Enervent Zehnder’s ventilation units work without problems even at freezing temperatures

The importance of a good indoor climate is particularly emphasized during the winter months, when we spend a lot of time at home and indoors. Enervent Zehnder’s ventilation units have been specially designed for the northern climate and varying weather conditions have been considered in our product development from the beginning.

Our units are designed to cope with large differences between indoor and outdoor temperatures. The most important thing is to remember to use the unit according to the instructions in all situations. The dimensioned air volumes should not be changed, even if it is very cold outside. When used correctly, the units do not freeze even if the humidity in the extract air rises temporarily.

In addition, the technology solution we chose – the rotary heat exchanger – is a known energy-efficient alternative.

During the winter months, the humidity decreases

In winter, heating dries out the indoor air and it is important that ventilation devices balance the humidity. When the temperature drops below 0 °C, the rotary heat exchanger recovers some of the moisture in the extract air, so that the indoor humidity remains at a healthy level.

Clean filters ensure fresh air

Our units work best when the user remembers to change the filters regularly. It is recommended that the filters in the ventilation unit be replaced at least every six months. Now is a good time to make sure new filters are ordered for the unit for the cold winter months.

The energy-saving eco mode

Our ventilation units have an energy-saving eco mode. Its purpose is to minimize the ventilation unit’s electricity consumption and maximize heat recovery, without impairing the ventilation. Using the eco mode may temporarily cause a feeling of draft on cold winter days, but at the same time provides savings in operating costs.

The filters from filterpak do an invisible, but important work

In the spring, Enervent Zehnder started a collaboration with Filterpak from Hanko in Finland. The company is known as a manufacturer of high-quality filters. Filterpak belongs to the Finnish M-Filter group, which has versatile air filter expertise, from small ventilation unit filters to special filters for industry.

Roger Lindström, who has been responsible for Filterpak’s sales for more than six years, confirms that the company has continuously invested in growth and business development in recent years.

– Filterpak changed owners in the early 2000s, when Thomas and Peter Nordlund bought the entire business from its founder. From the beginning, they had a strong vision in which direction the company should be developed. We wanted to build Filterpak into a company that promotes people’s health through innovation, says Lindström

Just before the pandemic started, the company made a big investment in expanding production. The delay in the delivery of new equipment slowed down the reforms, but according to Roger Lindström, it also brought surprising opportunities. Filterpak began manufacturing domestic surgical mouth-nose masks.

– The technology develops and Filterpak renews its equipment base at a fast pace. Currently, the most important product groups for our company are cassette filters and bag filters. Enervent Zehnder’s ventilation unit uses both solutions.

Filters are more important than you might think

In home ventilation units, the quality of the filters plays a key role. If the pressure loss is not correct, the air volumes in the unit do not remain balanced and the ventilation unit does not work correctly. The right kind of filter is also important when it comes to energy efficiency.

– Our product is undeniably quite special because it is always hidden inside the units. In addition, its task is to filter out particles from the air that are invisible to the human eye, notes Lindström.

– The filters we produce for Enervent Zehnder are not off-the-shelf items – when it comes to ventilation units, both bags and cassettes are tailored for each type of unit. This is the only way to ensure full compatibility of different unit models. Our collaboration has worked well here since the beginning.

Partnership is development together

Filterpak’s operating philosophy includes long-term cooperation with partners. The customer owns the product, but Filterpak develops it for them. Together, we carry out continuous evaluation and further development.

– Although we have invested in automation of work steps, the products are unique. In the work phases, manual work and human supervision are also still needed. We have very committed and competent staff in Hanko.

– We are proud of all our products. The cassette filters used in Enervent Zehnder’s units are 100 % domestic. Their fiber material is manufactured by Ahlström-Munksjö in Tampere, the glue comes from the family company Kiilto and we manufacture the filters for the ventilation units which are manufactured in Porvoo. A chain of four companies with Finnish work and know-how in them, summarizes Lindström.

Mikael Karlsson, who is responsible for Enervent Zehnder’s supply chain, confirms that the collaboration with the domestic filter manufacturer is also significant for the company from an economic and environmental responsibility point of view.

