated forums and meetings providing in-depth analysis of the latest trends in bathroom design and energy implementation.
ISH Frankfurt 2025 events and conferences
The ISH fair will not only be a trade fair but also an authentic learning and innovation hub, with a rich calendar of events and conferences, including:
- Water, Energy and Innovation Hotspots: themed spaces where a range of experts from the sector will discuss avant-garde solutions;
- Startup@ISH: an area dedicated to startups and new technologies emerging in the HVAC and water management sectors;
- Design Plus Award: recognising products which combine technological innovation and sustainable design;
- ISH Festival: a stimulating experience aimed at young professionals and apprentices, with workshops and practical activities focusing on developing key skills.
As well as the specific events listed above, ISH also offers a complete support program, with tutorials by skilled professionals and round tables to encourage debate.
Visitors can receive in-depth updates on the the most recent solutions and trends in the sector, while live demonstrations and practical presentations will allow them hands-on experience of the latest developments in and applications of construction technology.
UNILAB at ISH Frankfurt 2025: presentation of new software for HEAT PUMPS &DHW
One of the companies present at ISH 2025 will be UNILAB, which will be presenting its new software for air-water heat pump simulation and DHW (Domestic Hot Water), an innovative product for manufacturers of air conditioning and heating systems.
The heat pump market is undergoing rapid expansion, driven mainly by polices incentivising renewable energy sources and growing demand for high energy efficiency systems.
To support this phase, UNILAB has developed a simulation software, which enables the design and optimisation of air-water heat pumps destined for use in both residential and industrial settings.
The algorithm’s main features include:
- advanced thermodynamic simulation to optimise system performance from the very start of the project;
- calculation of performance indexes to improve the energy efficiency of products;
- flexible modelling to be able to customise any heat pump configuration;
- automatic generation of technical documentation which can be exported to a range of platforms;
- significant reduction of time-to-market, making the development process quicker and more efficient.
 The new DHW module: innovation for domestic hot water
Among the most significant new products presented by UNILAB, the DHW (Domestic Hot Water) module is dedicated to the design of heat pumps for high efficiency production of domestic hot water.
It supports two DHWproduction methods:
- Direct DHW: heating takes place via a spiral tube emerged in the tank, which acts as a condenser in the refrigeration cycle;
- Indirect DHW: uses a plate heat exchanger as its intermediary condenser, transferring heat to the domestic water via a separate circuit;
The software also enables:
- calculation of DHW COP in accordance with UNI EN 16147:2023 regulations;
- determination of the energy efficiency class and generation of appropriate labels;
- estimation of heating time, optimising system performance.
Unilab’s presence at ISH Frankfurt 2025 and the presentation of its innovative new software dedicated to HEAT PUMPS &DHW reflects how digital simulation has become an indispensable tool for the design of efficient, high-performace systems.
Translated by Joanne Beckwith