– The development together with Filterpak has already proven to work during the first year. By keeping supply chains short, our operations also have low emissions, which strongly supports our responsibility goals. We also wanted to do our part to influence the preservation of jobs in Finland and find a high-quality operator to which we can concentrate the production of filters.

Photo of Roger Lindström by Miikka Pirinen. Read more about M-Filter Group >>

Enervent Zehnder’s new Svea Cooler was selected for the Highlights competition at the Finnbuild trade fair

This year, the jury of the Highlights competition at the FinnBuild trade fair selected nine candidates to compete for the award for the fair’s most interesting innovation. Enervent Svea eAir E Cooler is included in the group. A ventilation unit designed and manufactured in Finland, which can have integrated compressor cooling, renews the cooling of homes.

After a four-year break, Finnbuild, a meeting place for construction industry operators, will take place at Helsinki Messukeskus in October. In the Highlights competition, the fair’s most interesting product, system and service is searched for. Enervent Svea eAir E Cooler is one of the nine selected.

The change in living requirements has increased interest in various cooling options in recent years. So far, there have only been a few options available for households. In addition to air source heat pumps, the traditional hybrid models that were previously on the market were primarily designed for commercial and office premises or restaurants. The Cooler unit developed by Enervent Zehnder to be integrated into the Svea ventilation unit brings a solution to the situation.

Svea’s Cooler unit meets customer needs

Thanks to the advanced fan technology, Svea corresponds to devices of larger size, but requires relatively little space. Despite its small size, the ventilation unit has both a rotating heat exchanger, an 800 W after heater and energy-efficient direct current fans. Enervent Svea was designed in such a way that a separate module can be placed on top of the ventilation unit. The module can contain a compressor cooling unit or, for example, water-circulating heating and cooling coils.

– Especially in new housing production, there has been a clear need for a unit that can integrate compressor cooling for a long time. Svea can be installed on the wall or ceiling. The Svea Cooler combination does not require larger space, but only increases the height of the device. The structure works like Lego blocks, and the Cooler can be retrofitted to previously purchased Svea devices, summarizes Ronni Laaksonen, who is responsible for sales at Enervent Zehnder.

The advantage of Svea Cooler is that the cooling is achieved without draft. The cooling is evenly distributed in all rooms with an supply air valve. This is a clear improvement compared to, for example, a traditional air source heat pump that only cools the space where the indoor unit is. Svea Cooler also does not need a separate outdoor unit.

Responsibility involved in development work

All of Enervent Zehnder’s product development is done at the company’s offices in Porvoo, Finland. In the same premises, there is also a climate laboratory that performs continuous testing.

– In our operations, we also want to consider the environmental impact of the company and our products. The new generation R32 refrigerant is used in Svea Cooler. It has a lower environmental load and lower climate effects than older refrigerants, Laaksonen confirms.

Deliveries of the Cooler module will begin this fall. The global shortage of raw materials has affected, among other things, deliveries of evaporator coils, which has slowed down the production schedule.

Jury of the Highlights competition:

lkka Salo, CEO, Talteka
Tapio Kivistö, editor-in-chief, Rakennuslehti
Elina Samila, circular economy expert, Green Building Council Finland
Piia Sormunen, Professor of Building Technology Industry, University of Tampere
Antti Aaltonen, Director, construction development, Construction Industry RT

More information:

Ronni Laaksonen, Head of Sales, Enervent Zehnder Oy, +358 400 230 725, ronni.laaksonen(at)enervent.com

Enervent Svea eAir E Cooler can be seen at the Finnbuild fair, stand 6d 48.

From a small workshop in Porvoo to part of an international group

Enervent Zehnder has grown from a small entrepreneur-led local company to a respected manufacturer of ventilation systems and part of one of the industry’s leading groups. The leap has been made through a few bounces, but only in a good twenty years. According to Head of Customer Excellence Sonja Häggman, the desire to develop high-quality ventilation technology and a good team spirit have always been at the heart of the company.

At the head office in Porvoo, one naturally shuttles between the offices and the production. Separate personnel passes are not needed because everyone knows each other and guests are noticed, says Sonja Häggman. Her responsibilities include Enervent Zehnder’s marketing and communication, as well as the digitalization and development of the customer experience.

– I came to work for what was then Enervent in 2002. The years have included many products, nice colleagues, many interesting tasks and five different owners. Among other things, we have been part of the technology company Ensto, also a family-owned company. The focus of our operations has remained the same and although my duties have varied, I have always worked in the customer interface.

Like many other new technologies, the developer of the rotating and energy-efficient heat exchanger in Enervent Zehnder’s equipment was an innovative entrepreneur.

– We were once founded by an entrepreneur in the metal industry. Under his leadership, a rotary heat exchanger was adapted specifically for ventilation units in single-family houses. For a long time, we operated like a traditional industrial plant. In recent years, we have invested in ensuring that the entire staff understands the customers’ wishes and common goals in the same way, Sonja says.

A member of Zehnder Group –with a task in the north

The Swiss Zehnder Group bought the business of Enervent Oy in August 2018. The group is one of the largest ventilation companies in Central Europe and is actively growing its business through acquisitions. Enervent Zehnder, operating in Finland, Sweden, and Norway (in Norway under the Exvent brand), represents the expertise of cold climate and ventilation that meets Nordic requirements in the Group.

– The change of owner was well received by us. After the deal was completed, we have been able to continue our operations quite independently, but at the same time we have received the necessary support from the group. Being part of a family business creates a safe working environment for the personnel, and we have been able to offer many interesting new products to customers after the sale.

Those with a keen eye have noticed that the color red has appeared in Enervent Zehnder’s communications.

– During the past summer, we have introduced the “Member of Zehnder Group” badges in our channels. It reminds you that we are part of a larger community. Otherwise, nothing will change – we are still the same familiar manufacturer of high-quality ventilation units suitable for Nordic homes. Zehnder is one of Europe’s largest companies in the field, which invests in both expansion, product development and personnel. It’s easy for us to smile, says Sonja Häggman.

Zehnder Group also has a separate representation in Finland for a few other product groups, such as radiators, towel warmers, ceiling-mounted heating and cooling panels and Clean Air Solutions air purification systems. This fall, the group’s products will be exhibited together for the first time at the Finnbuild fair. Welcome to stand 6d48

Monica Strandell has been appointed Head of Finance and HR at Enervent Zehnder

Monica Strandell started on 4th July at Enervent Zehnder as responsible for the company’s finances and HR. Before this, she has worked for a long time in the service of internationally operating airlines.

– In those days, choosing a profession was quite easy. At school, I liked math and geography and I studied at a Swedish-speaking business school. I wanted to combine traveling and work, so the financial administration tasks at the airline were, so to speak, the perfect option. Later, also HR became an area of ​​responsibility. The numbers are important, but the personnel ensures that the goals are achieved.

Monica thanks the good reception at her new employer.

– I have felt welcome in the company from the beginning. Both in Porvoo and in Switzerland, everyone has been friendly and helpful. I started work when the summer holiday season had just started in Finland, and I immediately left for Switzerland to meet Zehnder’s key personnel. It was a great opportunity, because it’s easier to take care of things related to finances and HR when you’ve met the people at the group’s head office in other ways than just through Teams.

According to Monica, the Finnish company is just the right size. It is also possible to see the whole from one’s own tasks. And most importantly, people from different departments quickly get to know each other. He reports to CEO Thomas Söderholm.

Monica did not know Enervent Zehnder and the company’s products before. Instead, she says that building technology has become familiar through a bend a long time ago.

– My father worked in the electrical field and my brother has always been in the HVAC field. They have been united, among other things, by industry humor and of course I have heard professional matters related to the industry in other ways. In other words, ventilation units were not a completely new thing at the start, she says.

In her free time, the sea and the forest are important elements and Monica moves a lot. He also admits to being an avid skier.

The renovation of the Helsinki Olympic Stadium was completed for the anniversary

The main stage of the 1952 Summer Olympics is one of the most famous buildings in Finland. The stadium, located in a central location in the capital, was completely renovated in 2018–2020. Enervent Zehnder ventilation units were chosen for different parts of the stadium property. In the extensive renovation project, the entire building technology was renewed to meet modern requirements.

The athletics and football stadium was completed near the center of Helsinki for the 1940 Olympic Games awarded to Finland. World War II messed up the plans. Since then, the stadium has hosted the 1952 Summer Olympics, the World Championships in Athletics, the European Championships, and numerous other public events. By the time we entered the 21st century, however, the technology and facilities were already outdated in many respects.

In a major renovation project, the stadium was expanded with a new set of underground facilities. In addition, the grandstand and field area were completely renovated. At the same time, the number of restaurants was also significantly increased. In the 70th anniversary of the home games, the stadium has already seen several large concerts and sports events.

New ventilation solutions in old quarters

The renovation of the Olympic Stadium differed significantly from new construction projects. For example, the building technology is designed for all spaces according to their intended use but respecting the original 1930s architecture. Enervent Zehnder ventilation units can be found in different parts of the stadium after the renovation.

– The stadium property is, of course, special because of its popularity and intended use. In addition to sports facilities and stands, the stadium also houses the Finnish Sports Museum and meeting rooms for rent. After the offer was approved, we checked the suitability of the unit models for the planned premises together with the contractor, says Ronni Laaksonen, who is responsible for sales.

The Finnish family company Are was responsible for the building technology project management. Kai Kellokoski, who was the project manager of the ventilation contract, was satisfied with the cooperation with Enervent Zehnder. The historic property brought challenges, but everything was overcome.

– Ventilation units were adapted to old structures and placed in cramped spaces according to current standards. Installation work was from time to time done in very difficult conditions, which requires solid professionalism from the installers, Kellokoski states.

– Enervent Zehnder’s devices were already familiar, and there were no surprises with them. The devices have a good price-quality ratio and advanced automation. The company also handled all additional requests in an exemplary manner, Kellokoski confirms.

Decentralized equipment solutions are needed for the ventilation of valuable objects

The air flow capacity of the ventilation unit and its location determined the best option for each space. Enervent Zehnder’s units were installed, among other places, in the stadium’s store, conference rooms and emergency rooms.

– A de-centralized ventilation solution is often the only option in a valuable property to be renovated, if ventilation is to be carried out successfully with small ducts. We delivered a total of six different unit models to the stadium. Our own installers were on site to make sure everything went smoothly, says Ronni Laaksonen.

The renovation of the Olympic Stadium has been awarded both the Finlandia Award for Architecture and the Concrete Structure of the Year Award 2020.

Mikael Karlsson in charge of Enervent Zehnder’s supply chain from 1st June

Mikael Karlsson (M.Sc., MBA) has been appointed Head of Supply Chain since the beginning of June. He is also still responsible for the company’s product development.

Mikael is a long-time employee of Enervent Zehnder and joined the company after his studies in 2005. During his career, he has held various positions, such as electrical designer, laboratory tester and various product development responsibilities, including project manager. In 2016, Mikael was given lead responsibility for Enervent Zehnder’s product development and was appointed a member of the Management Team. In June, in addition to the above, the area of ​​responsibility expanded to cover the company’s entire supply chain (procurement – production – logistics).

– It has been great to be involved in various roles in influencing the development of ventilation technology. I started working as an electrician in the summer job and have been regularly given new and interesting jobs by my employer, which has been a strong motivator. During this time, the company has changed owners, the product range has been developed and the market has become more international, but the team spirit has remained excellent in all changes, says Mikael Karlsson.

– The new role brings its own challenges. We are also affected by the development of raw material costs and availability problems. We compete with big industries for the same batches of material, he notes.

Mikael Karlsson reports to Managing Director Thomas Söderholm.

Enervent is Zehnder’s expert on northern climate

Thomas Söderholm took over the management of our company in May 2020. We asked him to tell us how the two-year crisis has affected management and what the future looks like this spring.

Thomas Söderholm was given the task to strengthening Enervent Zehnder’s profile as a solution provider of high-quality ventilation technology and an expert on Nordic climate in the international market. Thomas, an experienced export trade expert, had previously worked for Tikkurila Oyj for several years, most recently as the CEO of a German subsidiary. Taking responsibility during the exceptional circumstances brought about by the pandemic immediately changed many previous practices on the fly.

– The company’s high level of technological know-how and the convincing market position of the Zehnder Group made me interested in the task. Many things changed even before I had time to start working for the company. Recruitment-related meetings with Group executives in Switzerland literally switched to digital channels overnight. It is illustrative that it was not until this spring that I met our Norwegian team face to face for the first time, Söderholm says.

Thomas Söderholm has worked for a long time in an international environment and has lived abroad for several years. However, the atmosphere in the Zehnder Group came as a positive surprise.

– The language skills acquired in Germany over the years and the adoption of a Central European work culture have clearly been useful in my current role. One could say that it acted as an icebreaker in the beginning when face-to-face meetings were not possible. The atmosphere in Zehnder Group is quite family-run and communication is open, even though it is a large international player with a turnover of around EUR 700 million.

In addition to the pandemic, material shortages are a nuisance

– The most important thing is that our personnel have remained safe and healthy, and we have not had to interrupt production at any stage. Correspondingly, material shortages and component availability problems have brought major challenges. Costs have risen sharply for metals, plastics, and electronic components, which has, of course, had a direct impact on us as well. Our sourcing department has had to be tough as we compete with the automotive and telecom industries for the same batches of materials.

– It may sound strange, but the pandemic has had good effects as well. On the positive side, public awareness of the existence of ventilation, clean indoor air and a pleasant indoor climate has clearly risen, and construction has even picked up.

Common Northern Climate – different practices

In addition to Finland, the company’s main markets include Sweden, Norway and northern Central Europe. How do differences between countries affect Enervent Zehnder’s operations?

– It was actually a surprise to myself that there are relatively large differences in practice between Finland, Sweden and Norway. What the Nordic countries have in common is that ventilation solutions with heat recovery are favoured in new construction. In Finland and Norway, apartment-specific ventilation equipment is more popular than in Sweden, where centralized solutions for several apartments have traditionally been more popular. Country-specific regulations also affect the market. Norway has very strict requirements for the energy efficiency of ventilation equipment. Partly for that reason, we have gained a strong foothold there. Our rotary heat exchanger is very energy efficient.

An unpredictable future

Developments in Europe in recent months have forced actors in different sectors to look at things in a new way.

– The year 2021 went well for us at Enervent Zehnder and we can be satisfied with the results. This year has also started strongly. In the past, we saw promising growth opportunities and potential in emerging markets in Russia, especially in high-quality housing. Now the situation has changed rapidly in that regard.

– We are currently working on a new strategy, and in the future the Group’s internal cooperation will continue to deepen. It is important to ensure the supply chain and maintain the profitability of the business despite rising raw material costs and uncertainty in the business environment.

Thomas Söderholm is confident about the future.

– We are known as a quality manufacturer and supplier. In addition, we now have a large group in the background, with whom I see a lot of opportunities to increase cooperation in, for example, product development and product ranges. We have every opportunity to gain a bigger foothold in the northern market.

Enervent Zehnder ventilation equipment solutions were customized for the valuable building on Bulevardi in Helsinki

In the spring of 2022, the valuable property on Helsinki’s Bulevardi will be renovated back into high-quality apartments after being in commercial use for a long time. The architect Arkkitehtitoimisto Neva, which specializes in historic buildings, has been responsible for the design. The material and equipment choices of the neo-renaissance building have been made carefully to the smallest detail, taking into account the spirit and history of the house.

There will be 28 apartments in the building on Bulevardi 14. They range in size from a comfortable studio apartment to several hundred square meters of representative housing. In addition, the complex includes 11 commercial premises, of which some are aimed at consumer customers and are located at street level.

The ventilation of the valuable building is implemented with modern technology. The ventilation of each apartment is tailored for the apartment. Like all other products selected, the ventilation equipment has a high standard. Enervent Zehnder supplies ventilation units for all apartments and commercial premises – a total of five different unit models are required.

The building technology is being renewed under the supervision of the Helsinki City Museum

Heikki Sivonen is responsible for Lämpökarelia’s Southern Finland unit, which is responsible for the renovation of the HVAC technology in the building. The responsibility is considerable, as the entire building and building technology of the building will be renovated. An additional challenge is that no visible changes may be made to the historic facade of the house.

– Together with the designer, it was our responsibility to find the best solution and equipment for the ventilation. Our goal was to have units from the same supplier in all premises, which always facilitates logistics and planning of installation work. It will continue to play a role in future service and warranty matters. Enervent Zehnder was able to put together a customized package that corresponds to our request for quotation, Heikki Sivonen says.

Sivonen was already familiar with Enervent Zehnder’s products from previous projects.

– Enervent has rotary heat exchangers suitable for the northern climate in all its units. The units are easy to use and user friendly. In addition, they are elegantly simple on the outside which makes them fit unobtrusively into the premises of Bulevardi 14 type objects, where all users appreciate the high-quality finish, confirms Sivonen.

Suitable ventilation solutions for all squares metres

The apartment-specific ventilation equipment has been carefully selected for the dwellings in Bulevardi 14, considering the requirements and special needs of apartments of different sizes. The airflow capacity of the ventilation unit and its location determine the best option for each apartment.

– Our smallest units are compact ventilation units that are equipped with electric after heating. In smaller apartments, the ideal use of space has also been considered. In these, the Salla ventilation unit is imperceptibly placed, for example, on top of a wardrobe. Larger apartments have their own utility rooms, where it has been natural to place the unit. Correspondingly, the air volume demand of these apartments is higher, and they also provide cooling for each apartment via the ventilation system, when the solution is combined with district cooling, says Ronni Laaksonen, who is responsible for Enervent Zehnder’s sales.

– Depending on the size of the apartments and the air volume needed, Pingvin XL, Pelican Z or Pegasos Z ventilation unit models have been selected for the most spacious apartments. In street-level commercial premises, ventilation is provided by Enervent Pallas, which has a larger capacity.

Descendants know the architect Waldemar Aspelin, who designed the building at the time, as a stylist. In honour of its 125th anniversary in 2021, Bulevardi 14 will return to its original use. It will once again become an impressive residential building in one of Helsinki’s most important blocks.

Enervent Zehnder received international certification for its residential ventilation units

Enervent Zehnder, a manufacturer of ventilation equipment for the northern European climate, has received impartial third-party certification for all ventilation units developed for residential ventilation. The Eurovent Certified Performance mark indicates that the certification of the company’s equipment is internationally recognized and approved.

 Enervent Zehnder Oy, which specializes in residential ventilation solutions, has been manufacturing ventilation equipment in Porvoo in Southern Finland for more than 30 years. Many know the company as Enervent. The Swiss Zehnder Group became its owner in 2018.

Recognition by the independent Eurovent Certita Certification Body (ECC) facilitates the comparability and classification of ventilation equipment on the international market. The ECC tests examine both the energy efficiency and consumption as well as the heat recovery efficiency of the equipment to be certified.

– The EU Ecodesign Directive and the Energy Labeling Regulation for ventilation units is about the energy efficiency of the products and at the same time define which are so-called residential ventilation units, ie units developed for residential use. A residential ventilation unit is a unit with a maximum airflow not exceeding 250 cubic meters per hour or a maximum airflow of 250 to 1,000 cubic meters per hour – and the manufacturer has stated that it is intended exclusively for residential properties, says Tom Palmgren, Chief Technology Officer at Enervent Zehnder.

In addition to Finland, Enervent Zehnder sells its ventilation equipment to other Nordic countries and northern Central Europe. Eurovent certification strengthens the company’s export trade.

– We obtained certification for all our ventilation units with heat recovery and heat pump technology for ventilation in residential buildings. More specifically, this means the unit series Pinion, Salla, Svea, Pingvin XL, Pandion, Pelican, Alta, LTR-3 and LTR-5.

– Our role in Zehnder Group is to be an expert on ventilation in cold climate. Certification by an impartial body is an important guarantee of quality for us as an export company around the world. As with many other products, national certifications are available for ventilation equipment. However, their importance is limited when going beyond domestic borders, Palmgren recalls.

More information:

Tom Palmgren, Technology Manager, Enervent Zehnder Oy, +358 400 500 599, tom.palmgren@enervent.com